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1st EAGE North African/Mediterranean Petroleum & Geosciences Conference & Exhibition
- Conference date: 06 Oct 2003 - 09 Oct 2003
- Location: Tunis, Tunisia
- Published: 06 October 2003
41 - 60 of 162 results
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Seismic Inversion and Reservoir Characterization, NC73, Sirt Basin, Libya
Authors A. Shahlol and A. MananiP041 SEISMIC INVERSION AND RESERVOIR CHARACTERIZATION NC73 SIRT BASIN LIBYA 1 ABDU-ELHAMED A. SHAHLOL and ALI M. MANANI Exploration Division Arabian Gulf Oil Company Benghazi Libya P. O. Box 263 Summary Geophysical inversion involves mapping the physical structure and properties of the subsurface of the earth using measurements made on the surface of the earth. However this is a broad definition that actually involves all seismic analysis work and interpretation. Inversion technique attempt to recover a broad-band pseudo-acoustic impedance log from a bandlimited seismic trace. This paper presents the seismic inversion work conducted over a carbonate deposits in the central
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New Data on Oil Source-Rocks in Pliocene Sediments of the South Caspian Petroleum System
More LessP042 NEW DATA ON OIL SOURCE-ROCKS IN PLIOCENE SEDIMENTS OF THE SOUTH CASPIAN PETROLEUM SYSTEM 1 SUMMARY Traditionally the principal oil source–rocks in the South Caspian basin (SCB) are considered to be Paleogene-Miocene deposits (Maykop-Diatom). As a result of conducted studies of Lower Pliocene sediments (Productive Series-PS) it had been revealed the oil generation potential of some stratigraphic units of PS. Results of given research are very important for development of further strategy of exploration and resources estimation in the South Caspian region. Black Sea 0 G eorgia Turkey 150km Dzirul Massif Armenia Greater Caucasus Lesse Cau r casus Azerbaijan
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L. Albian & Cenomanian-Turonian Source Rocks – A Key to Assess the Geodynamic & the Petroleum System of J.Goraa Area-Salt Dome Zone Northern Tunisia
Authors G. Chaari, H. Belayouni and M. SoussiP043 L. ALBIAN & CENOMANIAN-TURONIAN SOURCE ROCKS – A KEY TO ASSESS THE GEODYNAMIC & THE PETROLEUM SYSTEM OF J.GORAA AREA-SALT DOME ZONE NORTHERN TUNISIA 1 G. CHAARI H. BELAYOUNI & M. SOUSSI I. INTRODUCTION The work achieved concerns a geochemical study of the two source rocks occuring in the Goraa area (Salt Dome Zone-Northern Tunisia) the Late Albian Mouelha member and the Cenomanian-Turonian Bahloul formation. A special emphasis was accorded to the thermal maturity variation along a north-west to south-east axis across the study area. The objectives are to assess the petroleum system in this area and predict migration
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Hydrocarbon Potentialities of October Oil-Field area, GOS, Egypt
Authors G.R. Gaafar and M.Y. Zein El DinP044 HYDROCARBON POTENTIALITIES OF OCTOBER OIL-FIELD AREA GOS EGYPT 1 M.Y. ZEIN EL DIN 1 and G.R. GAAFAR 2 1 Geol. Dept. Fact. Of Science. Al Azhar Univ. 2 Gulf of Suez Pet. Company (GUPCO) The geochemical analysis data of 350 samples from 5 wells in October oil-field area have been used in this study. These analyses include the Total Organic Carbon (TOC) determinations programmed pyrolysis kerogen examination and vitrinite reflectivity measurements. The potential source rock intervals in the drilled section were determined and investigated through thermal history models. These models were run at the analysis well locations (5 wells)
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Gravity Compilation of Libya and Its Interpretation
Authors A. Sahil, A. Suleiman, O. Hammuda, B. Mejrab and A. BizanP045 GRAVITY COMPILATION OF LIBYA AND ITS INTERPRETATION 1 A. SAHIL A. SULEIMAN O. HAMMUDA B. MEJRAB and A. BIZAN Petrolume Research Center Tripoli- Libya The process of preparing a gravity compilation of Libya was started in the mid nineties when the National Oil Corporation (NOC) appointed a committee to evaluate the combined gravity project of Libya. A stage of assembly and integration was carried out through Robertson Research International Limited in Llandudno in 1998 with the expectation that more data would be forthcoming particularly elevation data where it was lacking in the center of the country. A second stage
