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Tyumen 2021
- Conference date: March 22-26, 2021
- Location: Tyumen, Russia
- Published: 22 March 2021
1 - 50 of 88 results
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The Reflected Electromagnetic Wave CDP Method (ECDP) Testing Results and Possibilities for The Future Oil and Gas Exploration
SummaryToday, thanks to development of technologies and research in the field of propagation of the electromagnetic waves in the real physical media, it has become possible to make shooting, record and office processing of the reflected electromagnetic waves using methodological schemes, principles and processing tools typical for seismic exploration with the Reflected wave CDP Method (CDP) for oil and gas. The report presents the results of experimental and methodological works on testing the Reflected electromagnetic wave CDP Method (ECDP) at one of the oil and gas fields in the north of Western Siberia. There was used the experimental Russian radioradar equipment of the GROT-12 series. The depth proven by the vertical velocity spectrum according to the CDP scheme was 550 m. There are reserves for the further significant accuracy increase in the accuracy, quality and the sounding depth based on the improvement of the system of synchronization, ratio and amplitude range expansion. Investment into R & D modification of the equipment gives prerequisites to create the first in the world hardware and methodology complex of the 2D Reflected electromagnetic wave CDP Method (ECDP) based on TS (antennas).
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The Influence of Molecular Weight of Polyisobutylenes on Tribological Properties of Polyurea Greases
Authors D.I Daudi and A.Y KilyakovaSummaryThe purpose of this work was to investigate the effect of a thickening polymer additive - polyisobutylene - on tribological properties of polyurea greases. Biocoal in concentration of 5,10,15 mas. % was added to the obtained lubricant samples. The following were analyzed: dropping point (GOST 32394-2013), penetration (GOST 32331-2013), colloid stability (GOST 7142-74) and tribological characteristics (GOST 9490-75). Based on the analysis of the data obtained, it was concluded that the diameter of the wear spot decreases and the dripping temperature increases with increasing concentration of the filler, which affects the effectiveness of its work in the grease. To improve the studied parameters it was suggested to add to dispersion medium a thickening additive - polyisobutylene (PIB) of different molecular weight -10 thousand g/mol, 30 thousand g/mol and 50 thousand g/mol (1%). As a result of the work performed, we concluded that the best tribological properties are the samples in which an PIB additive of 10 (1%) was dissolved in oil.
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Seismic Facies Analysis Based on 3D Seismic Data on Training Field of The Republic of Tatarstan
Authors J.V Gubaidullina and B.V PlatovSummaryRestoration of facies in the inter-well space is an actual issue. If we know filtration-capacitive properties from the core data in the well, which we tied to seismic data, we can trace distribution of facies throughout the territory. And if we will know distribution of facies, we can define filtration-capacitive properties in the interwell space and location of the reservoir. The work was to identify facies using neural algorithm classification by signal shape and seismic attributes. The identified facies: alluvial facies, fresh water facies and shoreline facies. Also, during the work, authors created maps of tulian horizon and identified the facies distribution and location of paleochannels and reef structures of the tulian horizon.
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Determination State of Frozen Saline Soils by Geophysical Methods
Authors I.A Agapkin and P.I KotovSummarySaline frozen soils occupy vast territories of the Arctic coast. , it is necessary to determine the state of frozen soil for construction purposes. Because there are saline soils with a negative temperature, which is higher than freezing point. These soils do not contain ice and have high deformability, low bearing capacity; therefore, they must be identified at the preliminary stage of site investigation. We carried out special laboratory test, where determined different characreristics for calculation (salinity, water content, density, Atterberg Limits, freezing point, velocity of longitudinal waves, electrical resistivity). A method for calculating the concentration of pore solution in soils ( massive cryogenic texture) based on the data of geophysical parameters (velocity of longitudinal waves, electrical resistivity) has been proposed and tested. Using of the obtained value of the concentration of the pore solution makes it possible to calculate freezing point according to the formula recommended by Russian standard SP25.13330.2012. Calculations carried out using the data of electrical resistivity are closer to the experimental values. Thus, knowing freezing point and temperature of soil (according to themperature measurement, which are carried out everywhere in permafrost), it is possible to determine state of frozen soil.
