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63rd EAGE Conference & Exhibition
- Conference date: 11 Jun 2001 - 15 Jun 2001
- Location: Amsterdam, Netherlands
- Published: 11 June 2001
401 - 500 of 516 results
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Time-Lapse Crosswell Tomography in the Atabaska Tar Sands Area
Authors A. Droujinina, C. MacBeth and P. CorbettP205 TIME-LAPSE CROSSWELL TOMOGRAPHY IN THE ATABASKA TAR SANDS AREA Abstract Two crosswell seismic surveys were acquired in the Atabaska Tar Sands at Steepbank oil-sand reservoir before and after the start of the steam injection. The objective of the survey was to monitor the shape and the movement of the steam zone. Since seismic velocities decrease with increase of temperature any variations in compressional and shear wave velocities may indicate the advance of the steam zone. High resolution tomographic images have been derived from the crosswell data using direct P- and shear wave arrival times. The direct shear wave arrival
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Comment on the Structural Index Used in Euler Deconvolution for the Step Structure in Gravimetry
By R. PastekaP211 COMMENT ON THE STRUCTURAL INDEX USED IN EULER DECONVOLUTION FOR THE STEP STRUCTURE IN GRAVIMETRY R. PASTEKA Abstract 1 The commonly adopted structural index value used when applying Euler deconvolution to the step/contact in gravimetry is N = 1. An argument based upon analytical considerations and empirical data suggests that the value N = −1 is more appropriate. The precise interpretation of the derivation shows that the anomalous field from this structure is not homogeneous in Euler’s sense. However it is shown that after introducing a modification of the method using the interference polynomial concept (adopted from the known
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Testing Extended Euler Deconvolution on the Central Amazon Geophysical Anomaly, Brazil
Authors J.D. Fairhead, S.E. Williams, V. Lesur, M.F. Mushayandebvu and O.B. De PaulaP212 TESTING EXTENDED EULER DECONVOLUTION ON THE CENTRAL AMAZON GEOPHYSICAL ANOMALY BRAZIL 1 S.E. WILLIAMS 1 V. LESUR 1 J.D. FAIRHEAD 1 2 M.F. MUSHAYANDEBVU 1 and O.B. DE PAULA 3 Summary Extended Euler deconvolution is a major advance in the interpretation/inversion of magnetic data to determine source structure. Traditional profile and grid based Euler methods have been restricted to estimating source location whereas Extended Euler allows the full determination of location (x y z) dip and susceptibility contrast for 2D structures as well as strike if using grid data. The grid based method can also differentiate between 2D and
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Regional Gravity Analysis of the Sirt Basin On-Offshore, N. Central Libya
Authors A.M. Abadi, P.M. Van Dijk, R. Stephenson and S. CloetinghP213 REGIONAL GRAVITY ANALYSIS OF THE SIRT BASIN ON-OFFSHORE N. CENTRAL LIBYA 1. Introduction and exploration history 1 A.M. ABADI 1 P.M. VAN DIJK 1 R. STEPHENSON 2 and S. CLOETINGH 2 1 Geological Survey Division International Institute for Aerospace Survey and Earth Sciences (ITC) Hengelosestraat 99 7500 AA Enschede The Netherlands. 2 Faculteit der Aardwetenschappen Vrije Universiteit Recoverable reserves in approximately 320 fields in Libya's Sirt Ghadamis Murzuq and Sabratah Basins exceed 52 billion barrels oil and 40 trillion cubic feet gas. The great majority of these reserves are located in the Sirt Basin. Approximately 80 percent of the
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3D Gravity Data Inversion for Estimating Shape of an Ore Body
Authors M. Mirzaei and H. AaseiP215 3D GRAVITY DATA INVERSION FOR ESTIMATING SHAPE OF AN ORE BODY 1 3D inversion of gravity data was carried out to find the extension of a koromite ore body. After applying all corrections the regional trend is eleminated by fitting orthonormal polynomials to the data. The data region is parameterized by rectangular blocks. Since the ore body had outcropt the residual data is inverted for the depth to the top of the models with fixed density contrast between the ore body and the surounding medium. The inversion is executed in the subspace of the model space to control the
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Application of Potential Field Data to Interpretation of the Porcupine Basin, Offshore Ireland
Authors S. Reford, D.J. Misener, J. Zhu and T. DavittP216 APPLICATION OF POTENTIAL FIELD DATA TO INTERPRETATION OF THE PORCUPINE BASIN OFFSHORE IRELAND D.J. MISENER 1 J. ZHU 1 S. REFORD 1 and T. DAVITT 2 Abstract A compilation of magnetic and gravity data (ARK Geophysics Limited 2000) covering the Porcupine Basin located offshore west of Ireland was carried out as a prelude to an interpretation study. The purpose of the study was to highlight deep and shallow crustal structure and provide a regional structural framework incorporating the adjacent shelf and onshore areas. The aeromagnetic data incorporated a compilation of high-resolution surveys onshore and a high-resolution survey offshore over
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Salt Basin Complex Structure Seismic Depth Imaging Supported by Gravity
Authors K. Sydykov, A. Matusevich and S. TarbaevP217 SALT BASIN COMPLEX STRUCTURE SEISMIC DEPTH IMAGING SUPPORTED BY GRAVITY 1 KAIRAT SYDYKOV 1 ALEXANDER MATUSEVICH 2 and SAGINGALI TARBAEV 3 1 Zaysan JV Gogol Street 86 480091 Almaty Kazakhstan 2 Specialized Gravimetry Enterprise Ministry of Natural Resources 3 Kazakhoil-Emba Summary Practical seismic depth imaging of beneath salt structures first of all requires accurate knowledge of the salt model. The most complicated case is under salt overhang structure imaging. Integrated seismic and gravity data based modeling of salt domes represents an efficient tool for salt overhang delineation and thus provides a complimentary information to support prestack salt context structure
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Unified Processing of Gravity Data in Vienna Basin and Surrounding Areas
Authors J. Sedlák, J. Bimka, H. Granser, V. Szalaiová and B. ŠalyP218 UNIFIED PROCESSING OF GRAVITY DATA IN VIENNA BASIN AND SURROUNDING AREAS Summary 1 Primary gravity data in the Vienna Basin and surroundings consist of 96 487 gravity stations that covers 16 790 sq km of the territory of the Czech Republic Slovakia and Austria. The unified processing of the data was carried out and several types of gravity maps were constructed. The maps depict gravity effects of the tertiary fill of the Basin as well as structural-tectonic features of the surrounding and uderlying geological units. The petroliferous area of the Vienna Basin and adjacent geological units (Flysh Belt Neogene
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Quarternary Deposits Recognition in NE Part of Poland with the Use of Gravity Method
Authors L. Kacprzyk and A. WójcickiP219 QUARTERNARY DEPOSITS RECOGNITION IN NE PART OF POLAND WITH THE USE OF GRAVITY METHOD LESZEK KACPRZYK and ADAM WOJCICKI PBG (Geophysical Exploration Company) Jagielonska Street 76 03-301 Warsaw Poland Abstract The presentation is devoted to show possibilities of solving Quarternary and Engineering geology tasks with the use of gravity method. The problem consists in structural recognition of Quarternary cover and sub-Quarternary basement with the use of gravity data interpretation techniques on the example of the area Biebrza River valley. 1 Introduction In Poland integrated investigations of Quarternary deposits have been conducted since 20 years. During particular investigations a detailed
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Bayesian Joint Inversion of Geophysical Data
More LessP220 BAYESIAN JOINT INVERSION OF GEOPHYSICAL DATA Summary 1 A new method for the joint inversion of geophysical data based on the Bayesian framework has been developed. Contrary to the traditional joint inversion that simply incorporates two different kinds of observed data into one sensitivity matrix a probabilistic approach has been devised to infer and appraise a posteriori structure of final estimation. Geostatistical techniques especially kriging and simulation were used to implement a priori information usually difficult to deduce. An application of this technique to the gravity and resistivity data for finding the lava tunnel was performed and the analysis
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Integrated Geomechanical Modelling for Deep Subsurface Damage
Authors B. Orlic, J.D. Van Wees, W. Zijl, P. Jongerius, G.J. Schreppers and M. HendriksP221 INTEGRATED GEOMECHANICAL MODELLING FOR DEEP SUBSURFACE DAMAGE Abstract 1 Government E&P and mining industry increasingly demand fundamental insight and accurate predictions on subsurface and surface deformation and damage due to exploitation of subsurface natural resources and subsurface storage of energy residues (e.g. CO2). At this moment deformation is difficult to assess and prove although economical environmental and societal interests are huge in terms of strain on granting concessions failure of exploration targets (potential) damage claims etc. NITG-TNO the geoscience institute of TNO and TNO-BOUW the building and construction institute of TNO have started a close cooperation on this topic.
