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Tyumen 2021
- Conference date: March 22-26, 2021
- Location: Tyumen, Russia
- Published: 22 March 2021
21 - 40 of 88 results
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Creating Unified Regional Models of High Detail in Order to Increase The Resource Base
Authors V.G Shchergin, S.A Lats, A.B Smetanin, E.A Shchergina and M.R MazitovSummaryThe main reserve for the development of oil production in the fields are pre-estimated reserves. At the same time, the distribution of reserves is uneven across territories, deposits, and stratum. Despite the high level of exploration in some areas, new deposits are being discovered. Expanding and changing the area of known deposits, detailing and identifying structural features, which generally affects the assessment of the state of reserves and determines the conditions for their further operation. To develop both current and long-term exploration plans, it is necessary to have a holistic view of the Geology of the region, which should be based on the study and establishment of regularities of the geological structure and oil content. The basis for this is a unified concept and methodological methods of research using the full volume of geological and geophysical materials. To this end, large-scale regional projects have been initiated on the territory of the Company’s operations in Western Siberia, covering large territories with highly detailed geological surveys. Currently, research has been completed on the Northern part of the territory of activity in the Latitudinal Ob region. The object of the study was Jurassic (Y1 and Y2) and Neocomian deposits (BS10-BS11 complex).
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About Interpretation of Seismic Data Based on RTH Speed-Attributes
Authors G.N Erokhin, E.V Anokhina, V.M Bryksin and S.A ShevchenkoSummaryOne of the key challenges of today’s Geophysics in field exploration and development is to improve the detail and quality of the seismic section without increasing the cost of field work. As a result of processing data using the RTH method, high-resolution seismic sections and cubes are obtained. The developed method of interpretation of the obtained seismic attributes allows solving various interpretation problems with a high degree of reliability
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Practical Methods of Deghosting and its Application History over The Past 10 Years
Authors V Kalashnikova, R Overas, T.R Sharafutdinov, A.Z Nedostupov and V.V LancevSummaryWe have shown an overview of the practical deghosted processes and it requiring resources over the last 10 years. The key to a successful seismic deghosting process is to find an appropriate deghosting operator for both source and receiver ghosts. Depending on the different survey configurations, streamer types, and geologic settings, a solution can be derived in different domains. It can be both FK, Tau-P, Xt-domains, or time domain. These domains are suitable for any streamer configuration and the search for the deghosting operator performed in floating windows. Since ghost operator depends on dips, then in Xt-domain a result has conflicting dips. This problem can be solved by estimation parameters in local windows with constant dips sections. In the Tau-P domain, data from different receivers are mixed, and for a streamer with variable depth, it complicates. Therefore, a special algorithm working in local Dip-Xt domains helps for a streamer with significant variations in depth. To obtain a stable solution for the entire seismic section, the estimation of ghost delay and reflection coefficient should be performed in a sliding window. The most robust method is a T-X/F-X Bootstrap performed in sliding windows that can be applied in any domain.
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Prospects for Methionine Production at «Nevinnomyssky Azot» Plant
Authors A.R Khakimov, D.I Daudi, A.A Ishmurzin and N.P KodryanuSummaryThe Development of own facilities for production of complex products is one of the promising areas of petrochemistry, which allows not only to get rid of dependence on other countries, but also to stabilize prices for this product. The implementation of methionine production facilities will make it possible to meet domestic demand for methionine, most of which is imported from abroad. Methionine is used as an additional agent in poultry farming, livestock breeding, which allows to accelerate the growth of animal muscle mass. The Stavropol Krai was chosen as a site for the production of this amino acid, as the right logistical position will reduce transportation costs. The Nevinnomyssky Azot facility of the company «EuroChem» has the necessary resource base, due to the need for nitrogen-containing compounds. Based of this problem, our team proposed a solution to develop a growth point for the production of food additives based on the existing «Nevinnomyssky Azot» facility in Stavropol Krai, where large areas of fertile land are located. We considered that the development of agrochemistry in this region would help stimulate the agricultural sector of the fertile region of Russia. This solution will also completely solve the issue of methionine import substitution.