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Increase in Oil Production under Acoustic Stimulation of The Reservoir
Authors E.A Marfin and A.I KadyirovSummaryThis work is devoted to the study of the effect on oil production of acoustic impact, carried out through a nonproducing well. The results of numerical modeling have confirmed the effectiveness of acoustic exposure. An additional increase in oil production is determined not only by the vibration frequency, but also by the distance between the emitter and the production well. The lower the vibration frequency and the closer the emitter is to the production well, the greater the effect of exposure. The results obtained can be used both when choosing a mode of acoustic impact on the formation to increase the efficiency of oil field development, and when developing technical means for generating elastic vibrations.
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BS10, BS11-1 Formations of Tevlinsky-Russkinsky Field Model, with Regard to Pulsating Regime with a Changing of Dominant Sedimentary Material Source
Authors I.A Peshkova, D.V Aleksandrov, E.N Niskovskix and V.M VingalovSummaryThe model of the formation of the Cheuska and Sarman cyclites as a part of a regional-cross-bedding model of the structure of shallow-marine sediments of the Berrias-Valanginian period is presented. The facies zonation of the deposits is shown, due to the cyclical change of sedimentation conditions, the influence of local features of the paleorelief, the formation of areas of secondary re-deposition as a result of the influence of high energy water-flow.
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Forecasting Hydrocarbons Using Transformations of Potential Fields on Example of Yamal Oil and Gas Region
Authors M.Y Oreshkova and A.N FernandesSummaryIn this paper, informative transformants of gravitational and magnetic fields are calculated for predicting oil and gas fields in the Yamal oil and gas region. Transformation is a converting or reformation of original field values into other values using a special mathematical algorithm. Initial materials are digital models of gravitational and magnetic fields of sheet R-42 (Yamal), scale 1: 1 000 000. A scientific forecast of geological structure and prospects of promising areas is carried out. This forecast is based on complex of already available geological and geophysical information for further determination of rational volumes of modern seismic exploration in priority areas.
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Complex Interpretation of Potential Fields Using an Example of Nepa-Botuobinskaya and Angara-Lenskaya Oil and Gas Regions in Order to Identify perspective Areas for Hydrocarbons
Authors A.N Fernandes Mamani and M.Y OreshkovaSummaryTomography of potential fields is considered in this paper. Calculations is carried out by downward continuation of potential fields. A serious drawback of tomography is oblique (at 45°) interference from intensive field anomalies on computed spatial distribution of effective magnetization or density. It is necessary to continue down components extracted from the field with iterative or median bandpass filter in this work. These interferences will suppressed and shown in model and practical example.
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Use of Texas Two Step Fracturing to Enhance Oil Recovery at The Chutyrsko-Kiengopskoye Gas and Oil Field, Udmurtia
Authors O.V Likhacheva, G.Yu Kashin and A.V DubovtsevSummaryThis article deals with the possibility of using the Texas Two Step (TTS) technology in order to increase oil production at fields of the Udmurt Republic. The most appropriate oil field to use this technology is one of the largest oil fields of the region, namely Chutyrsko-Kiengopskoye gas and oil field. The article examines the advantages and economic indicators of the TTS technology proposed to be applied in the Chutyrsko-Kiengopskoye field.
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Problems of Repair & Insulation Work Efficiency and Key Factors of Water Coproduction at Oil Fields of The Udmurt Republic
Authors A.V Dubovtsev, G.Yu Kashin and O.V LikhachevaSummaryOne of the main problems for oil & gas industry in the Udmurt Republic is a high content of water producing along with oil, caused by involving many fields of the region into the final stage of development. Effective performance of repair & insulation works, also known as remedial well servicing, allows slowing down the tendency of increasing the excess water coproduction from producing wells. However, when designing repair & insulation work technology, the correct determination of the water cut source based on the research results plays a key role. This article considers the chief causes for the early water cut increase in wells and forms their classification. Taking oil fields located in the Udmurt Republic as examples, the main ways of water inflow to the bottom of production wells are examined. Comprehensive analysis shows the efficiency of repair & insulation works at the fields in question.
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Review of First Breaks Automatic Picking Algorithms Through Several Advanced Modern Software
Authors T.R Shamsutdinov, R.F Kadikov, A.Z Nedostupov and T.R SharafutdinovSummaryNowadays, the question of a quick solution for the a priori statics calculation issue remains acute. In this regard, the search for a solution to reduce the first breaks picking time is a crucial task. The perfect option for processing is a fully automatic picking procedure with virtually zero involvement of the processing operator. Thus, the task of this report is to determine the optimal tool for automatically first breaks picking. As a result of testing several modern software algorithms, the Flatirons Refraction Statics software package (Threshold Auto Picker, mostly the Delay Time Stack Prediction) and the NN_TRAINING and NN_FIRST_BREAK_PICK neural network modules in the Omega Schlumberger 2019.1 software package have chosen as the preferred options for automatic first breaks picking. They are also can be used together in different combinations.