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Airborne Hyperspectral and Magnetic Surveys
More LessP225 AIRBORNE HYPERSPECTRAL AND MAGNETIC SURVEYS HONG YANG and SUSANNE WITTE Shell Technology EP Volmerlaan 8 Postbus 60 2280 AB Rijswijk The Netherlands 1 Abstract High resolution airborne surveys such as hyperspectral and aeromagnetics are cost effective techniques for rapid acreage screening. Hyperspectral data can be used to identify hydrocarbon seepages and surface mineralogy; high resolution airborne magnetic data can reveal intra-sedimentary faults and lateral rock property variations often invisible on seismic data. However current safety statistics show an unacceptable high fatality rate associated with this kind of data acquisition especially for low level flying. The Personal Exposure Rate of
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HiRES-1 Aeromagnetic Data Indicate New Geological Structure in Central England
Authors R.J. Cuss, R.J. Peart and T. PharaohP226 HiRES-1 AEROMAGNETIC DATA INDICATE NEW GEOLOGICAL STRUCTURE IN CENTRAL ENGLAND R.J. CUSS R.J. PEART and T. PHARAOH British Geological Survey Keyworth Nottingham NG12 5GG UK Abstract 1 The HiRES-1 airborne survey of central England was flown by the British Geological Survey (BGS) in collaboration with World Geoscience (UK) Ltd. (now part of Fugro Airborne Surveys Ltd.) in 1998. The magnetic data were in part severely affected by cultural noise. Because as yet we have not discovered a fully satisfactory automated de-culturing routine the data were cleansed manually. Early examination of the resulting data set allows the extension and interpolation
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Sea Bed Magnetic Monitoring - Methodology and Instrumentation
Authors V. Korepanov and A. PrystaiP227 SEA BED MAGNETIC MONITORING - METHODOLOGY AND INSTRUMENTATION 1 VALERY KOREPANOV and ANDRII PRYSTAI Lviv Centre of Institute of Space Research 5a Naukova St. 79000 Lviv Ukraine Summary A constantly growing interest to the sea bottom experimental study of electromagnetic fields is observed throughout the world. This interest was stimulated first of all by the increased exploration of the offshore zones for the prospecting of new mineral deposits as well as for the monitoring of natural hazards. Other stimulating purpose is the recent success in the development of the reliable autonomous sea bed electromagnetic instrumentation although its price is
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UXO and Hazardous Metallic Waste Detection Technologies for Use in Litigation-Conscious Environments
By J.M. StanleyP228 UXO AND HAZARDOUS METALLIC WASTE DETECTION TECHNOLOGIES FOR USE IN LITIGATION-CONSCIOUS ENVIRONMENTS Abstract 1 Digital electromagnetic and total field magnetometers operated at ground level have been determined from trials in many diverse environments as the most appropriate technologies currently available for locating buried hazardous metallic objects such as unexploded ordnance. Appropriately used these devices enable a very high detection probability to be economically achieved with quantifiable and defensible assurance. Introduction Since the first digital metal detecting technology with automatic recording of positioned data was developed for the Australian Department of Defense in 1985 unexploded ordnance (UXO) detection has been
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Three Consequences of Removing the Primary Field from Airborne EM Data
By R.S. SmithP229 THREE CONSEQUENCES OF REMOVING THE PRIMARY FIELD FROM AIRBORNE EM DATA 1 R.S. SMITH Fugro Airborne Surveys 2060 Walkley Rd Ottawa Ont K1G 3P5 Canada Abstract In removing the primary field from fixed-wing time-domain airborne EM data the response is decomposed into the time-domain “in-phase” and “quadrature” components. The primary is approximated by the in-phase component which varies significantly as the transmitter-receiver separation changes. The quadrature component is purely a secondary response. In the off time the quadrature response is very similar to the total secondary response; however there are large differences in the on time and even some
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A Technique for Inversion of 2D Magnetic Anomalies Represented by Their Magnitudes
By P.Y. StavrevP230 A TECHNIQUE FOR INVERSION OF 2D MAGNETIC ANOMALIES REPRESENTED BY THEIR MAGNITUDES P.Y. STAVREV University of Mining and Geology “St. Ivan Rilski” Department of Applied Geophysics 1700 Sofia Bulgaria 1 SUMMARY The analytic expressions of a magnetic anomalous field represented by its vector magnitudes and their gradient and Laplacian reveal opportunities for an effective depth and shape inversion in terms of model sources widely used in the first stage of data interpretation. An estimate of the depth of a source causing magnetic field of one singular point can be obtained directly without assumptions about the source’s shape and vector
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Trends in the Secular Variation of the Earth's Magnetic Field
Authors D. Martini and A. KörmendiP231 TRENDS IN THE SECULAR VARIATION OF THE EARTH'S MAGNETIC FIELD DANIEL MARTINI 1 and ALPAR KORMENDI 2 1 Summary 1 A world-wide network has been continuously monitoring the secular change of the Earth’s magnetic field. More than 70 countries operate about 200 observatories throughout the world nowadays. The database which has been collected by the observatories gives us a chance to make a study of the temporal behaviour of the Earth’s magnetic field and to understand the features of these and related phenomena. Precise removal of the temporal variations is fundamental in any high-accuracy magnetic survey and magnetic map
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Changes of Thermal Conductivity of Some Igneous and Metamorphic Rocks with Depth
Authors T.S. Lebedev and V.I. ShapovalP232 CHANGES OF THERMAL CONDUCTIVITY OF SOME IGNEOUS AND METAMORPHIC ROCKS WITH DEPTH TARAS S. LEBEDEV and VLADIMIR I. SHAPOVAL Institute of Geophysics National Academy of Sciences 32 Palladin Avenue 03142 Kiev Ukraine 1 Results of experimental studies of thermobaric changes of the thermal conductivity coefficient (λ) of some mineral formations of the Central Precambrian Ukrainian Shield with depth are presented and prognostic estimations of its depth distribution are given The thermal conductivity of rocks was studied in laboratory conditions of high themperature (T≤+350°C) and pressure (P≤0.6 GPa). At room and high temperature λ was measured by a standard device
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The Prediction of Changes of a Radiological Situation of Industrial Advanced Regions of NIS
Authors O.K. Tyapkin, A.G. Shapar and J.G. TroyanP233 THE PREDICTION OF CHANGES OF A RADIOLOGICAL SITUATION OF INDUSTRIAL ADVANCED REGIONS OF NIS 1 OLEG K. TYAPKIN 1 ARKADY G. SHAPAR 1 and JACOB G. TROYAN 2 1 Institute of Problems on Nature Management & Ecology of Ukrainian Academy of Sciences 6 Moskovskaya st. 4900 Dnieropetovsk Ukraine 2 Institute of Geography of Ukrainian Academy of Sciences Summary. The analysis of distribution of radioactive substances natural and technogenic origin in components of an environment and dozes of a radioactive irradiation of the population of industrial advanced regions of NIS is given. The prediction of development of radiological situation on
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Separate Prediction of Oil and Gas Deposits in Oil-Gas Systems of South Caspian Basin
By R. RustamovP501 SEPARATE PREDICTION OF OIL AND GAS DEPOSITS IN OIL-GAS SYSTEMS OF SOUTH CASPIAN BASIN RAID RUSTAMOV AzNIPINeft Aga Neymatulla street 39 370033 Baku Azerbaijan 1 General purpose of this report is to reveal the most informative factors for a separate prediction of oil and gas content from many other parameters of subsurface fluids. For the best settlement of our problem method of complex data analysis was applied (data about subsurface waters phase condition of hydrocarbons in deposits of different hydrogeochemical conditions were used). Special attention was paid to the analysis of conditions of gas-condensate and oil accumulation zones’ formation
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Geochemical Characteristic of Oils and Menilite Source Rock in the Polish Flysch Carpathians
Authors D. Wieclaw, M.J. Kotarba and A. KowalskiP502 GEOCHEMICAL CHARACTERISTIC OF OILS AND MENILITE SOURCE ROCK IN THE POLISH FLYSCH CARPATHIANS D. WIECLAW M. J. KOTARBA AND A. KOWALSKI University of Mining and Metallurgy Faculty of Geology Al. Mickiewicza 30 30-059 Cracow Poland 1 SUMMARY Results of stable carbon isotope and biomarker analyses of 10 oils and 20 Oligocene Menilite source rock samples from the Polish Flysch Carpathians provide compelling evidence for a genetic relationship between them. Total organic carbon (TOC) content in the Menilite shales significantly vary from 1.73 to 12.2 wt. %. Maturity type II kerogen ranges between 0.4 and 1.7% in vitrinite reflectance scale
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Petroleum Generation from the Zechstein Main Dolomite Carbonates in the NW Poland
Authors P. Kosakowski, M.J. Kotarba, P. Poprawa and T. WilczekP503 PETROLEUM GENERATION FROM THE ZECHSTEIN MAIN DOLOMITE CARBONATES IN THE NW POLAND P. KOSAKOWSKI 1 M. KOTARBA 1 P. POPRAWA 2 and T. WILCZEK 3 SUMMARY 1 Organic geochemistry analyses and BasinMod™ modelling have been applied to evaluate the hydrocarbon potential of the Zechstein Main Dolomite carbonates in the Western Pomeranian Region. The available selection of well cores allowed for analyses of spatial distribution of lithofacies types organic carbon content and geochemical parameters of the potential source rock. For analytical studies 1706 core samples from 129 wells were used. The history of hydrocarbon generation and expulsion for the studied
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Petroleum Systems of the Adriatic Offshore, Croatia
More LessP504 PETROLEUM SYSTEMS OF THE ADRIATIC OFFSHORE CROATIA Summary The Adriatic offshore of Croatia extends from the Istrian peninsula in the northwest to the Dubrovnik offshore area in the southeast and from the Croatian coast to the offshore boundary with Italy. The Adriatic offshore (Adria) represents a part of the Apulian continental plate placed within the Tethys ocean between Africa and Europe for the most of the Mesozoic age. Adria became a part of the alpine orogenic system by effective closure of Tethyan oceanic realms and associated basins in the Late Cretaceous and by the collision with the Dinarides to