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Practical Application of CRS Processing to Improve the Imaging of The Geological Environment
Authors A.Z Nedostupov and T.R SharafutdinovSummaryLow initial traceability of reflected waves on 2D/3D CDP seismic data is the reason for obtaining conflicting geological models, which leads to problems when drilling wells, which is unacceptable in the current economic situation. The main factors influencing the traceability of reflected waves can be identified: the complex geological structure of the environment, technical and human factors, the complex geological structure of the upper part of the section. The use of standard seismic data processing techniques cannot fundamentally solve these problems. One solution relates to the use of CRS (Common Reflection Surface) technology. The method of the common reflecting surface, which allows, based on the attributes of the wave field, not only to improve the detail and increase the signal-to-noise ratio, but also to carry out regularization in different sortings, taking into account the velocity characteristics of the imaging.
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Sources, Conditions of Generation and Accumulation of Hydrocarbons in Sedimentary Basins of The Laptev Sea Based on The Results of Basin Modeling
More LessSummaryA digital structural model of sedimentary complexes in the Laptev sea allows us to trace and identify the boundaries of sedimentary basins and assess the scale and conditions of sedimentation, as well as to predict the areas of development of oil and gas source strata, collector and reservoirs. The generated basins model was detailed by selecting GAUS elements in it. In the central and southern part of the Laptev Sea basin, gas deposits are expected in all complexes, which is due to the increased heat flow and, as a result, a high degree of transformation of the oragnic substance of the oil and gas source rocks. Analysis of the results shows that a significant hydrocarbon potential is expected in the Paleogene clinoforms of the Eastern Arctic. At present, this complex is undervalued and additional study, including detailed mapping of its internal structure, is required for resource assessment.
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Justification of The Prospects for Oil-Bearing formations BS11-BS12 of The Tevlinsko-Russkinskoe Field Due to The Intervals of Layered Reservoirs
Authors S.A Lats, E.A Shchergina, A.B Smetanin, V.G Shchergin, S.V Arefiev and R.R UnusovSummaryJustification of oil-bearing potential due to the intervals of layered reservoirs is a non-standard task. Traditionally, when calculating reserves in the volume of oil-saturated reservoirs, only homogeneous reservoirs are mainly taken into account. However, there are intervals in the section, composed by frequently interbedded thin layers of sand-siltstone material with clays, which, under the standard interpretation, are classified as impermeable rocks. Despite this, there are successful practice examples of layered reservoir intervals development in wells that are not included into account in the reserves estimation. Accordingly, the completed updating of the geological model is an important stage for improving the efficiency of development, operation planning to introduce additional volumes of reservoirs to exploitation, forming a program for further study for increasing hydrocarbon resource potential. A concept method for detecting layered reservoirs in well sections was proposed by combining the results of core research, well testing and exploitation, and a well logging complex. Based on the concept, calculation methods are shown for identifying intervals of layered batch in well sections, calculating reservoir parameters - layered clay content, effective thicknesses, porosity, and oil saturation. Accordingly, the developed method allows you to perform calculations for all wells to create a database of geological and geophysical parameters for modeling. Based on the updated model, an increase in the oil-bearing potential of the BS11-12 reservoirs of the Tevlinsko-Russkinskoe field was detected, which implies to exploitation of additional reservoirs volumes.
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Influence of Rock Deformations on The Time of Oil Production in an Oil Field
Authors V.V Poplygin, E Kozhevnikov, M Turbakov and E RiabokonSummaryOil production at the field takes several decades. The timing of oil production is influenced by the properties of rocks and fluids and the technological parameters established by the design documentation. In general, it can be noted that as the rock permeability improves and the crude oil viscosity decreases, the oil production time in the field will decrease. As the distance between the wells increases, the production process may slow down. A decrease in bottomhole pressure will lead to an increase in drawdown, which contributes to an increase in well production rates. However, with a decrease in bottomhole pressures in the bottomhole zones of wells, deformations of rocks occur. Deformation of rocks decreases the permeability. With a decrease in permeability, oil production time increases.
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Geological Structure of The Pre-Jurassic Complex Within The Elizarovsky Trough of The Frolov Megadepression and The Galyanovsky Nose of The Krasnoleninsky Arch According to Seismic Data CDP 3D
SummaryThe taphrogenic complex in the pre-Jurassic basement of Western Siberia contains hydrocarbon deposits. Interpretation of 3D seismic data allows detailed mapping of its distribution areas.
