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Tyumen 2021
- Conference date: March 22-26, 2021
- Location: Tyumen, Russia
- Published: 22 March 2021
51 - 88 of 88 results
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Experience in Using Near Surface Seismic Survey for Mapping The Roof of Rock in Various Seismological Conditions
Authors A.A Golovanova, E.I Stakina, M.D Kaurkin and V.V RomanovSummaryProblems and specifics of studying rock soils. Choosing the optimal method of seismic exploration when tracking bed rock at different depths.
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On The Issue of Developing a Mathematical Model of The Mechanism of Physical and Chemical Migration of Hydrocarbons in The Earth’s Crust
Authors O.S Bruhovetskiy, N.A Sevostyanov and O.E ToporetsSummaryThe development of geophysical methods for prospecting for hydrocarbon deposits, in particular seismic prospecting, and their implementation made it possible to make a huge leap in the efficiency of prospecting and exploration. These methods work well in locations with favorable geological conditions. At the same time, in difficult and unfavorable areas, seismic data is often not confirmed. The negative results obtained undermine the confidence of geologists and reservoir developers in seismic exploration. Seismic exploration is quite expensive and the share of costs for their production is increasing rather rapidly, especially in undeveloped areas with undeveloped infrastructure, due to the increasingly difficult geological conditions and the increasing difficulty of finding search objects. In this regard, it is necessary to develop new approaches to the search and exploration of hydrocarbon deposits. For this, it is necessary to consider in more detail the processes of formation of hydrocarbon deposits, in particular, the process of migration of hydrocarbon components from the place of their maturation to the place of deposition.
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Solution of The Problem of Advancing The Displacement Front During The Production of The Oil Well of The Russkoye Gas-Oil Field
More LessSummaryTo solve practical problems of development during waterflooding, it is of great importance to predict the movement of contacts of formation fluids, as well as to control and regulate the dynamics of their movement. This makes it possible to optimize the field development system, to correctly determine the number and location of production and injection wells in the fields under natural and artificial modes of their operation. The author of the work, based on the analysis and generalization of theoretical material, obtained a method for calculating the main technological indicators of development: the time of complete displacement of oil by water, the flow rate of oil and water at the moment of flooding, the position of the oil displacement front at any time and the pressure value at the water-oil interface at any moment of time. The solution of the problem on the basis of the obtained algorithm for the conditions of a particular field showed that with an increase in the difference in viscosities of water and oil, a decrease in oil recovery is observed due to the growing instability of the waterflooding process.
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The Method of Filtration Pressure Waves to Identify the Heterogeneity of Reservoir Properties
Authors E.A Marfin, M.N Ovchinnikov and A.A AbdrashitovSummaryThe impact on the reservoir with sound vibrations leads to a local change in its filtration properties. The permeability of the formation near the well with a working oscillator increases, the viscosity of the oil decreases. In this paper, the process of propagation of filtration pressure waves in such a reservoir is considered. Calculation of the amplitudes and phases of such hydrodynamic waves makes it possible to identify the location of zones of heterogeneity in the reservoir. The method of filtration pressure waves can be used to assess the effectiveness of acoustic stimulation of the formation.
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Applying Geochemistry Methods to Identify Promising Objects in Unconventional Reservoirs
Authors A.V Ermolovsky, A.Y Kuklinsky, M.A Nevestenko, E.V Zubareva and Y.S TarasovaSummaryToday Bazhenov formation is one of the most challenging and high-potential objects for geological research and oil exploitation. It is unconventional reservoir with low permeability and number of individual alternations with different degree of oil saturation. Determination of perspective intervals is posibble with the use of complex geochemical analysis. The report presents example of oil accumulation zone ranking in Bazhenov formation sediments of well by geochemical data. Alternations segregation is clearly traced in different value of geochemical parameters. This can be helpful for core-oil correlation and fracture growth control after hydrofracturing.
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Comparative Analysis of Methods for Determining Fracture carbonate Reservoirs
Authors L Krasnoshchekova, A Volkova, A Garsia, V Merkulov, M David and G SerkinaSummaryThe integration of geophysical methods of various scales (thin sections, core, well logging, seismic) allows a more reliable assessment of the natural fractures preferred directions in the rocks. It should be noted that borehole data give more accurate results at the micro and mesoscale, and seismic methods (macroscale) are intergal characteristics over a large area and are used to analyze the features of fracturing in the interwell space.
