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7th EAGE Saint Petersburg International Conference and Exhibition
- Conference date: 11 Apr 2016 - 14 Apr 2016
- Location: Saint Petersburg, Russia
- ISBN: 978-94-6282-179-8
- Published: 11 April 2016
1 - 20 of 198 results
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Regional and Local Forecasts Oil-Bearing in Bazheno-Abalak Complex of Western Siberia
By M.Y. ZubkovProposed list of criteria to assess the prospects of regional oil-bearing Bazheno-Abalak complex and original method of local forecasting based on aggregation of seismic data and tectonophysical modeling
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Collectors Tectonic-Hydrothermal Origin in the Pre-Jurassic Complex of West Siberia and Methods of its Forecasting
By M.Y. ZubkovSubstantiates the tectonic-hydrothermal formation mechanism of secondary collectors in the roof of the pre-Jurassic complex of West Siberian oil and gas basin, a method of searching on the basis of seismic data, proved that served as the source of hydrocarbons Jurassic deposits.
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The SiO2 Occurrence and Origin in Shale Reservoir, a Case Study from the Yanchang Formation, Ordos Basin
By L.G.H liuThis study employs samples from the Yanchang Formation of Ordos Basin, probing the SiO2 occurrence and origin in shale reservoir in order to figure out the effect of SiO2 on physical shale properties.In order to research the SiO2 occurrence and origin in shale reservoir a series of integrated and repeatable methods has been used including X-ray diffraction of bulk and clay minerals, cathode luminescence analysis, Ar-ion polishing, focused ion beam scanning electron microscopy (FIB-SEM) and energy dispersive spectrometry. three point-views were drawn about SiO2 occurrence and its effect on rock property.
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A New Method for Semi-Quantitative Analysis of Amorphous SiO2 in Terrestrial Shale a Case Study About Yanchang Formation
By L.G.H liuYanchang Formation shale of Ordos basin contains a certain amount of amorphous SiO2, which proved by SEM observation and X-ray diffraction analysis of bulk rock. The three methods proposed by now to calculate the quantity of amorphous SiO2 have their own flaws. The disadvantages of chemical denudation are experimental period and unconvinced accuracy because of dissolving other minerals. Quantitative analysis of amorphous silica by X-ray diffraction possesses high personal error on the integrated intensity of dome-shaped scattering curve in XRD spectrum of amorphous SiO2. The doping method has high deviation and needs to compound standard sample, while some kinds of pure minerals are hard to get. On the basis of summarizing researches have been done, a new method that combines QEMSCAN and XRD is proposed for the issue of amorphous SiO2 calculation in multiphase system. The new method avoids the flaws in approaches have been proposed, and calculates the amount of amorphous SiO2 indirectly according to the quantities of quartz and SiO2 measured respectively.According to QEMSCAN 650F integrated with XRD and gravity drainage method, we can calculate the mass percentage of amorphous silica, and the mass percentage of amorphous silica of YQ8 sample is 7.75%.
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The Exquisite Comparison of Shale Reservoir Characteristic Between Chang 7 Member and Chang 9 Member in Yanchang Formation
By L.G.H liuThe purpose of this article is to provide awareness of the subtle difference among these three sections shale.In order to figure out the exquisite distinction, nearly 200 samples have been used in a series of integrated and repeatable methods, including XRD, SEM-EDS, trace elements analysis, TOC and ROCK-EVAL.II Methodology, Vitrinite reflectance analysis, N2 adsorption analysis, CH4 adsorption analysis, and rock property analysis.