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Geochemical Studies in The Process of Exploration and Production Drilling with The Use of Oil-Based Mud (OBM)
Authors A.V Ermolovsky, A.Y Kuklinsky, M.A Nevestenko, Y.S Tarasova, M.A Yakhina and E.V ZubarevaSummaryThe use of oil-based mud (OBM) in exploration and production drilling has a number of significant advantages. High stability of characteristics over a wide range of temperatures and pressures allows drilling in complicated mining and geological conditions. However, the high affinity of OBM with reservoir hydrocarbons interferes with laboratory studies of core material and fluid samples. Incorrect interpretation of research results leads to incorrect determination of oil saturation intervals, type of fluid, organic matter transformation degree, etc. The report presents some possibilities of geochemical methods for minimizing the influence of technogenic OBM components on the analysis results.
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Determination of Unfrozen Water Content in Frozen Soils by The Acoustic Method
Authors I.A Agapkin, P.I Kotov and R.G Kal’bergenovSummaryFrozen soils are a multi-component system consisting of unfrozen water, ice, gas and solid particles. The unfrozen water content in frozen soils is a key factor that determines their physicochemical and mechanical properties. Currently, several laboratory methods have been developed for determining unfrozen water content in frozen soils: contact, sublimation, calorimetric, nuclear magnetic resonance etc.. All methods take a long experiment time. Researchers have proposed various calculation methods.The research presents experimental studies of assessing unfrozen wanter content by equation with the velocity of longitudinal waves, the contact method and calculation by the formula (State Standart 25.13330.2012). An analysis results shows that most of the currently existing methods for determining unfrozen water are very laborious.The studies have shown that it is possible to use the acoustic method to predict the unfrozen water content (with some errors). But further research and approbation of this method is needed for various types of soils, water content and salinity.
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Prediction of The Structural Basement Surface Using Machine Learning Algorithms Applied in Potential Geophysical Fields
More LessSummaryThe work presents an alternative methods to predict the surface basement that provide a detailed overview of prediction using the algorithms “Random Forest (RF)”, “Gaussian process regression (GPR)” and “Regression tree (RT)” based on regression problems applicated on potential fields. To assess the error of these methods when determining the depths of the basement, part of the data in the training grid of different sizes and areas were excluded.
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Study on The Effect of Nonlinear Dynamic Loads on The Elastic Modulus of Rocks During Hydrocarbon Fields Development
Authors M.A Guzev, E.P Riabokon, M.S Turbakov, E.V Kozhevnikov and V.V PoplyginSummaryDuring the development of hydrocarbon fields geomechanical characteristics of rocks change under the effect of nonlinear dynamic loads. Elasticity modulus is one of the most important characteristics of mechanical properties of rocks used in engineering. It is known that the elasticity modulus of dry rocks does not depend on the frequency of the applied load. However, dispersion of elastic moduli in dry sedimentary rocks still exists. The mechanism, in accordance with which dispersion of the dynamic component of elastic modulus occurs, remains not fully disclosed. Studies on the dispersion of the dynamic component of the elasticity modulus under the influence of uniaxial dynamic loads are conducted on dry sandstone samples in the zone of linear elasticity. Physically substantiated relations are proposed. The nonlinear nature of the dynamic elasticity modulus under the influence of dynamic loads of given frequency and amplitude was confirmed. The obtained relations allow taking into account the influence of nonlinear dynamic loads on the elasticity modulus of the rock in the calculations when designing the development of hydrocarbon fields.
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Identification of Generation-Accumulation Hydrocarbon Systems of The Eastern Ciscaucasia Using Basin Modeling
Authors S.A Guryanov, S.G Serov and R.N MustaevSummaryThis article considers the issue of identifying the generation-accumulation hydrocarbon systems of the Eastern Ciscaucasia. Taking into account the available and pre-processed geological and geophysical material, two-dimensional basin modeling was carried out in the PetroMod software package (Schlumberger). The target object of modeling are the Oligocene sediments in the volume of the Khadum and Batalpashin formations.
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Structural-Tectonic Modeling of The Anadyr Basin of The Bering Sea
Authors S.A Guryanov, R.N Mustaev and V.Y KerimovSummaryTo characterize the oil and gas generation potential of the study area, it is necessary to have an idea of its structural and tectonic structure. For this purpose, in this work, structural-tectonic modeling of the Anadyr basin of the Bering Sea was carried out.