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Origin of Silicone Sediments in The Lower Part of Verkhneberezovskaya Suite
Authors T.V Glukhov, A.I Kudamanov and M.J NovoselovaSummaryMain geological principles of silicon deposits in the lower part of Verkhneberezovskaya suite (VB3 bench) were investigated. Lithological composition, occurrence aspects and source rock of VB3 bench were determined. VB3 thickness map was created. Authors investigated depositional mechanism considering Santonian and Campanian paleographics.
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Tectonics Impact on Sedimentation Process of Western Siberian Upper Cretaceous Deposits
Authors A.I Kudamanov, S.E Agalakov, M.J Novoselova, T.V Glukhov, T.M Karikh and V.A MarinovSummaryAuthors investigated main aspects of tectonics impact on sedimentation process of Western Siberian Upper Cretaceous deposits. Four seismic sequences were delaminated in Upper Cretaceous deposits in which several benches were determined. Periodic regression episodes in Upper Cretaceous depositions were detected. Tectonic faults influence on stratigraphic units geological structure was defined.
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The Use of Vector Finite Element Method for Solving the Problems of Three-Dimensional Induction Logging
Authors P.A Domnikov, Y.I Koshkina and M.V IvanovSummaryThe computational costs required to calculate three-dimensional fields in geophysical problems can be huge. Vector finite element methods allows constructing mathematical models directly in terms of vector variables, since vector basis functions are used. When using the finite element method, the main computational load, as a rule, falls on the solution of systems of linear algebraic equations obtained as a result of the finite element approximation of the boundary value problem. This paper investigates the efficiency of using various methods for solving linear systems obtained as a result of using the vector finite element method for the direct problem of induction logging.
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Generation Conditions of Super-Reservoirs of The Vasyugan Formation in West Siberia
Authors I.A Lebedeva and A.I KudamanovSummaryThe generation of terrigenous super reservoirs is not always determined by the primary sedimentation conditions and the quality of sand material; often reservoirs with good reservoir properties are formed during diagenetic changes in rocks. Reconstruction of diagenetic processes and superimposed changes in sedimentary material, leading, in the multimillion-year history, to the improvement of reservoir properties, is a very difficult task. The purpose of the study was to reconstruct the generation conditions of JV1 super-reservoir zone in the area of Accumulation 4 of Bakhilovsky mega-sewell.The following objectives were solved: 1) Define and describe the “super- reservoir” concept (lithological and petrophysical properties, well logging curves, effect of development). 2) Define sedimentation conditions, future super reservoirs, Upper Jurassic formation JV1(1-2) and JV1(3) at the Bakhilovskoye field. 3) Analyze the reasons for super reservoirs generatoin and effect on development. The tectonic activity of the territory predetermined the super-reservoir formation condition within the Vasyugan Formation of Bakhilovskoye Field. Deep faults created, on the one hand, favorable conditions for the accumulation of hydrocarbons, on the other hand, conditions leading to the destruction of accumulation by inter-reservoir fluid flows forming secondary oil and gas accumulations. Referens 1) Detailed GDE mapping of the Upper Jurassic within the Verkhnekolik-Egan and Bakhilovsky License Area, east of the Khanty-Mansi Autonomous District, 2009, Contract No. VNG-18-817/08/TNNC-3081/08, dated 11.02.2008,TNNC. 2) Nassonova, N.V., Romanchev, M.A., 2011, Geodynamic control of oil and gas content by shear faults in the east of West Siberia, Geology of Oil and Gas, Vol.4, p. 8-14
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Full Wavefield Reverse Time Migration
Authors M Davydenko and D.J VerschuurSummaryFull wavefield reverse time migration allows to utilize mutliple sacttering and handle complex subsurface models.
