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Geomodel 2019
- Conference date: September 9-13, 2019
- Location: Gelendzhik, Russia
- Published: 09 September 2019
81 - 100 of 140 results
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Petroleum Potential of the Paleozoic of the Northern Part of Srednevasyugan Megaswell (Tomsk Region)
Authors M.V. Solovev, V.A. Kontorovich, A.Y. Kalinin and L.M. KalininaSummaryThe paper discusses the features of the Paleozoic deposits geological structure of the northern part of Srednevasyugan megaswell located in the south-east of Western Siberia. A map of the material composition of the pre-Jurassic basement rocks was constructed. The difficulties of searching for Paleozoic collectors are described. Low-contrast blocks of carbonate rocks that are of greatest interest in relation to petroleum potential are identified. These blocks are characterized by reduced seismic recording amplitudes and are limited to Jurassic faults.
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Geological Modeling of the Field of the Caspian Basin, Complicated by Dome-Salt Tectonics
Authors I.S. Gutman, G.N. Potemkin, P.S. Biktagirova, S.A. Rudnev and I.G. Il’dzhirinovSummaryThe basis of the work is the refinement of the geological structure of the Sovkhoznoye field, complicated by salt-dome tectonics. As a result of the work, the geological and tectonic structure of the Sovkhoznoye deposit is refined. Based on logging data, field geophysical studies, a detailed correlation of well sections was performed. Based on it, productive formations have been allocated and the reservoir has been geometrized. A geological model of a gas deposit of the Sovkhoznoye field has been created, taking into account the peculiarities of salt-dome tectonics. An assessment of the geological heterogeneity of the reservoir. Based on the updated geological model, recommendations for further efficient development of the field are proposed.
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Quantitative Analysis of Whole Core Images
Authors I.A. Seleznev, V. Abashkin, A. Chertova, S.B. Istomin, A.F. Samokhvalov and D. RomanovSummaryThis paper describes a workflow for automatic processing of whole core images that enables macroscopic description of the rock layers constituting the studied geological section. The method makes it possible to detect core properties descriptors including, rock color characteristics, texture, layering inclination and thickness, and the shape and size of clastic inclusions. The method includes procedures for the detection of layering via convolution transformation of the image, clastic inclusions detection and characterization using watershed via segmentation procedures, processing color/intensity analysis, cluster analysis using normalized color/intensity data of a given image zone, and other image processing and analysis procedures, which enables obtaining any information for characterizing core samples. The parameters can be selected automatically or set manually. They depend on the particular task and target scale. Both normalizing daylight and UV images of core can be used. Clustering enables automatic detection and filtering of zones of photographs that are filled with organic spacers, heavily fractured material, or zones filled with organic matter. Processing results for terrigenous and carbonaceous whole core images are presented in the paper. The results are compared with petrophysical analysis of the rock material and profiling of the physical properties of the whole core materials.
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Interrelation Between the Structure of the Earth’s Crust and Upper Mantle and the Maturity of Source Rocks
Authors I.N. Ognev and D.K. NourgalievSummaryThis work is aimed at studying the interrelation between the structure of the Earth’s crust and upper mantle and the maturity of source rocks based on modern satellite gravity data. Here, considering recent studies, we propose to use GOCE gravity field models for a gravity field inversion in order to define Moho depth on Volga-Ural oil and gas-bearing province. This will allow us to construct more precise heat flow models and consequently maturity maps of higher accuracy for this region. Volga-Ural oil and gas bearing province is a good region for the goal of this study because it is well surveyed geologically and geophysically. Moreover, it has gotraverse “TATSEIS-2003” where Moho boundary is defined, so the final crustal Model can be calibrated using these data. Besides, there is still a controversy in terms of mechanisms of maturation and migration of oil from Domanic source rocks in such big deposits as Romashkino, so there is a need for further investigation of this region through basin modelling. All the available and needed data as well as a proposed workflow for gravity field inversion are discussed in this study.
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A Study Into the Depositional Environments of East Arctic Sedimentary Basins Aimed at Evaluating their Hydrocarbon Potential
Authors G.A. Zavarzina, D.S. Shapabaeva and O.A. ZakharovaSummaryAt a stage of regional geological studies, the key problems to be solved when predicting the hydrocarbon potential of the East Arctic sedimentary basins are to estimate the main parameters of the sedimentary cover, namely to identify major depositional seismic sequences, assess their thickness, reconstruct depositional environments and predict seismic facies. By reconstructing paleodepositional environments in which sedimentary sequences were laid down, we will be able to evaluate the region’s hydrocarbon potential and to define a strategy for planning further geological exploration on the continental shelf.
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The Results of Monitoring of Hydrocarbon Traps of the Terrigenous Vendian Complex of the Eastern Part of the Baikit Petroleum Region
By V.V. SerovSummaryThe results of the working reports and published articles were reviewed. The main idea of the article shows is to show a change in the structure of hydrocarbon traps. It is believed that hydrocarbon traps are the main objects of study in oil and gas geology. Particular attention is paid to the reliability of the mapping of hydrocarbon traps.