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Problems of Positioning Hard-To-Recover Reserves of Udmurtia’s Hydrocarbon Fields
Authors I.S Batinov, V.G Mironychev and G.Yu KashinSummaryProven reserves of «traditional» oil are on a declining trend. Therefore, it is necessary for producing companies to consider hard-to-recover reserves as a resource base in the future. Currently, the term «hard-to-recover reserves» is not defined enough. Some categories of the hard-to-recover reserves may be deleted from this list due to the development of technology, making the production of hydrocarbons much easier. However, an exploration of subsurface using modern technology makes it possible to produce these hydrocarbon reserves. That was impossible previously. The examples are the production of Permian petroleum bitumen and the development of domanic formations.
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Geochemical, Lithological and Geophysical Characteristics of Carbonaceous Carbonate-Clay-Siliceous Rocks of The Bazhenov Formation in The Eastern Part of The West Siberian Sedimentary Basin
Authors S.V Rizhkova, A.G Zamirailova, E.A Kostyreva, I.S Sotnich and V.G EderSummaryIn the east part of the West Siberian sedimentary basin the Bazhenov Formation has the Tarkosale, Vakh, and Nyurolka types of section. We have studied the lithology and geophysical characteristics of its rocks and the geochemistry of its organic matter and described the obtained characteristics of the sections. The greatest attention is paid to the geochemistry of organic matter. The results of the investigation indicate that the aquatic organic matter of the studied section types of the Bazhenov Formation was concluded to differ in content and composition of bitumoids primarily due its different maturity degree. The electrical resistivity and gamma activity of the studied section changes with proportion ratio of clay and carbonate components in the composition of their rocks. That can be preliminary explained by the position of the sections relative to the paleodepth and regional provenance.
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Lithological Models of The Bazhenov Formation in The North of The Khantheyskaya Hemianteclise Based on The Data of a Comprehensive Analysis of Geophysical Studies of Wells and Core Material
Authors M.A Fomin, A.E Kontorovich, S.V Ryzhkova, R.M Saitov and V.G EderSummaryAn important feature of the Bazhenov Formation is the heterogeneity of its lithological composition along the section. This article presents the results for one of the wells from the Druzhnaya area, located on the northern slope of the Khantheyskaya hemianteclise in the central part of the Khanty-Mansi Autonomous Okrug. For each lithological type of rocks, core-GIS dependencies were found that best describe its distribution over the section. The organic matter content correlates best with the radioactive log values. The concentrations of siliceous material and pyrite have a pronounced relationship with the electrical resistivity of rocks. The concentration of carbonate material correlates with the values of neutron logs, and the content of clay matter - with the density of the rocks and their electrical resistivity. After that, the multidimensional dependences of the content of each component on several types of logging were analyzed, which served as the basis for calculating the curves of their content in the rock. The calculated curves correlate well with the core data, which is confirmed by the high values of the reliable approximation (R2), which varies from 0.72 to 0.89 for different components. The resulting volumetric model clearly shows the relative content of the main rock-forming components in the Bazhenov Formation and their distribution over the section. The obtained dependences can be used to calculate the lithological composition of the Bazhenov formation in closely spaced wells that are not characterized by core material.
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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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Complex of Technology for Processing Heavier Cut of Pyrolysis Gas Oil
Authors D.V Stalmakh, Y.A Bulauka, S.F Yakubouski and E.A ShulhaSummaryIn order to improve the profitability of pyrolysis plants organized complex of technology for processing heavier cut of pyrolysis gas oil (PGO) of hydrocarbon raw materials. A complex includes the process of distillation for PGO into strait fractions; fraction boiling up to 230° could be used to produce plasticizer for concrete mixture obtained by condensation of naphthalene sulfonic acids from PGO and formaldehyde. Optimal parameters for the synthesis of plasticizer from PGO have been developed; the best mobility of concrete mixture is obtained from synthesis of plasticizer by the involvement of C10+ alkylbenzenes with a volumetric ratio of components for sulfonation: PGO:C10+ alkylbenzenes: H2SO4, respectively 10:5:12 respectively. To prevent intensive polymerization during the synthesis of the plasticizer, recommended to heat up slowly to the temperature of reaction and with a deviation, not more than 5°. Residual fractions of PGO of hydrocarbon raw materials (boiling above 230°) are characterized by a set of sufficient properties for their use as raw materials for coking. An atomic force microscope analysis of the microstructure of petroleum coke from the residual fraction of PGO established the possibility of elongated anisotropic inclusions specified for petroleum needle coke.