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Gulf of Gabes – Tentative prediction of gas quality
By E. ClarkeP046 GULF OF GABES – TENTATIVE PREDICTION OF GAS QUALITY 1 The occurrence of significant quantities of carbon dioxide nitrogen and hydrogen sulphide within the Gulf of Gabes has a major impact upon the economics of hydrocarbon exploration and development in the basin. Consequently being able to predict both the presence and concentration of these non-hydrocarbon gases is a key objective for BG Tunisia. However this task is complicated by the existence of multiple sources for both hydrocarbons and non-hydrocarbons. Therefore an investigation has to be performed in two parts firstly it is necessary to identify which sources contribute to
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Structural Evolution of the Cap Bon-Grombalia Area, Northeastern Tunisia – Effects on the Hydrocarbon Generation & Expulsion Histories
Authors F. Adouani, S. Aissaoui and M. SaidiP047 STRUCTURAL EVOLUTION OF THE CAP BON- GROMBALIA AREA (NORTHEASTERN TUNISIA) EFFECTS ON THE HYDROCARBON GENERATION & EXPULSION HISTORIES 1 F.ADOUANI S.AISSAOUI & M.SAIDI ETAP-27bis Av. Kheireddine Pacha –1002 Tunis-Tunisa INTRODUCTION After the discovery of Belli and El Manzah fields the Eocene fractured limestones reservoir became an important objective in northeastern Tunisia. The selection of new drilling targets in the complex Cap Bon-Grombalia area imposes to determine the geological evolution and hydrocarbon potential. The purpose of this paper is to provide the necessary data for the ranking of new prospects within this area. The following are quantified to meet the
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Microwave Measurement System for On-Flow Monitoring of Water/Hydrocarbon Mixtures
By A. BertoliniP048 MICROWAVE MEASUREMENT SYSTEM FOR ON-FLOW MONITORING OF WATER/HYDROCARBON MIXTURES Alessandro Bertolini* Marwan Technology s.r.l. Via F. Buonarroti 2 I-56127 Pisa Italy In this work we present a microwave–based technique for the on–flow measurement of the water concentration in hydrocarbon compounds. Preliminary results on lubricant oil showed that water content ranging from 100 to 2000 ppm can be detected with an instrumental noise limited accuracy of ±30 ppm. The device is based on a microwave X– band (8–14 GHz) spectrometer [1] that simultaneously estimates both dielectric dispersion and absorption by means of a differential technique already used in the past
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Portable Gravity Gradiometer Using a Monolithic Sapphire Differential Accelerometer
By A. BertoliniP049 PORTABLE GRAVITY GRADIOMETER USING A MONOLITHIC SAPPHIRE DIFFERENTIAL ACCELEROMETER Alessandro Bertolini* Marwan Technology s.r.l. Via F. Buonarroti 2 I-56127 Pisa Italy In this work we demonstrate the feasibility of a new class of low frequency accelerometers for geodynamics studies and space applications. We present the design features of a new low noise single–axis differential accelerometer suitable for airborne geophysical survey and gravity gradient measurements. A resolution of 1 Eotvos (1 E = 10 −9 s −2 ) is achievable in a compact lightweight (less than 2 Kg) room temperature operating instrument. The basic components of a single–axis gravity gradiometer
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A Metrological Technique of Aeromagnetic Data Seabed Reduction – The Tyrrhenian Area Test
By O. FaggioniP050 A METROLOGICAL TECHNIQUE OF AEROMAGNETIC DATA SEABED REDUCTION – THE TYRRHENIAN AREA TEST Summary 1 We show the results obtained reducing the aeromagnetic anomaly field of the Tyrrhenian area (Italy) to the seabed surface and over part of the continental shelf topography. The bathymetry and the topography of the Tyrrhenian area show great variations related to a complex structural setting often associated to the presence of many tectonic lineaments seamounts or volcanic islands. The reduction of the geomagnetic field to the topographic surface is performed using a metrological technique (BTM) based on the downward continuation of the spectral high