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Illumination Analysis for 3D Survey Design Over Complex Paleozoic Structures: Tomsk Region Case Study
SummaryPre-Jurassic complex is one of the objects for expanding the resource base of Tomsk region. The theoretical foundations of seismic and the complex geological situation determine the ambiguity of the results of recording and processing seismic data. One of the main ways to increase the reliability and uniqueness of decisions, identify possible risks during field investigations is the direct modeling method based on real geological models. Ray trace modeling has been applied for evaluation of the optimality of the shooting scheme. The result of ray tracing is the illumination maps, which show the actual fold along target horizon and effect of the velocity model, the structure and recording geometry. An analysis of a wide range of ray attributes for the generated synthetic recording systems, the results of finite-difference modeling made it possible to make recommendations on the optimal acquisition system providing the best illumination of the studied formation, which consist in limiting the distances to no more than 7 km, receiver line distance – 200 m, shot line distance – 200 m, bin size 25×25 m.
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Basic Assumptions for the Pre-Aptian Deposits Mapping on the East-Siberian Sea Shelf
SummaryNow the East Siberian Sea is one of the least explored by geological methods seas in the Russian Arctic. But in recent years the work carried out by PJSC Rosneft Oil Company allowed to obtain fundamentally new data about the evolution of the East Siberian Sea sedimentary cover and its depositional conditions that are directly related with hydrocarbon prospectivity of the region.
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Multi-Azimuth Depth Imaging of Marine Surveys
Authors O. Litvyakova, A. Sakharov, A. Welbon, A. Bodrov, A. Korolev, B. Esinov and E. BeSummaryMulti-azimuth depth imaging - Norwegian sea case study.
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Numerical Simulation of Non-Stationary Fluid Filtration in a Digital Model of a Synthetic Porous Medium
Authors E.A. Marfin, A.A. Abdrashitov, D.V. Chachkov and M.A. VasilevaSummaryThe paper studies the influence of superimposed oscillations on the flow of a liquid in a porous medium. The object of the study is a three-dimensional pore space, obtained by the results of Х-ray microtomography of a synthetic porous medium. Physically, models of porous samples are created from microscopic glass beads by sintering in a muffle furnace. The flow of fluid in the pore space is described by the continuity and Navier-Stokes equations. Computer modeling was carried out for both stationary flow and flow with superimposed oscillations. The regularities of the flow and the influence of superimposed vibrations on them are determined. The obtained data can be used to improve the methods of wave action on productive formations for oil production.
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Search and Prediction of Reservoirs in the Pre-Jurassic Rock Complex
Authors A.I. Evdokimova and A.V. BobrovSummaryThis work, performed on the basis integrated interpretation of seismic exploration and deep drilling data. Deals with the analysis of the geological structure and petroleum potential pre-Jurassic deposits Luginetsk field with objective search deposit petroleum.
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Determination of Oil Samples Viscosity and Group Composition by Geochemical and NMR Data Complex Interpretation
Authors E.S. Chernova, M.Y. Shumskaite, A.I. Burukhina, V.N. Glinskikh and E.A. FursenkoSummaryThe paper presents the results of NMR studies of oil samples and its fractions at the different temperature. The group analysis of the samples has been carried out by NMR data, which is consistent with the geochemical analysis data. Viscosity was estimated by NMR data in gradient magnetic field. It was established the dependence of the transverse relaxation time on the content of resinous-asphalting compounds at different temperature.
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Gas Hydrates Potential of the Arctic, Northern Atlantic and Pacific Oceans
Authors V.I. Bogoyavlensky, A.V. Kishankov, A.S. Yanchevskaya and I.V. BogoyavlenskySummaryThe Arctic Ocean and adjacent offshore areas contain giant resources of gas hydrates (GH) – solid compounds, formed as a result of interaction of gas and water at enhanced pressures and decreased temperatures. GH have much more gas resources in comparison with conventional fields, and they are considered the energy sources of future. However, GH are dangerous for exploration and production of conventional fields and other activities in the Arctic. Changing of thermobaric conditions in the upper part of sedimentary cover during well drilling in areas of GH distribution can cause their dissociation, which may lead to accidents and disasters. Moreover, emission of gas from GH into atmosphere plays a significant role in climate change on the Earth. The objective of this research was the forecast of GH distribution zones in the Arctic Ocean and adjacent northern areas of the Pacific and Atlantic oceans from 45 to 90°N. On basis of data of NOAA, near-bottom water temperatures in the studied megaregion were analyzed. Minimum depths suitable for methane hydrates (MH) existence at different temperatures were calculated, using CSMHYD software. Also numerous CDP seismic sections were analyzed, and revealed BSRs appeared to be within the forecasted zone of MH distribution.