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Experimental Measurement and Mathematical Model for Intrinsic Permeability of Tight Rocks and Shale at Low Pressure
More LessGas flow in porous media differs from liquid flow due to the large gas compressibility and the klinkenberg effect. Klinkenberg effect is not negligible when the pressure is low or the permeability of the reservoir is very small. Enhancing the backpressure could eliminate the klinkenberg effect. However, high pressure is not always accessible under the lab or field production condition. As intrinsic permeability is important not only for the reservoir simulation but also for the theoretical study of gas flow in unconventional reservoir, a new method for determining the intrinsic permeability of tight and shale rocks was developed, excluding the effect of klinkenberg via both experimental measurements and numerical calculation. The steady state measurements were conducted with high purity helium. A mathematical model was then derived to determine the intrinsic permeability based on the measured gas fluxes and pressure profile. To test the presented method, extra measurements were conducted for methane flooding on three shale cores at low outlet pressure (lower than the minimum backpressure), showing good agreement with the data obtained from our model. The advantage of the method lies in two points: one is that the results are much more accurate than that from traditional PPD method when error exists in the existence of klinkenberg effect. This advantage is especially significant for tight and shale cores because the extra low permeability makes the effect of klinkenberg effect non-neglected. The other is that this method could be applied to any outlet pressure excluding the effect of klinkenberg effect.
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Problems of a Choice of Profitable Hydrated-Gas Accumulations for Operation
By A.S. BabaevDiscovery in water areas of the seas, oceans and some lakes of set of deposits of gas hydrates and their detection confinedness to areas with the raised values of geothermal fields have made a choice of criteria of search of the deposits most favourable to working out especially actual. Thereupon the author makes a number of the requirements, which performance at a choice gas hydrates deposits will allow to make gas production of it profitable. It is found out that to these conditions more all corresponds to a deposit of the hydrates generated by griffons functioning throughout a long time interval of operating underwater mud volcanoes. On the basis of calculations it is proved that thickness of layers of hydrates this deposits depends on volume of gas emissions of a griffon, and also depth of the sea on which there are griffons. The area of sedimentation of hydrates round a griffon at 20-50 time is less than flood area breccia during eruption also does not exceed first tens hectares. It is shown that process of thermal destruction hot breccia the rest which has generated for years of a volcano of a hydrated-clay layer does not change essentially volume-mass indicators of this layer
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The Stability of the Horizontal Wellbore while Drilling the Bazhenov Formation in Western Siberia
Authors E.A. Gladkov, E.E. Gladkova, E.G. Karpova and N.E. PulkinaThe results of studies of the behavior of core samples graded among ULTRADRIL, KCl-POLYMER, as well as in fresh water. The results of studies of the behavior of core samples fractionated in a medium Ultradril, KCl-Polymer, and also in fresh water showed complete inertness breed. Actual data proved that for horizontal drilling in different types of drilling mud will be mainly mud weights, instead of its formulation. It should be an in-depth study of geomechanical drillings rocks, with mandatory corin
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3D Geological Modelling Methodology for Unconventional Reservoirs of the Bazhenov Formation
Authors A. Telnova, V. Baranov, N. Bukhanov and P. BeschasovaThe Bazhenov is been researching during more than 50 years, but up to now the petroleum potential, optimal STOIIP or resources estimation approaches, reservoirs selection, petrophysical properties definition methodology are not clear. Distinctive features of bituminous shale are specific geochemical properties which were chosen as base parameters for the Bazhenov deposits geological modelling and key areas recognition. Main objective of this paper is choosing optimal algorithm of 3D geological modelling and testing it with conventional (petrophysical) and specific (geochemical) properties.
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Classification of the Bazhenov Formation Using Well Logs (R Field)
Authors D.A. Simonov, V. Baranov, N. Bukhanov and P. BeschasovaThis paper consider the main aspects of the Bazhenov formation interpretation and applying of machine learning algorithms in cases a of Kolpashev type section of the Bazhenov formation. Application of automatic algorithms of classification which would transfer the scale of research from small to large. Machine learning algorithms help to interpret the Bazhenov formation in reference well and in the other wells. During this work the unsupervised and supervised machine learning algorithms were applied to interpret the lithology and reservoir properties. This greatly simplifies the routine problem which deals with manual interpretation and has an economic effect deal with cost of laboratory analysis.