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Comprehensive Study of The Physicochemical Properties of Oil Using Dielectric Spectroscopy and NMR Relaxometry
Authors A.A Mezin, M.Y Shumskayte, O.V Rodionova and E.S ChernovaSummaryA joint interpretation of the data of dielectric spectroscopy and NMR-relaxometry methods for studying the physical and chemical properties of oil is presented. The influence of the components of the group composition of oil on the values of dielectric and NMR characteristics is shown. The results of the study show that a comprehensive study of the physicochemical properties of oil by these methods makes it possible to increase the accuracy of determining the pore space of rocks and the rheological properties of reservoir fluids.
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Methodology for Assessing Environmental Risks in The Design of Hydrocarbon Deposits in The Arctic Region
Authors P.M Savelev, V.V Rukavitsyn, A.K Akhmadiev and V.N ExarianSummaryTo properly assess environmental safety, it is crucial to identify environmental pollution risks resulting from a certain type of business activity. A special place among such activities is occupied by the organization of hydrocarbon production in the Arctic region, due to the extreme vulnerability of this area to anthropogenic impacts, which can lead to irreversible consequences for the environment. To solve this problem, the authors are developing a universal methodology that allows to assess environmental risks in the design of oil fields in the region, as well as to respond in a timely manner to dangerous anthropogenic impacts. In the present work, the first results related to the development of risk assessment criteria, their weight, as well as the structure and sequence of assessment are presented.
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Improvement of Quality and Performance Efficiency of High Capacity Vibroseis Works Based on Method of Multi-Zone Adaptive Processing of Vibrograms (MAPV)
Authors Yu.N Dolgikh, D.V Gulyaev, V.I Kuznetsov, S.S Sanin, V.V Sokolovskiy and E.P KaygorodovSummaryThe high-performance vibration seismic technologies increase the technological noise level (equipment movements, overlapping impacts influence), which negatively affects the quality of the initial data and requires an increased (2-4 times much) frequency in comparison to traditional work.
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Prevention of Hysteresis Phenomena During Filtration of Carbonated Oil in Reservoirs with Irreversible Deformation of Rocks in Overlying Fields
Authors E.V Makhetskaya, A.Kh Shakhverdiev and A.V DenisovSummaryIn the area of carbonated liquid movement, the indicator line enhances its curvilinear character, which occurs due to the influence of the two-phase flow, with the assumption of a significant decrease in the oil saturation pressure with gas. To correctly interpret the data from the wells survey at steady-state modes of their operation, it is necessary to know the “history” and the nature of the pressure change around the investigated well; in the course of hydrodynamic studies, it is necessary to determine the parameters of both the forward stroke curve, with a decrease in bottomhole pressure, and reverse stroke, with an increase in bottomhole pressure. It is recommended to set the operation mode of wells in a reservoir in such a way as to prevent a significant irreversible change in permeability around a working well. Therefore, reservoir pressure should be maintained at the appropriate optimal level by various methods of stimulating the reservoir, as shown in Figure 2. Almost any reservoir rocks during the development of deep oil and gas fields, as well as sands containing a significant amount of clay cement during the development of fields located at almost any depth, have plastic deformation. The obtained universal dependences are in good agreement and are explained by laboratory experiments. The obtained dependencies can be used in the interpretation of the results of the study of wells and formations and in determining the development indicators of fields with elastoplastically deformable reservoirs, as well as in the preparation of design documents and solutions of engineering problems.
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Features of Microleveling in The Processing of Geophysical Data Obtained on a Moving Base
Authors D.A Meleshkina and D.O PogosyanSummaryThis study describes microleveling methods and software for their application. Various microleveling methods are used for removing linear noise of magnetic data arising from the geophysical observations, in particular, in the aerial version with drones. Each method is characterized by its own algorithm, certain filter parameters, depending on the characteristics of the survey, advantages and disadvantages. The implementation of microlevelling techniques is possible with the help of specialized modules in modern software products. A general overview of the algorithms and an example of algorithm work on the results of magnetic field observations are presented.