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Paleogeographic Interpretation of Paleozoic Hydrocarbon Systems in the Ghadamis and Murzuq Basins, NW Libya in Relation to the Intervevening Al Qarqaf Arch
Authors Y. Al Fasatwi, P. Van Dijk and H. DronkertP505 PALEOGEOGRAPHIC INTERPRETATION OF PALEOZOIC HYDROCARBON SYSTEMS IN THE GHADAMIS AND MURZUQ BASINS NW LIBYA IN RELATION TO THE INTERVENING AL QARQAF ARCH Y. AL FASATWI 1 P. VAN DIJK 1 and H. DRONKERT 2 1 1 International Institute for Aerospace Survey and Earth Sciences PO Box 6 7500AA Enschede The Netherlands 2 Department of Applied Earth Sciences Delft University of Technology ABSTRACT Al Qarqaf Arch separating the Ghadamis and Murzuq Basins represents an interesting problem in the structural and stratigraphic evolution of North African Basins. The Arch was periodically a high in Early Palaeozoic times and remained as a
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Quantitative Modelling of Petroleum Systems of Inverted Basins in the Netherlands
Authors H.J. Simmelink, R.T. Van Balen, F. Van Bergen, J.M. Verweij, P. David, J.D. Van Wees and H.J.M. PagnierP506 QUANTITATIVE MODELLING OF PETROLEUM SYSTEMS OF INVERTED BASINS IN THE NETHERLANDS H.J SIMMELINK 1 R.T. VAN BALEN 2 F. VAN BERGEN 1 J.M. VERWEIJ 1 P.DAVID 1 J.D. VAN WEES 1 and H.J.M. PAGNIER 1 1 Netherlands Institute of Applied Geoscience TNO - National Geological Survey Department of Geo-Energy P.O. Box 80015 3508 TA Utrecht The Netherlands 2 Free University Amsterdam Faculty of Earth Sciences Abstract 1 The petroleum systems in the inverted Broad Fourteen Basin West Netherlands Basin and Roer Valley Graben have been quantitatively modelled. These basins result from multiple Mesozoic rifting events. During the Late Cretaceous
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Diagnostic Post Mortem of Drilled Prospects in Tunisia
Authors M. Chaabouni and A. JlailiaP507 DIAGNOSTIC POST MORTEM OF DRILLED PROSPECTS IN TUNISIA MOUNIR CHAABOUNI and ALI JLAILIA ETAP 27bis Avenue Khereddine Pacha 1002 Tunis Belvedere Tunisia 1 “Diagnostic post-mortem of drilled prospects” is a project created by Studies Exploration Supervision of ETAP in 1998 to re-evaluate most of the dry holes in Tunisia. Using advanced technology more know-how and new geologic concepts a re-examination of dry holes can yield valuable information concerning future efforts and improvement in success rate by: * Development of a Zonal Risk Map as a guide for future exploration and risk assessment. This approach provides operationally-oriented studies to analyze
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Pseudo-Source Rock Identification - a Classic Example of Najmah Formation from Kuwait Petroleum Province
Authors S.K. Bhattacharya and A. KhamissP508 PSEUDO-SOURCE ROCK IDENTIFICATION: A CLASSIC EXAMPLE OF NAJMAH FORMATION FROM KUWAIT PETROLEUM PROVINCE Abstract 1 AWATIFF KHAMISS AND S.K.BHATTACHARYA Kuwait Oil Company Exploration Geology Division P.O.B. 9758 61008 Ahmadi Kuwait A high gamma shale with high TOC (total organic carbon) and high HI (hydrogen index) are not sufficient criteria to describe the source rock character of particular sedimentary unit. Together with these an assessment is to be made if this high HI is actually related to the available TOC or this HI is an external input with TOC now available in the rock. The present paper deals with a
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Timing of Gas Generation in the SE Dniepr-Donetsk Basin, Ukraine
Authors V. Shymanovskyy, V. Privalov, R.F. Sachsenhofer and M. ZhykalyakP509 TIMING OF GAS GENERATION IN THE SE DNIEPR-DONETSK BASIN UKRAINE Summary 1 1D numeric models were applied to reconstruct the timing of gas generation from Carboniferous coalbearing sediments in the southeastern part of the Dniepr-Donetsk Basin. Timing of gas generation varied in different areas. Gas generation in the Donbas area occurred mainly during Permo-Carboniferous deep burial. Some areas in the Donbas are characterised by an additional thermal event which postdates Permian uplift. This resulted in a second generation phase. Gas generation from Lower Carboniferous sediments in the central part of the Dniepr-Donetsk Basin (Vp-8 well) started in Permian time
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Basin Modelling of the Gulf of Gabes, Tunisia - Structural Evolution and Hydrocarbon Potential
Authors Z. Dey, M. Saidi, A. Bouhlel, H. Inoubli and H. Ben KilaniP510 BASIN MODELLING OF THE GULF OF GABES- TUNISIA - STRUTURAL EVOLUTION AND HYDROCARBON POTENTIAL 1 Z. DEY M. SAIDI A. BOUHLEL H. INOUBLI and H. BEN KILANI ENTREPRISE TUNISIENNE D’ACTIVITES PETROLIERES Exploration Studies Department 27 Bis Av. K. Pacha 1002 Le Belvedere Tunis Tunisia The studied area located in the Pelagian platform covers the whole Tunisian part of the Gabes-Tripoli Basin. It is bordered to the south by the NE-SW Jeffara fault to the west by the N-S Axis and to the north by the "Mahdia-Isis" Paleohigh. The Triassic-Pleistocene lithostratigraphic column encountered in the Gabes Basin consists of a
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Cercina Oil Field, Tunisia - Petroleum Geochemistry and Basin Modelling
Authors M. Saidi, Z. Dey and A. BouhlelP511 CERCINA OIL FIELD TUNISIA – PETROLEUM GEOCHEMISTRY AND BASIN MODELLING 1 M. SAIDI Z. DEY and A. BOUHLEL ENTREPRISE TUNISIENNE D’ACTIVITES PETROLIERES Exploration Studies Department 27 Bis Av. K. Pacha 1002 Le Belvedere Tunis Tunisia. The purpose of this study based on the analytical and well data (RE 13 C for oil GC-MS determinations for biomarkers hydrocarbon composition of oils bottom hole temperature) integrated with the structural model and tectonic history is to determine the origin of the oils the timing of hydrocarbon generation and expulsion from the source rock and the most likely pathways of HC migration. Cercina
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Petroleum Play-Concept for Main Oil/Gas Fields in the Southern Moesian Platform, Bulgaria
Authors G. Georgiev, A. Bechtl, R. Sachsenhofer and R. GratzerP512 PETROLEUM PLAY-CONCEPT FOR MAIN OIL/GAS FIELDS IN THE SOUTHERN MOESIAN PLATFORM BULGARIA 1 Introduction Exploration in Bulgaria for more than 50 years (since 1949) has resulted in about 30 oil and gas discoveries but only 12 of them are economic (Table 1 Fig. 1). Among the authors studied before 1990 the genesis of main crude oils in Bulgaria there have not unified perception. Recently the hydrocarbon source rock potential was analyzed by Rock Eval pyrolysis and the correlation of oils and source rocks was investigated by Gas Chromatographic - Mass Spectrometric (GC and GC-MS) and stable carbon isotopes (
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Petroleum Systems of Russian Oil-Gas Basins
Authors Y.K. Burlin and B.A. SokolovP513 PETROLEUM SYSTEMS OF RUSSIAN OIL-GAS BASINS Y.K. BURLIN and B.A. SOKOLOV Moscow State University Geological Department 119899 Moscow Russia 1 There are approximately 40 basins on territory of Russia and offshore. These basins have formed and developed under the diverse geodynamic environments. Many scientists have proposed their generalized geodynamic basin classifications (Bally 1975; Perrodon 1980; Sokolov 1985; Khain et al 1991; Wan Jun et al 1997 and oth.). According to the geodynamic environments and evolution it is convenient to distinquese in Russia the several categories of basins: 1) suprarift basins on cratons with tendency of moderate compression at final
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2D Modeling of Hydrocarbon Generation, Migration and Accumulation of Hydrocarbon in the Berkine Basin, Eastern Algeria
Authors N. Yahi, R.G. Schaefer and R. LittkeP514 2D MODELING OF HYDROCARBON GENERATION MIGRATION AND ACCUMULATION OF HYDROCARBON IN THE BERKINE BASIN EASTERN ALGERIA Abstract 1 N. YAHI 1 2 R.G. SCHAEFER² and R. LITTKE 3 1 Sonatrach Exploration Division Avenue du 1er Novembre 35000 Boumerdes Algeria 2 Institute of Petroleum and Organic Geochemistry Department of Chemistry and Dynamics of the Geosphere Research Center Jülich 3 Institute of Geology and Geochemistry of Petroleum and Coal Aachen University of Technology Current hydrocarbon production in the Berkine Basin is from reservoirs of Triassic age. As Paleozoic reservoirs are often very deep exploration has concentrated on the Triassic play. Hydrocarbons
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Polish Rotliegend Basin - Prospects of New Gas Play Discoveries
Authors A. Protas, K. Kwolek, M. Malaga and T. WolnowskiP515 POLISH ROTLIEGEND BASIN – PROSPECTS OF NEW GAS PLAY DISCOVERIES 1 K. KWOLEK M. MALAGA A. PROTAS and T. WOLNOWSKI Polish Oil & Gas Company Ltd. Geological Bureau – GEONAFTA Sq. Staszic 9 64-920 Pila Poland The Polish Rotliegend Basin (PRB) becomes the eastern part of the European sedimentary basin continuing from England through Holland Denmark northern Germany to The PRB occupies the central and northern Poland area and locates onto the Paleozoic platform. This basement is dominated by folded and low metamorphosed rocks of the Lower Paleozoic (Variscides Carboniferous – Devonian in age) but only in its north-eastern
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Seismic Pre-Drill Pore Pressure Imaging Using a Deepwater Rock Model
Authors N.C Dutta, M. Khan and S. GelinskyP516 SEISMIC PRE-DRILL PORE PRESSURE IMAGING USING A DEEPWATER ROCK MODEL Abstract 1 Deepwater drilling is expensive and can be risky if it is not well prepared. Proper well planning requires reliable estimates of the expected pore fluid pressure and formation strength prior to drilling. Such pressure predictions are based on integrated seismic and offset well data. A new rock model-based approach especially suited for deepwater pore pressure imaging is introduced here and applied in an example of a deepwater Gulf of Mexico well. P- and S- velocities were determined both at an offset well and for the future drilling
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New Aspects to Vertical Gas Migration Zones in the Northern Part of West Siberia