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On the Selection of the Optimal Mode of the Wave Stimulation in Oil Production
Authors E.A. Marfin, A.A. Abdrashitov and Y.I. KravtsovThe work dedicated to the problem mode selection of the wave stimulation to improve the efficiency of oil extraction. The method of combining with wave action by SAGD with two-wellheads reviewed. The process of formation of standing waves in the injection well and the energy propagation of elastic vibrations into a producing reservoir through the wall of the well is investigated. The existence range of the exposure frequency, at which there is minimal absorption of elastic waves, is set. It is shown that with increasing distance from the injection well a value optimum frequency shifts downwards. Obtained results may be the basis for selecting the optimal frequency wave stimulation.
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Genesis and Geological Structure of Oil Pools in the Sediments of Abnormal Bazhenov Formation Section
Authors V. Grishkevich, V.K. Kasatkin, S. Lagutina and E. PaninaThe article describes the concept of genesis of sand and silt bodies in the anomalous section of Bazhenov formation (ASBF), which is represented as postsedimentary gravitational displacement and plastic deformations of sedimentary rocks on the slope of Neocomian sedimentary side fill basin. Practical examples of the oil deposits in areas ASBF are shown.
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Features of Lithology and Geochemistry of Organic Matter of the Bazhenov Formation Pavlovskaya Area with the Use of GIS
Authors I.A. Zhigulsky, V.G. Eder, I.S. Sotnich, E.A. Kostireva and M.A. HalikovaLithological, geochemical and geophysical parameters of the Bazhenov Formation were analyzed in the poorly studied region in the south of the South-Nadimskaya megamonoclise on the Povhovskaya area. The bottom-to-top sequence of the Bazhenov Formation in this region is composed of 4 patterns: siliceous mudrocks – kerogenous siliceous mudrocks – clayey-siliceous mudrocks carbonate-siliceous mudrocks with carbonate lenses. These lithotypes differ by TOC values. GIS data of the studied section were comparing with the core. According to the cross-plot modeling (GIS-GIS ratios) 4 types of rocks were distinguished, that are characterized by their own area of parameters distribution. No differences were revealed in the lithotypes by biomarker parameters. According to geochemical parameters organic matter is related to the II type of kerogenous, that is aquagenous, and correspond to the main oil formation stage. In general Bazhenov Formation rocks characterized by low porosity (0,32-2,32 %). The structure of the Bazhenov Formation section of the studied region in general looks like to the Salum region sections. In the investigated area in the Upper Jurassic-Lower Cretaceous period hemipelagic conditions occurred. Reduced conditions distinguished during sedimentation and diagenesis. Both these factors controlling high concentrations of TOC in sediments.
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Forecast of Perspective Areas in the Oligocene Deposits Using a Comprehensive Analysis of Geological-Geophysical Data
Authors Y. Varov, F. Bars, O. Karamisheva and O. SivalnevaBased on the integrated analysis of a comprehensive geological and geophysical data lithological and geophysical characteristic of the Oligocene rocks was formed. It is the basis for the forecast of potentially productive interval distribution in the Khadum horizon and Batalpashinsk formation. These intervals are characterized by a low clay content, high brittleness and fracturing. Determination their distribution allows to predict of perspective zones for prospecting and exploration areas. The integrated geological and geophysical analysis approach may be applied to study of unconventional reservoirs within other areas of the North-Caucasian oil and gas province.
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Updating of Geological Oil and Gas Zonation of the Russian Federation (Onshore and Offshore)
Authors V.S. Shein and A.A. KnipperThe advantages of zonation based on using plate tectonics are given in this work. «Trial map of geological oil and gas zonation of the Russian Federation (onshore and offshore) based on using plate tectonics» is proposed. The comparison of traditional and new zonation methods is given.