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Predictive Assessment of Hydrocarbon Accumulations in Permian-Triassic sediments by The Method of Basin Analysis in The Water Areas of The Central Caspian Oil and Gas Region
Authors R.N Mustaev, R.A Mamedov and E.S GaponenkoSummaryThe Central-Caspian oil and gas area is almost entirely located in the water area of the Middle Caspian and tectonically encompasses the Middle Caspian system of arched uplifts and the North Absheron depression. The main productive complexes are Triassic and Jurassic deposits. The most probable areas of HC accumulation in Jurassic reservoirs in the Central-Caspian oil and gas area are located mainly in their near-edge parts. For the complex as a whole, the share of liquid hydrocarbons in the reservoirs is about 38% for the second type of kerogen and the share of gaseous hydrocarbons is 62% for the third. In the Triassic complex, hydrocarbon accumulations predicted mainly in the southeastern and central parts of the Central-Caspian oil and gas area, to a lesser extent in the near-field. The share of liquid hydrocarbons in the predicted accumulations is 80%, respectively, with the second type of kerogen, and the share of gaseous hydrocarbons was 17% with the third. The modeling results made it possible to identify the main hydrocarbon systems on the territory of the Central-Caspian oil and gas area, and the obtained data are consistent with the actual data obtained in the course of longterm exploration work in the region.
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Informational Capabilities of New Technologies for Coring and Petrophysical Studies of Isolated Core
Authors V.G Mamyashev, B.Yu Khairullin and T.V MamyashevSummaryThe analysis of new technologies for petrophysical studies of discrete-isolated core and its information capabilities is presented. It is shown that in terms of information capabilities, the core sampled using the discrete-isolating technology is superior to the core sampled using oil-based solutions. Highly effective methods for controlling the quality of coring and controlling the content of the isolating agent in it by the chromatographic method are proposed.
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Test Results of Integrated Interpretation Technology of Geological-Geophysical and Field Data for the Purposes of Fracture Zones Prediction and Evaluation of The Rupture Anomaly Conductivity by Scattered Waves
Authors S.S Sanin, A.A Voronin, A.V Kirichek, V.I Kuznetsov and Yu.N DolgikhSummaryAt the seismic data complex interpretation stage we outline the geometric boundaries of tectonic deformations and make a qualitative prediction of their properties. At the same time, the fault has a certain zone, which includes not only the tectonites of the fault shifter, but also significantly large volumes of rocks where there are plastic and rupture deformations genetically associated with the disorders formations. Such zones can be both fluid permeable and fluid impermeable (non-conductive). According to theoretical concepts, fluid permeable fractures and companion fracture zones appear in the scattered waves with the increased amplitude values, and the fluid impermeable faults do not contain open fractures and do not appear in scattered waves. Forecasting and assessment of the fracture properties and fracture zones based on the scattered waves is possible with the specialized data processing technology from the standard observation systems using the Reflected wave CDP Method (CDP). The report demonstrates the testing results of the specialized FractureCSP processing technology and the application of the developed method of integrating the obtained results with geological, geophysical and field data for the purpose of predicting the fracture zones and assessing the fracture deformations conductivity by scattered waves.
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Deconvolution of Ground Penetrating Radar Data in The Study of Highways
Authors A.A Matyushenko, A.A Ivanov and A.I PosereninSummaryOne of the most significant problems of GPR in the study of roads is a large number of low-contrast boundaries that need to be traced at depths of 5-10 m with a radarogram resolution of 10-20 cm. Within each layer, interlayers with a thickness of several centimeters can be distinguished, the presence of which, with sufficient the resolution of radarograms can be indirectly established by the wave field between extended reflective boundaries. Separation of closely spaced reflected and diffracted waves on radarograms is an important task of GPR. Deconvolution is aimed at increasing the resolution of GPR. The paper shows the results of applying deconvolution to ground-penetrating radar data in the study of highways.