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Modelling Turbidite Reservoirs Using Object Models
Authors A.R. Syversveen, R. Hauge and A. MacDonaldP051 MODELLING TURBIDITE RESERVOIRS USING OBJECT MODELS Abstract A complex object model suitable for modeling turbidite reservoirs is presented. The model is demonstrated on an example from the Gulf of Mexico. Introduction 1 Turbidites are deposits from tubidity currents which are down-slope movements of dense sediment-laden water. The local geometry and orientation of the turbidites are therefore strongly controlled by local topographic variations. The local characteristics of the turbidite bodies make the facies modelling difficult. We use an object model for the facies model as described in Lia et al. (1996) but with new and very complex object geometry. The
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Geostatistical Inversion and Lithology Simulation Case Study – MLSE Fields, Onshore Algeria
Authors R. Morton, J. Wanstall, S. Cherry and A. HopkinsP052 GEOSTATISTICAL INVERSION AND LITHOLOGY SIMULATION CASE STUDY – MLSE FIELDS ONSHORE ALGERIA 1 RICHARD MORTON 1 JAMES WANSTALL 1 STEVE CHERRY 2 and ANDY HOPKINS 3 1 Jason Geosystems Woking UK 2 Burlington Resources London UK 3 RDS-Helix Abstract Geostatistical inversion is a technique that allows full integration of petrophysical geological and geophysical data. In this example lithology and porosity simulation coupled with acoustic impedance inversion is performed on a regional 3D land seismic dataset. Enhanced reservoir characterization is developed for two sand bodies one of which is beyond the resolution of traditional seismic methods. Interpretation of the results
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Paleohydraulic Analysis of the Lower Part of Hasawnah Formation, Libya
More LessP053 PALEOHYDRAULIC ANALYSIS OF THE LOWER PART OF HASAWNAH FORMATION LIBYA ABSTRACT 1 Palaeohydraulic analysis has proved useful in reconstructing a variety of flow parameters in meandering and braided river systems mainly with a view to comparing the flow variables with modern rivers of broadly similar scale. However these flow parameters have been estimated for individual bars or a relatively small number of representative bars for a specific reach of the river system and no attempt has been made to continuously monitor flow variables through time in a thick cyclically deposited braided river system. These variables not only provide clues
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Depositional Environment of Lidam and Nubian Sanstone
By M. AbugaresP054 DEPOSITIONAL ENVIRONMENT OF LIDAM AND NUBIAN SANSTONE Abstract 1 The sedimentary sequence infilling Sirt basin was initiated by Nubian Sandstone which is separated from underlying granitic by the Hercynian unconformity and the upper boundary of the sequence by another unconformity followed by an early Late Cretaceous transgressive lithofacies of Lidam Formation. The Nubian sandstone sequence penetrated in the studied well 3V1-59W are 449 ft thickness from depth10546 ft to 10995 ft) of which 106 feet gap and the upper part in is Lidam formation (Cenomnain age) which considered the reservoir for hydrocarbon in concession 59 East 3V-59 block. The
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Part of Eustatism and Tectonics in the Aptian – Albian Unconformity, Northern-Central Part of Tunisia
More LessP055 PART OF EUSTATISM AND TECTONICS IN THE APTIAN – ALBIAN UNCONFORMITY NORTHERN – CENTRAL PART OF TUNISIA Abstract 1 SAADI JALILA DAHA FAOUZI EHSEN ZGHAL and JALLOULI CHOKRI INRSR BP 95 Hammam lif 2050 Tunis ONM Charguia Tunis Faculté des Sciences Rte de Soukra Sfax Faculté des Sciences Campus Universitaire El Manar Tunis The objective of this paper is to demonstrate the surimposition of “salt tectonics” to eustatism in the definition of Aptian-Albian unconformity. We analyse the sedimentary successions in tectonic and diapiric domains (NW of Tunisia) and at the NE of Tunisia. Geodynamic and paleogeographic reconstitutions have been
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Revised Age Dating of Some Cretaceous and Tertiary Formations in Al Jabal Al Ahkdar Area, NE Libya