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Tectonic Structure of the Conjunction Zone of the Laptev Sea Shelf and the Siberian Plate (From the Finding of 2D CDP Reflection Seismic Studies of 2013 - 2014)
By Y. VasilyevaBased on 2D CDP reflection seismic studies conducted by JSC SEVMORNEFTEGEOFIZIKA in 2013 – 2014, the tectonic structure of the northwestern part of the conjunction zone of the Laptev Sea shelf and the Siberian Plate was studied. Disjunctive dislocations were revealed on time seismic sections of the Laptev Sea shelf, i.e. dip-slip faults that had led to the formation of horsts and grabens. Within the Siberian Plate, dip-slip faults, reverse faults and overthrust reverse faults were observed, forming flower structures. The conjunction zone of the Laptev Sea and Siberian plates includes the continuation of the South Taymyr fold zone with overthrust reverse faults. In the southeastern part of the area, the conjunction of the Laptev Sea and Siberian plates is represented by a series of reverse faults and a high-amplitude regional dip-slip fault. The following tectonic elements were revealed in the revised schematic tectonic map of the Laptev Sea and northwestern margin of the Siberian Plate: the Lena-Anabar marginal zone with South Taymyr High and the Kharaulakh Marginal Zone. It was assumed that the South Taymyr High and the Kharaulakh Marginal Zone are divided by a regional oblique-slip fault on the continuation of the Khatanga-Lomonosov transform fault
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Features in the Sedimentation and Organic Geochemistry of the Lower Toarcian Clays in Northern Eastern Siberia
Authors E.A. Fursenko, B.L. Nikitenko and V.G. KnyazevRecently the interest is increasing to the Arctic region, which are regarded as the areas with significant hydrocarbon resources. So the important task is the comprehensive geological and geochemical studies in the Arctic to identify enriched dispersed organic matter, a potentially oil source strata. As is well known the crisis events in the biosphere (eg T-OAE) are most favorable for the formation of such sequences. It has been shown that T-OAE had a significant impact to features on Pliensbachian - Toarcian clay strata exposed in outcrops Kelimyar River (the Olenek river district, Eastern Siberia).
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Tectonic and Paleogeographic Conditions of Anadyr Trough Petroleum Systems
Authors E.A. Lavrenova, N.A. Malishev, V.V. Obmetko, A.A. Borodulin and A.A. GorbunovBasin analysis as well as petroleum system modeling within Anadyr trough have been performed. It was revealed that Anadyr trough includes several sedimentary basins with different development. These differences determine petroleum system evolution and therefore Anadyr trough oil and gas prospects
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Geological and Geophysical Criteria for Identifying Zones of Productivity Bazhenov Formation of the Salym Group of Field
Authors S.I. Bilibin, A.V. Vovk, T.F. Diakonova, T.G. Isakova and E.A. YukanovaThe proposed indirect geological and geophysical criteria for identification pale geological signs with the current state of the Bazhenov formation. Geological properties of the Bazhenov formation, due to conditions sedimentation, structural factors, the temperature of the reservoir and other. The quantitative basis for the division of indirect criteria for grading is their comparison with the accumulated oil production and the ratio of the specific productivity of the wells.
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Multiple-Point Geostatistical Modeling with Training Images
By M.S. VolkovaIn this paper, some aspects of practical application of multiple-point statistical simulation are considered. Multiple-point simulation is aimed to overcome the certain restrictions, which exist in classical geostatistics. Methods of multiple-point geostatistics include an ensemble of sequential simulation algorithms which use the training image as input data for the description of spatial structure of geological object. The results of modeling with various training images are presented. The next kinds of training images were used: stationary, nonstationary, categorical (for facial modeling), continuous (for modeling of effective thickness). In the DV-Geo module of multiple-point statistics the Direct Sampling algorithm (Mariethoz et al., 2010) is realized. It is possible to say that Direct Sampling algorithm successfully operates on fields with small and large number of wells. The demanded computer memory and CPU time do not depend on the volume of well information
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