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An Example of Neural Network Algorithm Application to Determine Lithology Using Well Logging Data in a Terrigenous Section of The Republic of Tatarstan
Authors J.M Davronov and B.V PlatovSummaryAccurate determination of lithology based on well logging data is an important task in the study of oil and gas fields. Large fields can include hundreds of wells, which affects the time required for interpretation. In this work, the authors tested the use of a neural network to determine lithology from well logging data. The geological structure of considered area includes rocks of the crystalline basement of the Archean-Early Proterozoic age and a sedimentary cover, represented by deposits of the Devonian, Carboniferous, Permian and Quaternary systems. Oil deposits are distinguished in the deposits of the Upper Devonian and Middle Carboniferous (Adbulmazitov R.G. et al, 2007). For the analysis, the authors selected a productive interval of Devonian terrigenous deposits. There are three learning models: “supervised”, “unsupervised” (self-learning), and mixed (Darpa, 1998, Hertz et al, 1991). To solve the problem of finding the best porosity value set in this article, the supervised model was used. This means that during training, the neural network relayed on "correct answers" for input data. In the process of learning, the weights of connections between neurons in the network were adjusted in the way that the network gives responses closest to the correct result.
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Technological Parameters Analysis of Heat Treatment of Well Through a Downhole Heater
Authors E.O Butorina, A.S Golubov, Y.A Donskoj and A.P RatushnyjSummaryOne of the most important directions in the national Russian energy policy strategy until 2035 is the development of hard-to-recover reserves. In the word «hard-to-recover reserves» such categories as bituminous, extra-viscous, high-viscosity oil are included. In the practice of operating mechanical wells, the issue of introducing thermal effects by heating oil with a heater without shutting down the well itself becomes important. At present, the theoretical and working field experience with downhole heaters has been accumulated, however, no systematic ideas about the effectiveness of this kind of method have been presented. This paper considers the issue of analyzing the thermal effect in the well during the operation of the downhole heater and determining the most optimal operating conditions. In the study, the first stage was to assess the effect of heating the fluid and the bottomhole zone of the productive formation on its physico-chemical properties. At the second stage, the technological characteristics of the heater were calculated depending on the individual oil field properties. As a result of the work, it was found that this method is applicable for shallow, vertical wells with high-viscosity oils with a reservoir temperature below 30 degrees.
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Specialized Structural Mapping and The Specifics of its Application for Reconstructions of The Stress-Strain State of Rocks within Structure Complex Hydrocarbon Fields
Authors K.Zh Seminsky, Yu.P Burzunova, A.K Seminsky and A.S CheremnykhSummarySpecial structural mapping based on the structural-paragenetic analysis of tectonic fractures in rocks is used to decipher the fault-block structure of the earth's crust using special types of paragenesis (the result of staged fracturing). Using the example of the Kovykta gas condensate field, it is shown that the method is effective for reconstructing the stress-strain state of complex structure hydrocarbon fields, since for its application, it is sufficient to have data only on the orientation of the fractures (azimuth and dip), which can be obtained by attributive analysis of the seismic information cube. This made it possible, using the data of detailed 3D seismic, to establish the structure of the discontinuous network formed during the tectonic development of the territory, to detail the type of stress state for the sedimentary cover and individual rock complexes, and also to make zoning in terms of the intensity and nature of disturbance by fractures. In practical terms, these materials represent a reliable basis for constructing tectonophysical models of the dislocation of licensed areas, which, along with the available production information, should be the basis for predicting the conditions for drilling exploration and production wells.
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Prevention of Wells Self-Stagnation in The Achimov Deposits of The Urengoyskoye Gas Field
By M.D VoronovSummaryThe accumulation of fluid at the bottom of producing gas wells is one of the most pressing problems in the fields of the Far North, which are at the final stage of development and gas production. Water in a vaporous form comes from the reservoir into the well together with gas, condenses, and in the case of the upstream velocity in the column below the critical value, flows down to the bottom of the well. The accumulation of borehole water, which occurs at gas flow rates below a certain critical value, seriously complicates the technological process of gas production, dramatically reduces well flow rates up to spontaneous shutdown. This problem becomes more and more urgent every year, as the fund of such spontaneously stopping wells becomes more and more every year. One of the promising technological solutions to support the work of producing wells is the equipment of the trunk with concentric lift columns.