More LessP517 NEW ASPECTS OF VERTICAL GAS MIGRATION ZONES IN THE NORTHERN PART OF WEST SIBERIA R.M. GATAULIN Basheneftegeofizika 3 Luganskaya Ufa 450071 Bashkortostan Russia Summary 1 Many various hypotheses of hydrocarbon genesis and accumulation in super giant gas/condensate/oil fields in the northern part of West Siberia (the Yamburg gas/condensate field for example) are well known. Generally all research was related to shallow Aptian-Albian-Cenomanian (Pokur Formation) reservoirs. Some scientists regard aspects of: biogenic mechanism (CO2 reduction) or low maturity thermogenic model or both together. Others suggest deep origin of Cenomanian gas from Jurassic Triassic and Upper Paleozoic source rock. Author supports
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New and Mature Carbonate Plays Revive Exploration in Albania
Authors P. Seifert, Z. Bega and A. BallauriP518 NEW AND MATURE CARBONATE PLAYS REVIVE EXPLORATION IN ALBANIA Summary Part of the oil found in Albania until now was produced from carbonate reservoir plays. New carbonate play types got developed through the use of Satellite Image interpretation balancing cross sections and petroleum systems modelling. Together with the interpretation of new geophysical data the future exploration potential is highlighted in this paper 1 PETER SEIFERT ZAMIR BEGA and ADRIAN BALLAURI OMV Albanien. Rr. ‘P. Bogdani“ No. 36 Tirana Albania Introduction Since the early 1930‘s exploration for hydrocarbons took place in Albania. About 3.1 billion barrels oil and 140 BCF
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Reservoir Sweet Spots Identified with Surface Geochemistry - an Example from the Cambrian Pietu Siupariai Oil Field, Lithuania
Authors T.M. Haselton and P. WillumsenP521 RESERVOIR SWEET SPOTS IDENTIFIED WITH SURFACE GEOCHEMISTRY – AN EXAMPLE FROM THE CAMBRIAN PIETU SIUPARIAI OIL FIELD LITHUANIA T. HASELTON 1 and P. WILLUMSEN 2 1 1 UAB Minijos Nafta PO Box 12 Gamyklos g. 11 5840 Gargzdai Lithuania 2 Wexco Summary A surface geochemical survey was conducted over the ca. 2 000 m deep Cambrian Pietu Siupariai oil field Lithuania with the objective to identify reservoir sweet spots within the closing contour. For that purpose a total of 99 absorbing field modules (GORE-SORBER® modules) were placed in a 250 by 500 m grid within a 20 Km 2
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Controls on the Distribution and Thickness of Permian Basal Upper Rotliegend Sandstones, the Netherlands - Probing the Limits of the Rotliegend Play Area
Authors M.C. Geluk and H. MijnlieffP522 CONTROLS ON THE DISTRIBUTION AND THICKNESS OF PERMIAN BASAL UPPER ROTLIEGEND SANDSTONES THE NETHERLANDS – PROBING THE LIMITS OF THE ROTLIEGEND PLAY AREA MARK GELUK and HARMEN MIJNLIEFF Netherlands Institute of Applied Geoscience TNO- National Geological Survey PO Box 80015 3508 TA Utrecht The Netherlands Abstract 1 Two areas at the margin of the Rotliegend play area have been investigated in detail to obtain better insight in the distribution and thickness pattern of the basal Rotliegend sandstones. The study was mainly based on well data and 2D and 3D seismic data. Conclusions from this study are that the variations
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Sedimentary Cycles Are Key to Improve Reservoir Performance in Carbonates (Triassic Lower Muschelkalk), De Wijk Gas Field, the Netherlands
Authors J.C.P. Pipping, T. Carlson, H.W. Frikken and P.M. VallingaP523 SEDIMENTARY CYCLES ARE KEY TO IMPROVE RESERVOIR PERFORMANCE IN CARBONATES TRIASSIC LOWER MUSCHELKALK – DE WIJK GAS FIELD THE NETHERLANDS J.C.P. PIPPING 1 T CARLSON 2 H.W. FRIKKEN 1 and P.M. VALLINGA 1 Summary 1 1 Nederlandse Aardolie Maatschappij Asset Land East PO Box 28000 9400 HH Assen The Netherlands 2 Shell International Exploration and Production The De Wijk gas field was discovered in 1949 and commercial gas production started in 1955. The field is unique in the Netherlands as it contains gas in a series of reservoirs ranging from Tertiary to Carboniferous. The GIIP (Gas Initially In Place)
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1000 M Long Gas Blow-Out Pipes
Authors H. Løseth, L. Wensaas, B. Arntsen, N. Hanken, C. Basire and K. GraueP524 11000 M LONG GAS BLOW-OUT PIPES H. LØSETH 1 L. WENSAAS 1 B. ARNTSEN 1 N. HANKEN 2 C. BASIRE 1 and K. GRAUE 3 1 1 Statoil R&D Centre 7005 Trondheim Norway 2 University of Tromsø 3 Statoil Int. Summary A cluster of approximately 100 relative large craters (from 100 m to 500 m in diameter) exists at seabed over a 65 km 2 area offshore Nigeria. Cone structures interpreted as diatrems and underlying vertical pipes are observed on seismic data below the craters. The pipes can be traced continuously from seabed and 1000 to 1300 m down
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Hyperspectral Detection of Hydrocarbon Microseepage in the Santa Barbara Area, CA
Authors H. Van der Werff, F. van der Meer and P. van DijkP525 HYPERSPECTRAL DETECTION OF HYDROCARBON MICROSEEPAGE IN THE SANTA BARBARA AREA CA 1 H. VAN DER WERFF 1 F. VAN DER MEER 2 and P.VAN DIJK 1 1 ITC Division of Geological Survey PO Box 6 7513 AA Enschede The Netherlands 2 Delft Technical University Department of Applied Earth Sciences Introduction Oil and gas reservoirs leak. Hydrocarbon seepages are hydrocarbons leaking to the surface through their seal rocks while (hydrocarbon) microseepages are seeping (invisible) light hydrocarbons that can only chemically be detected at the surface. Studying surface occurrences of microseepages onshore may be a prospective tool for oil and gas
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The Corrib Field - Impact of 2D, 3D and PreSDM Seismic Data on the Structural Interpretation
By P.N. DancerP526 THE CORRIB FIELD – IMPACT OF 2D 3D AND PRESDM SEISMIC DATA ON THE STRUCTURAL INTERPRETATION P.N.DANCER Enterprise Energy Ireland Ltd. 4 th Floor Embassy House Herbert Park Lane Ballsbridge Dublin 4 Republic of Ireland Abstract 1 The interpretation of seismic data is a non-unique exercise dependant on the type and quality of data available as well as the skill and imagination of the seismic interpreter. This paper describes the impact of the various seismic datasets on the changes to the structural interpretation of the Corrib Gas Field. The early exploration maps using poor quality 2D data defined the
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Karachaganak Field - Phase Behavior of Oil-Gas-Condensate System
Authors L. Anissimov and G. BylinkinP527 KARACHAGANAK FIELD – PHASE BEHAVIOR OF OIL-GAS-CONDENSATE SYSTEM 1 LEONID ANISSIMOV 1 and GENNADY BYLINKIN 2 1 VolgogradNIPImorneft Lenin Av. 96 400005 Volgograd Russia 2 NV NIIGG Karachaganak Field is located on the northern margin of the basin and was discovered in 1979. The main hydrocarbon accumulation is in Upper Paleozoic carbonate formations of reef origin. The productive reservoir is 16*29 km in size and 1700 m in height. The top of the reservoir has been found at 3526 mss the gas-oil contact at 4950 mss and oil-water contact at 5150 mss. The great volume of reservoir the complex
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Contribution of 3D Seismic to Knowledge on Gbely Oil Fields in Slovak Part of the Vienna Basin
Authors J. Zelman, M. Pereszlenyi and R. VitalosP528 CONTRIBUTION OF 3D SEISMIC TO KNOWLEDGE ON GBELY OIL FIELDS IN SLOVAK PART OF THE VIENNA BASIN 1 J. ZELMAN M. PERESZLENYI and R. VITALOS Slovak Gas Industry Votrubova 11/A 82505 Bratislava The Slovak Republic Gbely fields are oldest known and producing oil fields in the Slovak territory. These fields are located in the north-eastern part of the Vienna Basin in the West Slovakia (Fig. 1). EAGE 63rd Conference & Technical Exhibition — Amsterdam The Netherlands 11 - 15 June 2001 2 This area can be divided into a few fields: Old field New field A-field B-field Ciganske field
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Structural and Stratigraphic Seismic Interpretation of the Socororo Field, Anzoategui State, Venezuela
By J.G. PintoP529 STRUCTURAL AND STRATIGRAPHIC SEISMIC INTERPRETATION OF THE SOCORORO FIELD ANZOATEGUI STATE VENEZUELA JONNY G. PINTO 1. - SUMMARY 1 This paper presents the results of the structural and stratigraphic interpretation of the integration of 400 linear km of 2D seismic and 20 sq. km of newly acquired 3D seismic data. The area is located 10 km east of Pariaguan City in Anzoategui State east of Venezuela. Fig.1. The work involved seismic geology and petrophisic information as well as a different number of available software in an attempt to resolve the structural and stratigraphic framework in the area. At the
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Study in the Development of Main Dolomite (Ca2) in Western Poland in the Aspect of Hydrocarbons Search
Authors L. Pikulski, T. Wolnowski and J. Zielinska-PikulskaP530 STUDY IN THE DEVELOPMENT OF MAIN DOLOMITE (Ca2) IN WESTERN POLAND IN THE ASPECT OF HYDROCARBONS SEARCH 1 The area in question has been intensively analysed in geological and seismic terms. It is situated on two separate tectonic units that are defined and limited in different ways in literature. It may be stated that in geological terms the area comprises the most south-east protruding part of Szczecin Synclinorium. At the end of it a regional strike of tectonic displacement and layers of permian – mezozoic elevations connected with it and called Gorzów Region are to be found. The drilling
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The Deep-Water Part of South Caspian Basin - Anticipation of Gas-Dominated Hydrocarbon Resources
Authors A.A. Feyzullayev and M.F. TagiyevP541 THE DEEP-WATER PART OF SOUTH CASPIAN BASIN – ANTICIPATION OF GAS_DOMINATED HYDROCARBON RESOURCES A.A. FEYZULLAYEV and M.F. TAGIYEV Azerbaijan Academy of Sciences Geology Institute H. Javid avenue 29A 370143 Baku Azerbaijan 1 Disclosure and use of oil as a combustible in Azerbaijan have a long history owing to wide occurrence of its natural seepages on the surface. Since the late 19 th. century due to not deep occurrence of the accumulations in Absheron Peninsula oil was produced from shallow hand dug wells (to 30 m). The first in the world well drilled here in 1848 gave impetus to development
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Hydrocarbon Potential of the Caspian Region