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Well Trajectories Optimization in the Three-Dimensional Hydrodynamic Model
Authors L.I. Akmadieva, S.D. Ilichev and A.S. AsylgareevSummaryAsset value depends on the choice of the optimal development system. In conditions of hard-to-recover reserves, three-dimensional hydrodynamic modeling is an integral part of the development design. Trajectory of a horizontal well is a critical parameter in assessing production potential. The high labor costs often lead to the fact that developers neglect to perform a detailed assessment of the development systems. This can lead to incorrect design decisions. it is required to develop a tool that allows you to automatically create realistic well trajectories and generate predictive options for calculation that exclude deliberately non-optimal well trajectories in the reservoir. Our tool choose the technologically achievable optimal well trajectories, taking into account the restrictions on the angle set during drilling.
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Prognosis of Carbonate Reservoirs of the Technology of Separation of Scattered Waves using the Method of Gaussian Beams
Authors D.A. Petrov, A.A. Melnik, V.V. Shilikov, M.I. Protasov and V.A. CheverdaSummaryAn approach to innovative method for the extraction of scattered waves, developed by OOO RN-KrasnoyarskNIPIneft, using the method of Gaussian beams to detect fractured-cavernous reservoirs and faults. Gaussian beams are a new round in the development of techniques using scattered waves. The new technology has a high and uniform resolving power, which will allow obtaining accurate diffraction images of the fine structure of fractured-cavernous reservoirs.
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Substantiation of the Geological Model for the Successful Development of Deposits on the Example of One of the Fields SN-MNG
Authors K.V. Egorova and L.A. GurievskikhSummaryhe report describes the creation of a 3D geological model taking into account facies heterogeneity. Seismic and core data were analyzed in the study. As a result, the correct variogram rank would be chosen to predict reservoir properties and a clay line would be drawn.
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Features of the Geological Structure of Gas Deposits in the Carbonate Strata of the Yamal Peninsula
Authors A.V. Beltikov and T.S. MalyshevskayaSummaryThe pre-Jurassic folded base of the Paleozoic Deposit is dated on the basis of paleontological and palinological studies with a time range from the Cambrian to the Carboniferous. On the studied area, the Megacomplex is structurally a broad deflection - rift eroded at the edges, subsequently filled with carbonate strata. Stratigraphically, the Megacomplex can be divided into two unequal floors: the weathering crust and the metamorphosed dislocated base. Lithologically, Megacomplex rocks are represented by marbled limestones, marls, dolomites, peridotites, gray and green shales. Analysis of core material showed that reservoirs are porous limestones terminowe largely dolomitized According to 3D seismic data revealed 388 faults belonging to the three main types, as well as 5 inclined boundaries with disagreement adjacent to the roof of the pre-Jurassic base. Gas deposits are trapped tectono-stratigraphic type.
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The Updated Model of Paleozoic Reservoirs in the North-West of the Timan-Pechora Province Based on the Results of Recent Geological Exploration
Authors O.M. Prishchepa, E.I. Grokhotov, A.N. Pestova and S.E. BashkovaSummaryStudies of the structure of the pore space of the northwestern part of the Timan-Pechora oil and gas province based on the results of the exploration in the period 2013–2018, provide an opportunity to assess its reservoir potential. In previous years, regional seismic surveys were carried out within the Izhma-Pechora depression and in adjacent territories, and a parametric North-Novoborskaya well was drilled with core sampling, which was investigated by litho-petrographic and biostratigraphic methods. Based on the implementation of a complex of laboratory and analytical studies, taking into account the results of seismic interpretation, the model of the structure of the pore space of the Paleozoic sediments was refined. According to the lithological composition, two types of reservoirs are established in the sediments - clastic and carbonate.
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Using Pyrolysis for the Reservoir Properties Assessment of Low-Permeability Carbonate Formation
Authors E.A. Vtorushina, M.N. Vtorushin and T.D. BulatovSummaryThe organic matter characteristics are obtained and oil-saturated intervals are identified in the sections of low-permeability carbonate formation based on pyrolysis data using rock analyzer HAWK Resource Workstation. Depth distribution of pyrolysis parameters in wells – thermally freed hydrocarbons (S0+S1), kerogen (S2), Tmax, Total Organic Carbon (TOC), Production Index (PI), Oil Saturated Index (OSI) and Hydrogen Index (HI) are investigated. It has been shown that the thermal maturity of organic matter of the most samples comes to “oil window” zone. The kerogen is mainly of Type II. According to pyrolysis data the distinguished features of the reservoir rocks are increased PI values, OSI > 100 mg HC/g rock and significant S2 peak decreasing (more than 50%) after extraction that indicates the allochthonous bitumoids.
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Effect of Pore Space Structure on Lythotypes Wettability in Upper-Devonian Formation of Timan-Pechora Province
Authors S.A. Borisenko, P.V. Koshkin and S.Y. RudakovskayaSummaryComprehensive studies of the carbonate reservoir rocks wettability in compliance with a pore space structure were done. Research complex involved NMR with deuterium oxide saturation, USBM, mercury injection, computer tomography, image-analysis of thin sections. Influence of different pore-size groups on lythotypes wettability was determined.
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