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Tyumen 2021
- Conference date: March 22-26, 2021
- Location: Tyumen, Russia
- Published: 22 March 2021
41 - 60 of 88 results
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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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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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