By H. RempelP542 HYDROCARBON POTENTIAL OF CASPIAN REGION HILMAR REMPEL Introduction 1 After the disintegration of the Soviet Union in 1991 and the emergence of a series of sovereign states out of former Soviet Republics the "Caspian Region" moved more strongly into the focus of international political and economic interest due to the exposed strategic position of this region and its huge hydrocarbon resource potential. This potential is quite significant and could play an important role in the future supply of oil and gas to European and Asian markets. Caspian region in current understanding comprises the littoral states of the Caspian Sea
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The Recent Volga Delta as an Analogue for the Productive Series in the South Caspian Basin
Authors S.B. Kroonenberg, M.D. Simmons, I. Overeem, D. Hinds, E. Aliyeva, A.A. Svitoch and G.V. RusakovP543 THE RECENT VOLGA DELTA AS AN ANALOGUE FOR THE PRODUCTIVE SERIES IN THE SOUTH CASPIAN BASIN The Pliocene Productive Series in the South Caspian Basin Azerbaijan The South-Caspian basin is one of the oldest productive hydrocarbon provinces in the world but also one of the most unusual ones due to the extreme youthfulness of the source rocks and reservoir rocks low geothermal gradient (15°/km) and the extreme depth of the oil window (below 6.5 km). All this is related to the exceedingly high subsidence rate of the basin and the very high sedimentation rate of its filling. The main
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Romashkino Oil Field (Volga-Ural Basin) - New Formation Model
Authors E.A. Ablia, B.A. Sokolov and F.N. KhairutdinovP544 ROMASHKINO OIL FIELD VOLGA-URAL BASIN – FORMATION MODEL E.A. ABLIA B.A. SOKOLOV and F.N. KHAIRUTDINOV Geology faculty of Moscow State University Vorobiovy gory 119899 Moscow Russia 1 Multiformity of hydrocarbons generation and especially accumulation processes raise many problems. It is well known that some of oil fields located in basal layers of sedimentary cover of platforms (West Siberia) or directly in the basement rocks (White Tiger in Vietnam). Also there are many fields (usually with a gigantic supply) in the lower layers of sedimentary cover that is underlain by a basement. The most famous examples are fields of Nepa-Botuoba
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Deep Sources of Hydrocarbon Formation in the South Caspian Oil-Gas Bearing Basin
Authors I. Guliyev and E. AliyevaP545 DEEP SOURCES OF HYDROCARBON FORMATION IN THE SOUTH CASPIAN OIL-GAS BEARING BASIN IBRAGIM GULIYEV and ELMIRA ALIYEVA Azerbaijan Academy of Sciences Geology Institute H. Javid avenue 29A 370143 Baku Azerbaijan 1 Introduction South Caspian basin is considered to be one of the richest and oldest oil-gas producing areas in the world. High rates of sedimentation being of avalanche sedimentation nature at some stages of basin evolution up (to 2 5 km/Ma in Low Pliocene) led to the formation of thick sedimentary series reaching 25-30 km in central deep-seated part of basin.. Due to abnormally rapid sedimentation and formation of
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About Nature and Stratum Occurrences of Gas-Hydrates Hydrocarbon Gases in the Caspian Sea
Authors R. Javadova, C. Muradov and A. FeizulayevP561 ABOUT NATURE AND STRATUM OCCURRENCES OF GAS-HYDRATES HYDROCARBON GASES IN THE CASPIAN SEA 1 Hydrocarbon composition's gas-hydrates is formed mainly in cryosphere and bottom sediments of the seas and oceans. The recent thermodynamic conditions of a sedimental cover of the earth crust as have shown researches are favorable for formation and preservation of solid gas-hydrates approximately on the 25% of territory of a land and 90% of the World ocean water area where thickness of gas-hydrates zone of formation can reach several thousands meters. A special interest represent mediterranean seas characterizing by a thick sedimentary series and high oil-gas
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A New Experimental Set-Up for the Study of the Formation and Dissociation of Methane Hydrate in Sédiments
Authors J.-M. Herri, O. Bonnefoy, J.P. Monfort, P. Henry, P. Bernada and R. OhmuraP562 A NEW EXPERIMENTAL SET-UP FOR THE STUDY OF THE FORMATION AND DISSOCIATION OF METHANE HYDRATE IN SÉDIMENTS Abstract This work is sponsored by TotalFinaElf IFREMER IFP GDF and CNRS 1 In this paper we give a short presentation of the project ForDiMHyS which consists of experimental studies and model establishment (or development) of the kinetics of FORmation and Dissociation of Methane Hydrates in Sediments. We focus on the details of the experimental set-up which is newly specially designed for this study in the preliminary step of the project. The four French academic teams and two Ph.D. theses are involved
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Seismic Images of Structures Associated with Gas Hydrates near the Sea Floor - Initial Results
Authors T.M. McGee, C.B. Lutken, V.S. Goebel and J.R. WoolseyP563 SEISMIC IMAGES OF STRUCTURES ASSOCIATED WITH GAS HYDRATES NEAR THE SEA FLOOR – INITIAL RESULTS 1 THOMAS M. MCGEE 1 CAROL B. LUTKEN 1 VAUGHN S. GOEBEL 2 and J. ROBERT WOOLSEY 1 1 Center for Marine Resources and Environmental Technology The University of Mississippi 220 Old Chemistry Building Mississippi MS 38677 USA 2 Lookout Geophysical Company ABSTRACT Obtaining very-high-resolution seismic images of structures immediately below the sea floor in deep water is fraught with problems. The conventional approach has been to tow a subbottom profiler near the sea floor but if the water is a kilometre or more
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Possibility of Gas Hydrate Exploration Using Multispectral Thermal Infrared Imaging
More Less1 P564 POSSIBILITY OF GAS HYDRATE EXPLORATION USING MULTISPECTRAL THERMAL INFRARED IMAGING Y.-H. ZHU Z.-Q. LU and B.-H. WU Institute of Mineral Resources Chinese Academy of Geological sciences Baiwanzhuang Road 26 100037 Beijing China Abstract Gas hydrate is a solid phase of water and low-molecular weight gases (mostly methane) that forms at high pressures and low temperature. It has become the focus of international interest over the past few years because of its abundance and its potential importance as energy resources controlling factor of global climatic change and trigger of sea floor instability. Many geological geophysical and geochemical methods in
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Distribution of Bottom Simulating Reflectors (BSRs) and Gas Hydrates Off Costa Rica
Authors H. Meyer, B. Buttkus, S. Neben and C. BönnemannP565 DISTRIBUTION OF BOTTOM SIMULATING REFLECTORS (BSRS) AND GAS HYDRATES OFF COSTA RICA H. MEYER B. BUTTKUS S. NEBEN and C. BÖNNEMANN Bundesanstalt für Geowissenschaften und Rohstoffe Stilleweg 2 30655 Hannover Germany The convergent continental margin off Costa Rica is an area with large known gas hydrate occurrences. 1 At this margin BGR undertook in 1992 a 3D seismic survey and acquired 2D seismic lines during several cruises. One major aim of cruise BGR99 was to map the overall gas hydrate distribution as inferred from BSR occurrence along the convergent margin off Costa Rica and especially to collect high resolution
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Biogeochemical Cycle of Methane in Regions of Marine and Freshwater Methane Vents
Authors B.B. Namsaraev and O.P. DagurovaP566 BIOGEOCHEMICAL CYCLE OF METHANE IN REGIONS OF MARINE AND FRESHWATER METHANE VENTS B.B. NAMSARAEV and O.P. DAGUROVA Institute of General and Experimental Biology SB RAS Sakhyanovoi 6 670047 Ulan-Ude Russia 1 Introduction The gasohydrotherms with numerous gas infiltrations were found in the regions of volcanic activity in marine and freshwater ecosystems [1-4]. The main component of gases is methane. There are two pathways of methane appearance in the water reservoirs. The first is the process of the bacterial methane generation on the terminal stage of the anaerobic destruction of the organic matter. The second pathway is the methane entrance
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Experimental Measurement of Gas Hydrate Stability in Porous Media
Authors R. Anderson, R.W. Burgass, B. Tohidi and K.K. ØstergaardP567 EXPERIMENTAL MEASURMENT OF GAS HYDRATE STABILITY IN POROUS MEDIA 1 ROSS ANDERSON ROD W. BURGASS BAHMAN TOHIDI and KASPER K. ØSTERGAARD Centre for Gas Hydrate Research Department of Petroleum Engineering Heriot-Watt University Edinburgh EH14 4AS UK SUMMARY: New data for the stability zone of methane and CO2 hydrates in 82 Å diameter porous media are reported. The data is combined with that previously measured for 128 Å and 251 Å as part of an ongoing study of hydrate stability in porous media [Tohidi et al. 2000b] and a comprehensive correlation between pore size and hydrate inhibition is presented. The
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Visual Observation of Gas Hydrate Formation in Glass Micromodels
Authors R. Anderson, A.B. Biderkab, B. Tohidi and B. ClennellP568 VISUAL OBSERVATION OF GAS HYDRATE FORMATION IN GLASS MICROMODELS 1 1 1 1 2 ROSS ANDERSON A. B. BIDERKAB BAHMAN TOHIDI and M. BEN CLENNELL 1 Centre for Gas Hydrate Research Department of Petroleum Engineering Heriot-Watt University Edinburgh EH14 4AS UK 2 Centro de Pesquisa em Geofsica e Geologia – IGEO Universidade Federal da Bahia SUMMARY: A glass micromodel rig had been commissioned for use in the visual observation of gas hydrate formation and dissociation in porous media. The rig provides a unique opportunity for direct visual observation of phase behaviour at the microscopic scale. We report results on
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Ice Plug Formation During Gas Hydrates Dissociation in Strata
By G.G. TsypkinP569 ICE PLUG FORMATION DURING GAS HYDRATES DISSOCIATION IN STRATA GEORGE G. TSYPKIN Institute for Problems in Mechanics RAS Av. Vernadskogo 101 117420 Moscow Russia Summary 1 The new mathematical model of gas hydrate dissociation in strata with a positive initial temperature is investigated. It is shown that there exist four various regimes of hydrate decomposition. It is found that in high-permeable strata the ice saturation behind the dissociation front can reach large value. This phenomenon leads to a reduction in gas production. Introduction The growing demand for understanding and treating the process of gas extraction from hydrate saturated reservoirs
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Deep Water Exploration in Portugal - the Next European Bonanza?