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Forecast Assessment of Hydrocarbon Accumulations Within The Western Kuban Oil and Gas Region
Authors Yu.V Scherbina, A.A Markin and D.A UrusovaSummaryTectonically, the West Kuban NGO corresponds to the Indo-Kuban forward trough, which borders the folded structure of the Northwestern Caucasus. The deflection is made synorogenic molasse formations of Maykop and Neogene-Quaternary the. In cross-section, the West Kuban trough is characterized by asymmetry: the southern side is narrow, steep, complicated by geosynclinal folding; the northern side is flat, wide, and slightly disturbed. 128 oil and gas fields, including 90 oil and gas, 23 gas, and 15 gas condensate fields, have been discovered within the Western Kuban OGR
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Evaluation of The Applicability of The Technology of Gravimetric Correction of The Depth-Velocity Model of The Environment by Means of Synthetic Modeling
Authors T.A Mingaleva, G.D Gorelik and O.F PutikovSummaryIn this work, on a synthetic model, an algorithm for correcting the velocities of elastic waves in rocks is tested using information on densities obtained from gravimetric materials using inversion. The task is relevant for hard-to-reach and poorly studied areas. It is assumed that, due to the statistically significant dependence of the velocity and density properties of rocks, the density model can improve the results of structural inversion of seismic data and improve the quality of building a depth model.
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Technique for Reconstructing The Acoustic Logging Curve for Determining the Elastic-Mechanical Properties of Terrigenous Reservoirs on The Example of Field in The Perm Krai
Authors A.S Muryskin and A.S NekrasovSummaryCurrently, information on the mechanical properties of collectors is becoming more and more relevant. One of the sources of this information can be acoustic logging. However, in many old fields, such studies are not available in many wells. The article describes a technique for reconstructing the acoustic logging curve based on the results of neutron logging from a standard set of geophysical well logging. The studies were carried out on terrigenous reservoirs of the oil field of the Perm Krai. Comparison of synthetic and real acoustic logging curves is made out. An algorithm is presented for calculating the elastic and mechanical properties of rocks (such as Young's modulus, shear modulus, Poisson's ratio) from a synthetic acoustic logging curve. The algorithm was implemented in software using the Lazarus IDE in the Object Pascal programming language. The implemented algorithm allows obtaining valuable information about the elastic-mechanical properties of rocks for building a geomechanical model of a reservoir or creating a hydraulic fracturing design. A comparison of the results of determining the elastic-mechanical characteristics between the real and synthetic curves is given, as well as the results of the core analyses. Conclusions are made about the correctness of the application of this technique.
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Automation of Process of The Setting Up Well Model in Updating of The Integrated Asset Model for Wells Operated by Sucker Rod Pumps
Authors K.I Muryskina and A.S MuryskinSummaryA well model is one of the important elements of the integrated asset model (IAM). The nodal analysis method shows the both reservoir and well (deep-pump equipment) operation point according to VLP/IPR intersection. The IPR curve characterizes the ability of the formation to supply fluid to the wellbore under the influence of the difference between reservoir and bottom-hole pressure, the VLP is a characteristic curve of the lift column that determines the flow movement in the well from the bottom hole to the wellhead. Both curves represent the bottom-hole pressure and flow rate functional relationship. The IPR and VLP intersection point is the subject of nodal analysis research. There is the condition of pressures and flow rates equality for the curves at this point, so the operating point characterizes the efficiency of the well/reservoir system. This article considers an algorithm for automated selection of the operating point of VLP and IPR curves intersection using the Petroleum Experts Prosper software. The automated selection process is implemented using the VBA script in in the MS Excel. By this stage the program has been applied only for wells operated by sucker-rod pumps.
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Petrophysical View on The Differentiation of Reservoir Properties of The Vasyugan Formation
By B.N EnikeevSummaryIn the conditions of Western Siberia, the problem of assessing the saturation of low-resistance reservoirs is widely known (often explained by a complex of operating factors from the content of ferruginous or clay minerals to fracturing). The problem of the difference in the physical properties of the upper and lower Vasyugan members is also popular (the latter has a reduced resistance, regardless of its productivity). The report puts forward ideas about the specifics of the studied object based on empirical data, analyzes various considerations and hypotheses about the petrophysics of this object, and presents the results of visual and regression analysis.