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Experience in Studying of Reservoir Rocks Properties Evaluation and Saturation Containing High-Viscosity Oil Using the NMR Method
Authors M.I Zagidullin, A.G Potapov, E.N Salomatin and Y.I GilmanovSummaryOne of the most informative well logging methods, the use of which allows increasing the reliability of high viscosity oil fields rocks properties evaluation, is the NMR Logging. It is necessary to conduct rock core petrophysical investigations using NMR-method that allows determining total porosity in saturating samples by different fluids. It is necessary to introduce an amendment on the Hydrogen Index of fluids present in the samples for the correct assessment of total porosity value by the NMR-method. The oil present in the Ufimskiy layer possesses high viscosity; therefore, its recovery from the core is a challenging task. Three different oil recovery methods and NMR-characteristics of obtained oil samples are presented in the paper. It is possible to evaluate the portion of residual water saturation and, therefore, the effective pore space during the interpretation of NMR logging using the technology of cut-offs. It is demonstrated in the paper that the application of a standard cut-off of 33 ms and standard way of obtaining the cut-off that separates the residual water for rocks containing high-viscosity oil results in excessive values of residual water.
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New Optimization Criteria of Waterflood Patterns Preventing Premature Water Breakthrough in The Context of Water-Oil Displacement Front Instability
Authors A.Kh Shakhverdiev, A.V Denisov and V.D TumanovaSummaryIn the context of high water cut of most oil fields in Russia, problem of oil recovery enhancement using modern non-stationary hydrodynamic methods of oil reservoir stimulation combined with effective tertiary oil recovery methods becomes relevant. Using Buckley-Leverett mathematical model of two-phase displacement in hydrodynamic modelling of water-flood operations leads to water saturation discontinuity in the instability zone of water-oil displacement front. Existing methods of relative permeability curves approximation for elimination of water saturation «jump» on the distribution curve Sw(x,t) do not characterize an adequate physical mechanism of the instability of water-oil displacement front, which formed in terms of hydrodynamic, capillary, molecular, inertial and gravity forces interaction. Those forces cause premature water breakthrough and thus decrease of oil recovery efficiency. This paper proposes a new approach to system optimization of nonstationary water flooding, which is to select the control strategy of production and injection wells operation conditions as well as effective geo-technical measures (including appropriate EOR and production stimulation methods). The choice is based on qualitative dynamic analysis of current and cumulative oil/water production from each well using the mathematical apparatus of quadratic polynomial dynamic systems.
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Testing Results of The Abnormally High Reservoir Pressure (AHRP ) Estimation Technologies Based on Integrated Analysis of Geological, Geophysical and Field Data
Authors S.S Sanin, K.Yu Babinov, V.I Kuznetsov, Yu.N Dolgikh, G.M Mitrofanov, E.A Kurin and M.S DenisovSummaryAt the current geological time, the strata of sedimentary rocks where the abnormal pressure zones occur are in the stage of active geodynamic development. The sedimentation dynamics and the tectonic activity results affect the nature of the process development. To get an idea of the actual pressure distribution can be obtained by direct measurements in the permeable formations (formation pressure). However, pressure in the low permeability intervals (pore pressure) cannot be measured directly, but only calculated together with the direct indicators. Forecast of the rocks stress properties according to seismic survey data has its own peculiarities and is based on comparison of the measured interval velocities normalized to clay cross-section conditions with interval velocities of longitudinal waves in the clays normally compacted with depth. In addition, there are a number of new scientific methods for data processing with the aim of AHRP predicting based on the delicate effects, such as dissipation, amplitude, etc. In order to test the prediction to ensure the safe drilling we performed the research works to study the possibility of detecting and evaluating the AHRP areas based on the integration of ground seismic data of FWI processing and the acoustic logging logs, as well as on the attenuation coefficient estimation technology. The report demonstrates some of the AHRP prediction testing results based on the integral analysis of geological, geophysical and field data.
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Simulation of Electromagnetic Fields in Layered Media Based on Semi-Analytical Integral Transformations
Authors M.N Yudin, N.A Sevostyanov and D.D TsarevaSummaryCalculation of electromagnetic fields in layered models of the medium leads to the need to calculate the direct and inverse Fourier-Bessel (Hankel) transformations. The calculation of such improper integrals is complicated by the oscillating nature of the integrand. As a rule, it is the product of a smooth function of bounded variation by a Bessel function of the first kind. This circumstance allows the first function to be approximated in such a way that the integral of its product by the Bessel function is calculated analytically. We have analyzed two calculation algorithms. One of them is based on the expansion in terms of eigenfunctions of the Hankel integral operator, the second is based on approximation by a linear combination of exponentials. Both approaches make it possible to present the results of calculating integrals in an analytical form that allows their further mathematical analysis.
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