Authors F. Sandnes, T.A. Hellem, R. Myklebust and Ø. MjøenP581 DEEP WATER EXPLORATION IN PORTUGAL – THE NEXT EUROPEAN BONANZA? Abstract Summary 1 New basins (or sub-basins) with substantial sediment thickness have been identified and previously identified but poorly defined basins have been firmed up. All of the studied basins appear to contain the factors necessary for effective petroleum systems. Giant potential is envisaged in this frontier area. Few “ virgin areas” like these are left at the doorstep of the major European oil and gas market. Extensive exploration activity is anticipated in the deep waters offshore Portugal in the near future. Interpretation of the first portion of a
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Pleistocene to Pliocene Turbidite Systems in the Gulf of Mexico, Viosca Knoll Area - Relations between Tectonic Deformation, Architectural Evolution and Sedimentation from the Shelf to the Basin
Authors M. Puig, M. Dall‘Asta, A. Ortin and J. VittoriP582 PLEISTOCENE TO PLIOCENE TURBIDITE SYSTEMS IN THE GULF OF MEXICO VIOSCA KNOLL AREA – RELATIONS BETWEEN TECTONIC DEFORMATION ARCHITECTURAL EVOLUTION AND SEDIMENTATION FROM THE SHELF TO THE BASIN M. PUIG 1 2 M. DALL’ASTA 2 A. ORTIN 3 and J. VITTORI 2 Abstract 1 1 Faculty of Geology University of Barcelona C/ Marti i Franquès s/n 08028 Barcelona Spain 2 TOTALFINAELF Exploration 3 ENSPM (IFP) Sediment deposition in the Gulf of Mexico is controlled by tectonic activities (salt activity) climatic conditions (glaciation-deglaciation denudation) and long-term sea-level variations. During the Pleistocene the Mississippi delta was the main sediment source to
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Using Image Analysis to Quantify Textural Changes due to Post-Depositional Remobilization of Fine-Grained Sands
Authors R. Jonk, D. Duranti, A. Hurst and J. Parnell1 P583 USING IMAGE ANALYSIS TO QUANTIFY TEXTURAL CHANGES DUE TO POST- DEPOSITIONAL REMOBILIZATION OF FINE- GRAINED SANDS R. JONK D. DURANTI A. HURST and J. PARNELL Department of Geology and Petroleum Geology University of Aberdeen Aberdeen AB24 3UE UK Summary An image analysis method is used to describe textural changes caused by remobilization of very fine to medium grained sands. Image analysis on non-cemented injected sands shows that sands with high primary porosities (25-40%) get packed to give porosities below 20% due to remobilization. Calcite cementation in some reservoir-scale sandstone dykes causes them to loose any remaining porosity. Cementation
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The Turbiditic Systems of the Oligo-Miocene Numidian Flysch - a New Exploration Target in Northern Tunisia
Authors C. El Maherssi, M. Saidi and L. FouratiP584 THE TURBIDITIC SYSTEMS OF THE OLIGO- MIOCENE NUMIDIAN FLYSCH – A NEW EXPLORATION TARGET IN NORTHERN TUNISIA C. EL MAHERSSI M. SAIDI and L. FOURATI ENTREPRISE TUNISIENNE D’ACTIVITES PETROLIERES Exploration Studies Department 27 Bis Av. K. Pacha 1002 Le Belvedere Tunis Tunisia 1 In Northern Tunisia the maghrebian orogen is characterized by stacked up allochtonous and parautochtonous units or nappes verging toward the external zones and displaying various cretaceous-tertiary sedimentary siliciclastic and carbonate sequences. The numidian flysh corresponds to the highest structural unit of the maghrebian orogen (Fig-1-) displaced from NW to SE during Late Serravalian to Early Tortonian
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Influence of Geothermal Gradient on Methane Concentration in Ground Water
More LessP601 INFLUENCE OF GEOTHERMAL GRADIENT ON METHANE CONCENTRATION IN GROUND WATER MIHKEL SHTOKALENKO The All-Russian Scientific-Research Institute of Exploration Geophysics VIRG-Rudgeofizika Saint-Petersburg Russia 1 Methane is the main component of ground water gas composition below the depth of about 250 m where oxidation changes into reduction. The conditions of methane diffusion and solubility are important not only for hydrocarbon accumulation but also for upward migration of metals because ascending methane flow may be considered as a possible transport for many micro-components. Thus it may be promising to study the spatial distribution of dissolved methane within "cold" and "hot" areas of
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The Computer Technology for 3D Modeling of Complicated Geological Objects
Authors B.S. Busygin and S.L. NikulinP602 THE COMPUTER TECHNOLOGY FOR 3D MODELING OF COMPLICATED GEOLOGICAL OBJECTS B.S. BUSYGIN and S.L. NIKULIN Introduction 1 In this paper the new technology for the construction of 2D and 3D models of the geological bodies and structures diffuse haloes of geochemicals etc is described. The necessity of it creation is caused by the following: existing 3D modeling technology are based on all-purpose interpolation algorithm (such as kriging etc) which meanly take into account the particularities of complicated deposits of lode or layer type (presence of numerous breaks pinches low power of layers and lodes) doesn’t operate with data given
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3D Geometry of Polygonal Fault Patterns Formed by Multidirectional Gravitational Gliding in Analogue Experiments
Authors P. Victor and I. MorettiP603 3D GEOMETRY OF POLYGONAL FAULT PATTERNS FORMED BY MULTIDIRECTIONAL GRAVITATIONAL GLIDING IN ANALOGUE EXPERIMENTS P. VICTOR and I. MORETTI Abstract 1 Analogue experiments have been carried out to understand the deformation of the sandy channel traps in a shale prone sedimentary pile on passive margins where 3D gravitational gliding is active such as the Congo-Zaire delta. Results show that the channel will be boudinaged and therefore dismembered during the flow of the ductile material. Faults in the channel interior form always perpendicular to its borders and are not influenced by the regional slope. On the other hand the presence
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Geomechanical Modelling of the Induced Seismicity for a Gas Field
Authors B. Orlic, R. van Eijs and B. ScheffersP604 GEOMECHANICAL MODELLING OF THE INDUCED SEISMICITY FOR A GAS FIELD Abstract 1 Gas production from a reservoir may lead to reactivation of nearby faults which is likely to cause local seismic events. This paper is focusing on the calculations of stress evolution during depletion of a gas reservoir in order to investigate the possibilities for the reactivation and slip on normal faults thrust faults and bedding planes at the contact between reservoir and overburden. The program DIANA was used for finite element calculations for a gas field under consideration. Several calculation were run with various initial stress regimes and
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Modelling of Complex Lateral Variations in Fold-Thrust Belts - Taranaki Basin, New Zealand
Authors A.L. Halladay, D.C. Lawton and D.A. SprattP605 MODELLING OF COMPLEX LATERAL VARIATIONS IN FOLD-THRUST BELTS – TARANAKI BASIN NEW ZEALAND Summary 1 A 2-D seismic data set from the Tarata Thrust Zone in the Taranaki Basin New Zealand is used to constrain an interpretation in an area of structural complexity that exhibits considerable alongstrike variation in displacement and geometry. Displacement transfer between two oppositely verging thrust faults is interpreted to be accommodated by an obliquely striking lateral ramp terminated at its southern end by a tear-fault. A 3-D digital representation of the structural geometry was constructed in GoCAD and used as a basis for numerical seismic
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Two-Dimmensional Model of Burial and Thermal History of the Czech Upper Silesian Basin
By J. FrancuP606 TWO-DIMMENSIONAL MODEL OF BURIAL AND THERMAL HISTORY OF THE CZECH UPPER SILESIAN BASIN JURAJ FRANCU Summary 1 The evolution of the Variscan foreland basins below the West Carpathian overthrust and foredeep is simulated using a two-dimmensional model of burial erosional and thermal history. The principle question is which tectono-sedimentary units were exposed to thermal stress as a continuous pile and which were thrust over other units as allochthonous bodies uplifted from another places of burial. Analysis of coalification gradients provides a quantitative basis for calibration of the interplay between palaeo-heat flow and maximum burial depth. The trends of coalification
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Salt Cementation of Reservoir Rocks near Salt Domes in the Netherlands North Sea Area - a New Mechanism
Authors F. Van Bergen and C.S. de LeeuwP607 SALT CEMENTATION OF RESERVOIR ROCKS NEAR SALT DOMES IN THE NETHERLANDS NORTH SEA AREA – A NEW MECHANISM 1 F. VAN BERGEN and C.S. DE LEEUW Netherlands Institute of Applied Geoscience TNO – National Geological Survey Department of Geo-Energy PO Box 80015 3508 TA Utrecht The Netherlands Abstract A new mechanism is proposed to explain observed salt plugging of reservoirs adjacent to salt domes in the Netherlands North Sea. Temperature modeling showed that distortion of temperature gradients takes place around salt domes. The combination of this distortion within the local geological setting could result in temperature-driven precipitation and subsequent
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Factors Controlling Quartz Cementation of Cambrian Reservoir Sandstones of Lithuania
Authors S. Sliaupa, L. Lashkova, V. Rasteniene and J. CyzieneP608 FACTORS CONTROLLING QUARTZ CEMENTATION OF CAMBRIAN RESERVOIR SANDSTONES OF LITHUANIA 1 S. SLIAUPA L.LASHKOVA V. RASTENIENE and J.CYZIENE Institute of Geology Sevcenkos 13 2600 Vilnius Lithuania Summary Numerous oil fields are hosted by Cambrian siliciclastics of western Lithuania. The reservoir properties are primarily controlled by secondary quartz cementation. Its distribution shows regional-scale depth-dependent trend while local variations in western Lithuania are drastic and as yet not well understood. Temperature and formation water chemistry significantly contributed to the quartz cementation in regional scale. In local scale sin-depositional features (sand-clay fraction sorting) played important role leading to differentiation of water-film-diffusion (WFD)
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3D Geomechanical Modeling of a Faulted Oil Field
Authors I.A. Garagash, E.A. Kozlov, V.N. Haydukov, V.V. Makarov and T.N. MalyarovaP609 3D GEOMECHANICAL MODELING OF A FAULTED OIL FIELD SUMMARY The 3D technique of geomechanical modeling and paleogeomechanical restoration is presented. As compared to 2D version developed recently it allows a more comprehensive characterization of reservoir tectonics as well as spatial distribution of the zones of intense fracturing and their evolution in geologic time. Implementation of the technique on a series of oil fields in the Northern Priob’e (West Siberia Russia) along with AVO analysis and basin modeling has provided for better understanding of the oil accumulation origin and helped delineate the most productive part of the oil reservoir more
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Modelling Mass Movements along Cenozoic Delta Lobes, 3D Seismic Data Analysis of the F09 Block, North Sea
Authors I. Overeem, G.G. Drijkoningen, T.P.H. Steeghs and B.D. van de BiltP610 MODELLING MASS MOVEMENTS ALONG CENOZOIC DELTA LOBES 3D SEISMIC DATA ANALYSIS OF THE F09 BLOCK NORTH SEA 1 1 2 3 4 I. OVEREEM G.G. DRIJKONINGEN T.P.H. STEEGHS and B.D. VAN DE BILT 1 Department of Applied Earth Sciences Delft University of Technology PO Box 5028 2600 GA Delft The Netherlands 2 Department of Applied Geophysics Delft University of Technology 3 TNO Physics and Electronics Laboratory Radar Concepts & Signal Processing 4 PANTERRA Introduction 3D seismic data provides an opportunity for geologists to study plan-view data of paleo-sedimentary systems (Reymond and Stampfli 1994 Gregersen 1998 Yarus et al 2000).