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Transient Electromagnetic Method Application for Waterbearing Reservoir Mapping in The Republic of Sakha (Yakutia)
Authors A.A Otsimik, O.V Tokareva, A.I Ilin, I.V Buddo, V.A Lapaev, A.N Belysh and A.N BoshenkoSummaryThe transient electromagnetic method in the near field zone in shallow mode (sTEM) has established itself as an effective method for mapping aquifers in the territory of Yakutia. This is well known that in this region permafrost rocks can negatively affect the water availability of reservoirs developed in the upper part of the section. To map of the permafrost distribution and the position of water-bearing reservoirs the sTEM survey was carried out, capable of studying the geoelectric structure of the section to depths of 500 m. The relevance of the study is due to lack of technical water for reservoir pressure maintenance in the botuobinsky horizon. The waterbearing reservoirs prediction approach is based on a comprehensive analysis of geological and geophysical data (seismic, electromagnetic, drilling data and geophysical studies in wells), allows you to recommend areas of well location for technical water supply, to predict the intervals of possible geohazards during drilling.
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Comprehensive Approach to Study of Inherited Forming of Middle and Upper-Jurassic Sediments on Example of Tevlinsky-Russkinsky Field Formations US2, US1
Authors D Alexandrov, I Peshkova and V VingalovSummaryZonal genesis model of upper Tyumen and Vasyugan suite sediments (YuS2 and YuS1 formations) is provided. Cyclic depositional environment changes, local paleotopography aspects and local secondary reprecipitation caused by high-energy water steams determine facial zoning that was described.
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Geophysical Studies of Permafrost Within The Oil and Gas Fields in The Yamalo-Nenets Autonomous Okrug (Yamal Peninsula)
Authors N.V Misurkeeva, I.V Buddo, A.S Smirnov, Y.A Agafonov and I.A ShelokhovSummaryThe challenging climatic and engineering-geological settings of the Yamal Peninsula, located in the permafrost zone, significantly complicate the development of the region. The permafrost section is characterized by a complex structure. The section of the Yamal Peninsula to a depth of 500 m was studied with transient electromagnetic method (TEM). A thick stratum of icy permafrost rocks, a large number of taliks of various types have been mapped. In the thermokarst lakes zones, which are an active source of methane emissions into the atmosphere, vertical resistivity anomalies penetrating the permafrost strata were mapped.
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Additional Capabilities of Geosteering in 3D Geomodel Environment
More LessSummaryPaper summarizes experience of navigating horizontal wells using general propose 3D geological models. Advantages over simplifies geosteering techniques based on simplified 2D representations are duscussed.
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Development and implementation of a numerical solution for modelling the hydraulic fracturing process as part of an integrated geomechanical modelling system
Authors M.S Eryashkin, F.F Khusnutdinov, S.V Chaynikov, E.V Danilov, A.V Abramovich and A.Yu PetukhovSummaryHydrofracking crack (HF) behaviour near tip determines the local dynamics of the propagation front and, consequently, affects the overall geometry of the HF. Several physical mechanisms can compete for the determination of the behaviour near the crack tip. Presented research work considers the simultaneous interaction of crack resistance, fluid viscosity, and filtration, which together cause the solution to change at multiple scales in the fracture tip region. Research techniques described unique asymptotics to determine the position of the crack vertices and speed up the model calculation process.
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Uncertainty Analysis of Geologic Parameters of Upper Jurassic Deposits of Western Siberia on The Example of Sredne-Nazymskoe Field
Authors O.O Kim, V.D Nemova, T.A Matuhina and A.M PogodaevaSummarySredne-Nazymskoye field is the main experimental-industrial testing ground for LUKOIL for the study of the Upper Jurassic deposits of Western Siberia. The 3D geological model of the field was built. The article is about uncertainty analysis of geological parameters. Uncertainty analysis was carried out on the 3D geological model. Big geological data was interpreted. The histograms of distribution were created for each geological parameter. The results obtained are applicable for forecasting development options, assessing their likely profitability. This approach is an additional decision-making tool when planning the development and additional study of the field. The second application of these calculations is the use of histograms of the distribution of calculated parameters when assessing territories of a similar geological structure as a reference object. The methodology allows estimating the resources of licensed areas with the distribution of probabilistic forecast resources. The third application of this approach is to assess the sensitivity of the influence of each of the input parameters in modeling on the probability of the volumes of geological oil reserves of the Upper Jurassic deposits.