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Structural and Tectonic Substantiation of Promising Zones of The Shelf of The East Siberian Sea
By R.A MamedovSummaryThe East Siberian Sea is of significant interest from the point of view of hydrocarbon prospecting, however, the assessment of their hydrocarbon potential is difficult due to poor geophysical knowledge and the absence of wells. In such conditions, the method of geological analogies is often used. As a result of the application of the technology of basin modeling by the method of geological analogies, the Petromod program has created structural-tectonic models of the basement and sedimentary cover in the eastern Arctic waters, which are included in a single model due to the fact that the studied sedimentary basins are part of one continental margin and their boundaries do not always coincide with the conditional boundaries of the water areas. Structuraltectonic analysis indicates a high hydrocarbon potential and makes it possible to identify the most promising areas and objects, as well as to outline the directions for further exploration work.
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Effective Pressure and Bedding Depth Influence on The Oil Fields Reservoir Properties (On The Example of The Northern Perm Region Oil Fields)
Authors M Wiercigroch, E.V Kozhevnikov, M.S Turbakov, V.V Poplygin and E.P RiabokonSummaryThe efficiency of oil production is influenced by various factors, the main of which are the reservoir properties of oil-bearing formations - porosity and permeability. Porosity determines the storage capacity and permeability determines the filtration ability. Reservoir properties generally depend on the type of reservoir, the particle size of the reservoir rock, the presence of clay particles, etc. However, the formation depth has the greatest influence on the reservoir properties. For all types of rocks, permeability and porosity decrease with the bedding depth increasing. The volume of the pore space and the permeability of rocks also depends on the effective pressure. In this work, on the example of the northern Perm Region oil fields, confined to layers of the same geological age, the influence of the layer’s geological characteristics on their reservoir properties is assessed. When analyzing the reservoir properties of 40 oil layers, equations that describe the influence of the depth and effective pressure on the reservoir properties of oil layers were obtained. Analytical dependences of the influence of porosity on the permeability of rocks are also obtained.
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Artificial Intelligent Based Post-Stack Inversion Implementation for Reservoir Prediction on Regional/Local Levels on Example of Mega Seismic Data Cube in Norwegian Sea
Authors V Kalashnikova, R Overas, T.R Sharafutdinov and G.R VakhitovaSummaryThe article describes the interpretation of possible sandstones in the Norwegian Sea shelf using 3D post-stack mega seismic, which was inverted using post-stack inversion based on artificial intelligent algorithms. That helped to estimate velocity and density independently that were further used to estimate the volume of clay, porosity, and reservoir quality attribute. The proposed interpretation was verified by using 300 drilled wells including newly drilled ones. We show predictions of sand bodies in the Cretaceous and Jurassic that were properly identified. The presented method helps to add value when working with only post-stack seismic. Taking into account the seismic price and required computing resources, the method turned out to be very efficient.
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Application of Incorrect Task of Filtration Theory to Wells Survey Interpretation of Low Permeability Bazhenov Formation Layers
Authors D.A Aminev and A.V EvtyukhinSummaryMathematical model describing thermohydrodynamic processes in “layer-vertical well” system are created. Based on this model own program code is developed. Numeric math modeling of correct and incorrect filtration theory tasks are made for one Bazhenov layer conditions. It allows to make well survey interpretation and predict oil production for real formations accounting their thermobaric conditions, existing kerogen-containing inclusions and filtration and capacitance characteristics.
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Comparative Analysis of Thermogas Method and Multi-Stage Hydraulic Fracturing Application Efficiency at Bazhen Formation Layers
Authors E.V Zinkevich and N.N DievaSummaryTwo the most perspective methods of Bazhen oil field, which porous rock contains hydrocarbons in form of kerogen, development are compared in this paper. The main principles and some results of thermogas exposure are presented. Experience of hydraulic fracturing applying to considered rock is described. Based on comparative analyze of these methods efficiency some conclusions about its combined application potential on Bazhen formation are made.