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Geostatistical Modelling of Petrophysical Data of Oil Fields in the Northern Croatia
Authors T. Malvic, Z. Hernitz and N. BokorP611 GEOSTATISTICAL MODELLING OF PETROPHYSICAL DATA OF OIL FIELDS IN THE NORTHERN CROATIA Z. HERNITZ 1 N. BOKOR 2 and T. MALVIC 1 by faults (FIGURE 2). EAGE 63rd Conference & Technical Exhibition — Amsterdam The Netherlands 11 - 15 June 2001 1 1 Faculty of Mining Geology and Petroleum Engineering Pierottijeva 6 10000 Zagreb Croatia 2 INA- Industry of Oil Inc. INTRODUCTION The input parameters were porosity and permeability. They were analyzed through the semivariogram analysis as a suitable geostatistical tool for the presentation of regionalized variables. The aim of the exploration was to learn the regularities or irregularities
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Modelling of Fluvial Deposits and Their Transient Well Test Responses
Authors L. Barens and P. CorbettP621 MODELLING OF FLUVIAL DEPOSITS AND THEIR TRANSIENT WELL TEST RESPONSES Abstract 1 The hydrocarbon bearing sandstones of fluvial reservoirs are deposited by rivers. Here we present a method of modelling point bar deposits by modelling the last stage of the meandering river path before abandonment. The point bars are inserted inside the bend of the path. After abandonment of the river path the channel is gradually filled with heterolithic sediments. These sediments form a baffle to flow through the deposited channel belt. The effective permeability contrast on the well test pressure transient between the point bar sediments and the
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The Huesca Project - Integrated Modelling of Labyrinth-Type Fluvial Reservoir Architecture
More LessP622 THE HUESCA PROJECT – INTEGRATED MODELLING OF LABYRINTH-TYPE FLUVIAL RESERVOIR ARCHITECTURE M.E. DONSELAAR Abstract 1 Dep. of Applied Earth Sciences Delft University of Technology PO Box 5028 2600 GA Delft The Netherlands The modelling of complex reservoir architecture i.e. the spatial distribution of reservoir and non-reservoir sediments has made large strides with the maturation of computer power and the development of sophisticated modelling software packages. More or less realistic sediment body shapes are used net bulk volume connected volume and flow paths can easily be visualised and calculated. The reservoir models are constrained by well and log data and
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Analogue Modelling of the Permian Cutler SST, Problems and Solutions
Authors C.A. Visser and H. DronkertP623 ANALOGUE MODELLING OF THE PERMIAN CUTLER SST PROBLEMS AND SOLUTIONS Abstract 1 This paper investigates the possibilities and impossibilities of analogue modelling. The conclusions are based on a long experience in various areas and fields. This paper only discusses the analogue modelling of aeolian and fluvial sandstones of the Permian Cutler Formation in Utah (USA) as an analogue for the Rotliegend gas fields in NW Europe. Both geometrical and petrophysical data were measured and analysed. It appears that careful geometry measurements are very useful for reservoir modelling. Porosity and permeability measurements from outcrops need to be processed extensively to
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Characterization and Production Forecasting of Shoreface Reservoirs Through Process-Based Modelling
By C.R. GeelP624 CHARACTERIZATION AND PRODUCTION FORECASTING OF SHOREFACE RESERVOIRS THROUGH PROCESS-BASED MODELLING C.R.GEEL Introduction 1 Assessment of the uncertainty in production forecasting of an existing oil field is usually done by performing reservoir simulations of a number of stochastic realizations. The parameters of these realizations vary around base case values that are obtained by matching the reservoir simulator output to the field’s production history. This approach has been extensively studied and documented in the last 15 years (see e.g. Lia et al 1997). There are some problems with this approach however. Practically no commercially available stochastic modelling software is able to
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Prediction of Production Features on Proni-Filtration Results
Authors A.V. Zhidkov, A.M. Brekhuntcov, J.M. Ilein and G.M. MitrofanovP625 PREDICTION OF PRODUCTION FEATURES ON PRONI-FILTRATION RESULTS Summary 1 A new tool for estimating of target horizons production zones on the bases of Pronifiltration method is here presented. The tool allows us to locate zones of anomalous seismic attenuation (depending on frequency) which are connected with target seismic horizons. Analysis of these zones permits to better understand features of production horizons and to correlate these features with presence of perspective reservoirs. The approach was tested on a one complex deposit from the western Siberian region. Introduction Effectiveness and expediency of the technique suggested for obtaining the additional information about
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Facture Origin, Morphology and Reservoir Performance Improvement - Example of the Maastrichtian Chalky Limestones in Tunisia
Authors H. Troubi, H. El Euchi and P. TremolieresP626 FRACTURE ORIGIN MORPHOLOGY AND RESERVOIR PERFORMANCE IMPROVEMENT – EXAMPLE OF THE MAASTRICHTIAN CHALKY LIMESTONES IN TUNISIA 1 HABIB TROUDI 1 HASSEN EL EUCHI 1 and PAUL TREMOLIERES 2 1 ETAP 27 bis Av. Khéreddine Pacha 1002 Tunis Tunisia 2 Consultant Introduction Because of the drastic increase in oil/gas discoveries where natural fractures play an important role in production (North sea Middle east USA North Africa …) focus on fracture studies with an ultimate goal of fracturing on subsurface fluid flow and subsequent reservoir performance is of paramount importance in the reservoir evaluation and management. This interest manifested itself by
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Seismic Edge Detection Using Generalized Hilbert Transform
Authors Y. Luo, S. Al Dossary and M. MarhoonP627 SEISMIC EDGE DETECTION USING GENERALIZED HILBERT TRANSFORM Abstract 1 We introduce a new algorithm DETECT for highlighting discontinuities such as faults and channels in 3D seismic data sets. Based on a novel generalized Hilbert transform (GHT) the DETECT algorithm is capable of capturing subtle changes in recorded seismic wavefields. Results produced by DETECT are of higher resolution than those obtained by other leading commercial packages. Introduction Faults and channels could manifest themselves by abrupt or gradual changes in 3D seismic data. When changes are abrupt there are several published edge-detection methods such as coherence cube (Bahorich and Farmer 1995)
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Real-Time Monitoring and Control - a Laboratory Demonstration
Authors B. Raghuraman, M. Supp, I Bryant and F. AuzeraisP641 REAL-TIME MONITORING AND CONTROL: A LABORATORY DEMONSTRATION Introduction 1 Real-time monitoring and control using advanced completion systems have been applied to injection and production from a heterogeneous laboratory-scale reservoir. Permanent pressure and flow sensors in each zone of two segmented wells provide continuous feedback that allows computation of progressively better models of the formation between the wells as indicated by decreasing deviations between model predictions and observations. At each stage an optimum control strategy is implemented by acting on the control valves in the completions of both the production and injection wells. The experiment demonstrates that advanced completions may
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Improved Mapping of Basement Using Two Types of Log Estimations
Authors P.T.R. De Beukelaar, M. Browne, B. Finlayson, P. Strauss and P. TarabbiaP642 IMPROVED MAPPING OF BASEMENT USING TWO TYPES OF LOG ESTIMATION PAUL DE BEUKELAAR 1 MARK BROWNE 2 BRUCE FINLAYSON 2 PETER STRAUSS 2 and PAUL TARABBIA 2 1 Solegeo Sarl Reservoir Characterization Studies 28 rue des Tartres 92500 Rueil-Malmaison France 2 Santos Ltd. Australia Introduction Picking the top of basement beneath the thick fluvial/deltaic sediments of the Cooper/Eromanga Basins in South Australia has proven to be difficult in recent years. Firstly it was important to implement a set of criteria to recognise basement lithologies on wireline logs from similar log character responses obtained for overlying sediments. Of great assistance
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Downhole Magnetic Stratigraphy in Solving Problems of Correlation of Heterofacial Strata, Sequence - Stratigraphy for Oil Fields Modelling, Technology of Operations, Instrumentation
Authors L.G. Filippycheva, A.I. Burakov, A.I. Bogdanovich, I.P. Belyaev and A.B. GutnerP643 DOWNHOLE MAGNETIC STRATIGRAPHY IN SOLVING PROBLEMS OF CORRELATION OF HETEROFACIAL STRATA SEQUENCE- STRATIGRAPHY FOR OIL FIELDS MODELLING TECHNOLOGY OF OPERATIONS INSTRUMENTATION 1 L.G. FILIPPYCHEVA A.I. BURAKOV A.I. BOGDANOVICH I.P. BELYAEV and A.B. GUTNER VIRG-Rudgeofizika Fayansovaya 20 193019 St.Petersburg Russia Abstract 1. In studies of the structure regularities of strata – oil reservoirs ("traps" of the stratigraphic type) composed by terrigenous and carbonate rocks and in their correlation along with the lithological composition and morphology of complexes a particular attention should be given to sedimentation signatures (detailing of stratigraphic and facial relations detection of break moments in sedimentation processes of
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Application of Fractal Approach and Microscopic Images in Net Model of Pore Space
Authors P. Such and G. LesniakP644 APPLICATION OF FRACTAL APPROACH AND MICROSCOPIC IMAGES IN NET MODEL OF PORE SPACE P.SUCH and G.LEŚNIAK Oil and Gas Institute Ul. Lubicz 25a 31-503 Krakow Poland 1 Summary A pore space consists of relatively large chambers (pores) and a net of thin channels which connects pores and enables a flow of reservoir fluids. It is impossible to describe analytically that process. Therefore it is necessary to introduce mathematical models that can parameterize the pore space properly. The proper parameters of reservoir rocks (porosity permeability) ought to be calculated with the use of microparameters of the pore space. The net
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Well Dynamic Fracturing by Pressure Pulses
More LessP645 WELL DYNAMIC FRACTURING BY PRESSURE PULSES DAVID W. YANG 1 and RASMUS RISNES 2 Abstract 1 A new experimental set-up has been developed which can be utilised to study the dynamic fracturing by pressure pulses. The set-up employs a falling weight to impact on a piston that compresses the borehole fluid and transmits dynamic pressurisation to the simulated wellbore. The fracture pattern can directly be observed and examined after the impacting test. Altogether 63 tests have been conducted by using the developed set-up. Experimental results have proven a critical pressurisation rate at which multiple fractures begin to evolve. The
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Can Production Performance Be Related to Geological Complexity?