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Seismic tomography as a way to refine the depth-velocity model of anomalies in the upper part of the section on the example of a deposit in Western Siberia
More LessSummaryThe accuracy of structural constructions strongly depends on the quality of accounting for anomalies in the upper part of the section. It is important that the variety of seismogeological conditions and the differences in the field methods of observation when registering the wave field determine the complexity of developing universal methods that can uniquely solve the problem of accounting for the inhomogeneity of the HRD. This is relevant for both three-dimensional and two-dimensional seismic survey materials, regardless of the observation systems. In addition, depending on the area of work, the structure and heterogeneity of the upper part of the section vary greatly, so the structure model and accounting methods also differ from each other, and should optimally take into account heterogeneous quantitative and qualitative characteristics.
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Model of Development of The Yamalo-Kara Region Based on The Complex of Geological and Geophysical Data
By A. N ZaitsevSummaryThis article presents the results of the study of the territory of the Yamalo-Kara region, including the South Kara water area and the Yamal Peninsula, at three levels of research.
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Local 3D + VSP Project, Detailed Seismic Work on Cluster Wells
Authors A. A Shevchenko, A.E Korolev, K.V Baranov and D.K MedvedevSummaryIn the process of additional exploration and operation of oil and gas fields, problems arise in detailing the structure of the near-wellbore space at a distance of 2-3 km from the well. 3D surface seismic images of the environment, observed, processed and interpreted prior to drilling, are usually processed under conditions of uncertainty in the structure of the environment. Without the involvement of borehole information, the velocity characteristics of the medium obtained as a result of processing do not allow obtaining ideal images of the medium and absolutely accurate structural constructions. After the well is drilled, additional seismic observations can be performed, which will help to take into account all the ambiguities that existed during the initial study of the object. To improve the accuracy, detail and reliability of the results of surface seismic survey in the vicinity of the well, it is proposed to use the technology of combined surface-well observations - “Local 3D + VSP project.
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Study of Fluid-Geodynamic Processes in The Section of The Shelf of The Barents and Kara Seas According to Modern 3D Seismic Data
By V.N BorodkinSummaryThe study area is associated with the waters of the Barents and Kara Seas, within which the industrial oil and gas content of the Jurassic-Cretaceous deposits is established, and according to 3D seismic data, signs of vertical migration of hydrocarbons (HC) are observed.
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Assessment of the correctness of the determination of the specific electrical resistance of collectors by GIS devices
By R.A ShishkinSummaryTo determine the electrical resistivity of reservoirs of oil and gas fields, various domestic and foreign devices for geophysical research of wells are currently used. As a rule, when interpreting resistance methods, questions arise at the stage of determining the oil and gas saturation coefficient.
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Using 3D Seismic Exploration to Solve Engineering Problems
More LessSummaryEngineering and geological conditions are determined by the structure, composition and properties of sediments (soils) of the upper part of the section. In order to identify and assess possible geological complications during the drilling of the bottom part of the section, along with areal engineering surveys, 3D seismic data are successfully used.
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Hydrogeochemical and Microbiological Features of UGS in The Aspect of Hybrid Storage of Natural Gases
Authors L.A Abukova, D.S Filippova, E.A Safarova, A.V Bychenkov and R.N AbdrashitovaSummaryThe paper describes the analysis of the microbiological specification and hydrochemical characteristics of the UGS facility located in the aquifer of the Moscow hydrogeological basin. A low abundance of aerobic organotrophic bacteria and anaerobic fermentative, denitrifying and sulfate-reducing bacteria in samples of formation water from UGS waters was shown. A high representation of bacteria of the genus Marinobacter, corresponding to the marine genesis of stratal waters, was noted. This testifies to the insignificant anthropogenic impact on the geological environment of the long-term operation of the Gdov horizon and the ecological reliability of the operating technologies used. Microbiological monitoring and zoning of the UGS territory according to the prevalence of the most typical microbiological communities will contribute to quality control during the operation of the UGS facility.
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