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Assessment of Oil and Gas Potential of The South Tatar Petroleum Region
Authors D.A Urusova and S.G SerovSummaryThe purpose of this work is to study the geological structure and assess the prospects of oil and gas potential of the studied territory, and more specifically, the South Tatar petroleum region, which is part of the Volga-Ural petrolium province.
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Assessment of Petroleum Potential of The Anabar-Khatanga Petroleum Region Based on Basin Modeling
Authors E.S Gaponenko and S.G SerovSummaryThe main purpose of this work is to assess petroleum potential of the Anabar-Khatanga petroleum region within the Anabar-Khatanga saddle. The studies were carried out in the PetroMod software package (Schlumberger) based on basin modeling technologies, which included modeling geological processes in a sedimentary basin throughout the entire period of its formation, modeling generation-accumulation hydrocarbon systems, identifying promising areas for further exploration.
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Fluid Prediction on Seismic Data Using Different Machine Learning Methods
Authors V Kalashnikova, E Karaseva, R Overas and T.R SharafutdinovSummaryAuthors have investigated possibilities to predict the type of fluid from stacked seismic data using machine learning algorithms. Despite the small data sets of only four wells, the prediction shows promising results. Firstly authors investigated prediction on the wells: using wells-logs sets as learning and recognition. Then, authors used well-logs data, synthetic seismic trace and its derivatives for learning, and seismic and its derivatives for recognition.
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Prospects for The Use of Microwave Heating of The Bottom-Hole Part of The Well Formation in The Development of Gas Hydrate Fields
Authors K.G Tyumerova and P.N SetsyukSummaryGas hydrates (clathrates) are crystalline compounds that form when water forms a cellular structure around smaller gas molecules. The tendency of the depletion of traditional resources and the unprofitableness of their development due to a decrease in production rate actualizes the issue of the development of gas hydrate deposits. The idea of using microwave heating to extract gas hydrates overlying a field under development suggests that the development of this type of hydrocarbon will be the most profitable. For the production of gas hydrates, two methods can be combined: reduction (depletion) of pressure in the reservoir and heating of the bottomhole zone due to microwave heating.The first method will create conditions for the decomposition of gas hydrate into gas and water. The microwave heating method will allow maintaining the required temperature of the gas hydrate. The considered methods of developing the Turonian gas hydrate deposits make it possible to operate them together with the Cenomanian gas condensate field.
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Intrusive Magmatism, Influence on The Formation of Generation-Accumulation Hydrocarbon Systems of The Baikit Anteclise (Eastern Siberia)
Authors S.G Serov and E.S GaponenkoSummaryThe study of the evolution of the sedimentary-rock basin of the Baikit anteclise was carried out by the method of numerical basin modeling.It is taken into account that the temperature effect of intrusion is expressed in an instantaneous increase in temperatures in the zones affected by the intrusive process and the further spread of temperatures into the surrounding sedimentary layers.The results of modeling the process of organic matter maturation in the parent rocks indicate that by the time of 260 Ma, the OM of the parent rocks begins to transform. And by the time of peak values of heat fluxes (250 million years ago), all Riphean and most Vendian oil and gas fields had fully developed their generation potential. Calculation of the reflectivity of vitrinite and the temperature effect of intrusion made it possible to determine the patterns of distribution of oil and gas generation zones to each of the regional complexes. As a result of intrusion intrusion, the areas of liquid hydrocarbon storage have significantly decreased for both complexes under consideration. On the basis of these ideas about the safety of hydrocarbons in different thermobaric conditions, the zones of gas accumulation and the zones of oil and gas accumulation were divided.The thermal effect of the Siberian plume led to the complete "depletion" of the generation potential of all Riphean and most of the Vendian source rocks. The main oilbearing prospects are associated with the southern territories, while in the north only gaseous hydrocarbons are predicted.
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LWD-Based Geosteering Models Variations Research
Authors N.M Orlov, A.D Kazakov and M.A SrebrodolskayaSummaryThis work examines one problem never researched before - variations in independently modeled geosteering scenarios. Usually the effectivenes of geosteering is measured by productivity of the well (effective to total lenght ratio, etc.) which does not consider accuracy of geosteering itself. We try to find different way of measuring geosteering effectiveness by deriving data quality and human factor impact. We proceed with analyzing repeatability of scenarios modeled independently for one same well.
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