Authors A.A. El Mehaghag and K.A. AshahomiP056 REVISED AGE DATING OF SOME CRETACEOUS AND TERTIARY FORMATIONS IN AL JABAL AL AKHDAR AREA NE LIBYA 1 The Al Jabal Al Akhdar is a mountain range in the northeast Libya (Figure 1). Late Cretaceous and Tertiary carbonate rocks are exposed in this area. The stratigraphy biostratigraphy and tectonic evolution of the region have been the subjects of many geological investigations since the beginning of the last century. The most important studies (relevant to this paper) are those conducted by Barr and Hammuda (1971) Barr and Berggren (1980) Crema (1922) Desio (1935) Kleinsmeide and Van den Berg (1968) and
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Seismic Sequence Stratigraphy and Structuring of Upper Cretaceous Reservoir Deposits in Central Tunisia
Authors T. Zouaghi, M. Bedir, H. Abdallah and M.H. InoubliP057 SEISMIC SEQUENCE STRATIGRAPHY AND STRUCTURING OF UPPER CRETACEOUS RESERVOIR DEPOSITS IN CENTRAL TUNISIA 1 T. ZOUAGHI 1 2 M. BEDIR 1 2 H. ABDALLAH 1 and M. H. INOUBLI 2 1 Institut National de Recherche Scientifique et Technique BP 95 Hammam-Lif 2050 Tunisia 2 Faculté des Sciences de Tunis Département de Géologie Campus Universitaire 1060 Tunis Tunisia ABSTRACT The integrated geologic and geophysic database defines the sedimentary record in terms of depositional sequences. Unconformities correspond to eustatic sea level changes regional tectonic events and sediment supply. A seismic stratigraphic schema was developed within each basin by comparison to reflection
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Magnetic Properties of Oil Sand at El Borma; Paleomagnetic Dating of Oil Emplacement
More LessP058 MAGNETIC PROPERTIES OF OIL SAND AT EL BORMA; PALEOMAGNETIC DATING OF OIL EMPLACEMENT Palaeomagnetism may help in improving the stratigraphic resolution of a sedimentary sequence if a number of requirements are fullfilled: 1 1) The magnetisation must be localised in minerals whose origin can be determined. If the magnetisation is carried by detrital minerals the time of deposotion may be determined or if carried by secondary diagenetic minerals the diagenetic event may be dated. The problem in most palaeomagnetic studies is the correct determination of the minerals that are carrying the remanent magnetisation. They may be very difficult to
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Palynostratigraphy of the Lower Devonian and the Lower Carboniferous Reservoirs in the Timimoun basin (West Algerian Sahara)
By N. AlemP059 PALYNOSTRATIGRAPHY OF THE LOWER DEVONIAN AND THE LOWER CARBONIFEROUS RESERVOIRS IN THE TIMIMOUN BASIN (WEST ALGERIAN SAHARA) Diverse assemblage of organic microfossils have been recovered from Teg and Reg fields in the Timimoun basin. They consist mainly on terresterial spores marine planktonic chitinozoans and acritarchs. 1 The assemblage are stratigraphically important but not well-preserved.Organic-walled Chitinosoans (represented by Urochitina simplex Fungochitina pistilliformis lata and Cingulochitina plusquelleci) were recovered from the Middle Member of the Dkhissa Formation and assigned to the upper Lochkovian stage which corresponds to the unit D30 of the lower Devonian (Upper Gedinnian). However the upper Member of
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North Africa Platform Structural Synthesis – Impact on the Understanding of Petroleum Systems
Authors A. Serrano, A. Chambers, E. Figari, J.I. Arregui and J.L. RuizS010 NORTH AFRICA PLATFORM STRUCTURAL SYNTHESIS – IMPACT ON THE UNDERSTANDING OF PETROLEUM SYSTEMS Abstract 1 A. SERRANO A.CHAMBERS E. FIGARI J.I. ARREGUI AND J.L. RUIZ Repsol-YPF Exploarcion SA Paseo de la Castellana 280 28008 Madrid Spain This paper consists of a synthesis of numerous published works and in-house studies and attempts to provide a practical tool for the explorationist regarding the impact of structural analysis upon the understanding of the petroleum systems of the North African Platform. It does not aspire to present another regional structural evolutionary model of the North African Platform such as those prestigious published works
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