Authors C.F.M. Bos, P.J.P. Egberts and M. NepveuP646 CAN PRODUCTION PERFORMANCE BE RELATED TO GEOLOGICAL COMPLEXITY? Abstract 1 C.F.M. BOS P.J.P. EGBERTS and M. NEPVEU Netherlands Institute of Applied Geoscience TNO PO Box 80015 3508 TA Utrecht The Netherlands An ongoing research project named Sensitivity Analysis of the Impact of Geological Uncertainties on Production forecasting in clastic hydrocarbon reservoirs (SAIGUP) addresses the question whether geological complexity can be parameterised and to what extent production performance given a Plan for Development and Operation can be related to such higher-order parameters. The project is partly funded by the European Commission’s 5 th Framework Programme. Other partners in the project
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Multidisciplinary Study of the Seismic Monitoring of Manosque-Geosel Hydrocarbon Leached Salt Caverns
Authors P.E. Renoux and S. Di GiandomenicoP661 MULTIDISCIPLINARY STUDY OF THE SEISMIC MONITORING OF MANOSQUE-GEOSEL HYDROCARBON LEACHED SALT CAVERNS 1 PATRICK RENOUX and SACHA DI GIANDOMENICO GEOSTOCK 7 rue E. et A Peugeot 92563 Rueil-Malmaison cedex France Summary Continuous seismic monitoring is performed at the Geosel Manosque hydrocarbons underground storage site. Data collected since 1992 are analysed : tentative correlations with petrophysical data cavern shape or operational data are presented. Conclusion is that internal shallow amplitude events can be mainly related to operational data. Introduction Located in the south of France and linked by pipeline to these refineries two chemical plants the petroleum part of Lavera
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Permanent Passive Seismic Monitoring at the Céré-la-Ronde Underground Gas Storage During Reservoir Fill-Up
Authors J.-P. Deflandre and F. HuguetP662 PERMANENT PASSIVE SEISMIC MONITORING AT THE CÉRÉ-LA-RONDE UNDERGROUND GAS STORAGE DURING RESERVOIR FILL-UP 1 J.-P. DEFLANDRE 1 and F.HUGUET 2 1 Institut Français du Pétrole 1-4 avenue de Bois-Préau 92852 Rueil-Malmaison France 2 Gaz de France Abstract This paper briefly reports the 3 first years of the permanent passive seismic experiment Gaz de France and Institut Français du Pétrole are currently performing on the Céré-la-Ronde underground gas storage facility. The measurements confirm the interest of using on-tubing Permanent Downhole Geophones to monitor the micro-seismic activity associated to gas storage and more generally for reservoir production. Low magnitude events (from
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4D Tomography at the North Sea
Authors A.L. Vesnaver, G. Dal Moro, G. Madrussani, I. Pajchel and G. RossiP-663 4D TOMOGRAPHY AT THE NORTH SEA . A. VESNAVER 1 G. DAL MORO 1 G. MADRUSSANI 1 J. PAJCHEL 2 and G. ROSSI 1 1 OGS Borgo Grotta Gigante 42/c 34010 Trieste Italy 2 Norsk Hydro Sandsliveien 90 5020 Bergen Norway Abstract Time-lapse analysis is a proven technology for optimising oil and gas production; similarly 3D tomographic imaging is the proper tool for reconstructing complex structures in depth. Here we combine these two approaches into a consistent processing strategy building a depth model that is time-variant at the reservoir and the seawater (or weathered layer) and constant elsewhere. We
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New 4D Seismic Tools for Carbonate Reservoirs
Authors L. Sønneland, M. Nickel and J. SchlafP664 NEW 4D SEISMIC TOOLS FOR CARBONATE RESERVOIRS M.NICKEL J. SCHLAF and L. SØNNELAND Abstract 1 Carbonate reservoirs are often significantly more demanding to explore and produce than siliciclastic reservoirs. The reasons for this are typically complex depositional facies with intense fracturing and diagenetic effects. Time-lapse seismic monitoring of carbonate reservoirs might identify subsidence and the flow properties of the fracture network which often make up migration paths for hydrocarbons or injector fluids. Knowing these dynamic components of the reservoir behavior helps the asset team to improve the management of the produced water and detect by-passed pay. In this paper
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Tracking Production Changes in a Turbidite Reservoir Using 4D Elastic Inversion
Authors A. McInally, J. Kunka, J. Garnham, T. Redondo-Lopez and L. Stenstrup HansenP665 TRACKING PRODUCTION CHANGES IN A TURBIDITE RESERVOIR USING 4D ELASTIC INVERSION ALAN MCINALLY 1 JOHN KUNKA 1 JENNY GARNHAM 1 TERESA REDONDO LOPEZ 1 Abstract 1 Elastic inversion of three time-lapse seismic data sets from the Nelson Field UKCS has been performed to aid in reservoir characterisation and the tracking of fluid changes within the reservoir due to production. Predicted Shear Impedance volumes and Acoustic Impedance volumes are used to delineate reservoir architecture due to their reduced fluid imprint. Poisson’s Ratio and Acoustic Impedance time-lapse volumes are combined to delineate oil and water filled sands and shales from the
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Monitoring Production Processes by 4D Multicomponent Seismic Surveys at Vacuum Field, New Mexico
Authors T.L. Davis and R.D. BensonP666 MONITORING PRODUCTION PROCESSES BY 4-D MULTICOMPONENT SEISMIC SURVEYS AT VACUUM FIELD NEW MEXICO Summary 1 Multicomponent time lapse seismology has great potential for monitoring production processes in reservoirs. The reason is simply the presence of fractures. Shear waves are much more sensitive than p waves to the presence of fractures or microfractures and the fluid content within the fracture network. Fractures introduce seismic anisotropy into a reservoir causing two shear modes to propagate with different velocities and therefore different arrival times. The arrival time difference is referred to as shear wave splitting or birefringence and is a critical parameter
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Time Lapse Seismic Data Selection for Acquisition and Processing by Fresnel Zone Estimation
Authors P.L.A. Winthaegen, J.F.B. Bolte and D.J. VerschuurP667 TIME LAPSE SEISMIC DATA SELECTION FOR ACQUISITION AND PROCESSING BY FRESNEL ZONE ESTIMATION P.L.A. WINTHAEGEN 1 J.F.B. BOLTE 2 and D.J. VERSCHUUR 2 Summary 1 For selecting data to image a specific part of the subsurface a methodology for determining the Fresnel zone at the surface (zone of influence) is proposed. This methodology is based on the Common Focal Point matrix and is fully data-driven by using 2D or 3D seismic data. By applying this method not only the contributing traces for processing are selected but also the source and receiver positions needed for acquisition. The presented methodology can
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Time-Lapse Amplitude Variations on Seismic Data from the Oseberg Field
Authors E. Stucchi, A. Mazzotti and P. TerenghiP-668 Time-Lapse amplitude variations on seismic data from the Oseberg field. 1 A. MAZZOTTI E. STUCCHI* and P. TERENGHI University of Milano Earth Sciences Dept.- Geophysics Via Cicognara 7 20129 Milano Italy. Introduction. We illustrate the final results of a time lapse seismic amplitude study carried out on data pertaining to four 3D vintages (1982 1989 1992 1999) of the Oseberg field in the North Sea. In particular we focus on a subset of 2D lines of 1982 1989 and 1999 which have almost coincident spatial locations. Oil production from the Brent reservoir started in 1988 and gas injection was
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Elastodynamic Reciprocity Theorems for Time-Lapse Seismic Methods
Authors J.T. Fokkema, C.P.A. Wapenaar, M. Dillen and K. SchalkwijkP669 ELASTODYNAMIC RECIPROCITY THEOREMS FOR TIME-LAPSE SEISMIC METHODS JACOB FOKKEMA 1 KEES WAPENAAR 1 MENNO DILLEN 1 and KARIN SCHALKWIJK 2 1 Section of Applied Geophysics Centre for Technical Geoscience Delft University of Technology The Netherlands 2 Section of Seismics and Acoustics Centre for Technical Geoscience Delft University of Technology The Netherlands Introduction Reciprocity theorems play an important role in formulating true amplitude operations on seismic wave fields such as multiple elimination migration and characterization. In general a reciprocity theorem interrelates the quantities that characterize two admissible physical states that could occur in one and the same domain (de Hoop
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4D on Legacy Data - The Tern Field
Authors G. Cooke and D.J. DaviesP670 4D on Legacy Data - The Tern Field Abstract The Tern Field has been covered by two 'legacy' 3D datasets in 1983 and 1995. The field has also been re-shot in 2000. The legacy data acquisition was designed independently and with structural objectives only. As an experiment it was decided to attempt a time-lapse study using this data and a minimum of reprocessing of the original seismic data. This is both for time and also cost savings and to estimate the real potential for realization of the value invested in legacy 3D data in the North Sea. The field
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