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ISSN
2413-5011 Scientific-technical journal AND DEVELOPMENT OF
OIL AND GAS FIELDS published since 1992 May 2019 ¹ 5(329) 12 issues per year
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OIL AND GAS PROSPECTING |
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GEOPHYSICAL RESEARCH WORK |
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DEVELOPMENT OF OIL AND GAS FIELDS |
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Information on the articles |
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UDC
553.98:550.834 DOI:
10.30713/2413-5011-2019-5(329)-4-12 IDENTIFICATION AND MAPPING OF FLUID-SATURATED
ANISOTROPIC CAVERN-CRACKED Alexander Sergeevich Smirnov, Cand. of
geol.-mineral. sci. LLC
"Gazprom geologorazvedka" 70, Hertsen
str., 625000, Tyumen, Russian Federation, e-mail:
a.smirnov@ggr.gazprom.ru Tyumen
Industrial University (TIU) 38, Volodarsky
str., Tyumen, 625000, Russian Federation; e-mail:
smirnovas@tyuiu.ru Andrey Gelievich Vakhromeev, Dr. of geol.-mineral. sci. Institute of
the Earth’s Crust SB RAS 128, Lermontov
str., Irkutsk, 664033, Russian Federation, Irkutsk
National Research Technical University 83, Lermontov
str., Irkutsk, 664074, Russian Federation, e-mail:
andrey_igp@mail.ru Arkady Romanovich Kurchikov, Dr. of geol.-mineral. sci. A. Trofimuk Institute
of Oil and Gas Geology and Geophysics, the West-Siberian branch of the
Russian Academy of Sciences 56, Volodarsky
str., Tyumen, 625000, Russian Federation, e-mail:
niigig@tmnsc.ru Ivan Vladimirovich Gorlov, Pavel Nikolaevich Kokarev, Vyacheslav Vasilievich Kasyanov, Alexandra Vasilievna Makarova LLC
"Gazprom geologorazvedka" 70, Hertsen
str., 625000, Tyumen, Russian Federation, e-mail:
i.gorlov@ggr.gazprom.ru, p.kokarev@ggr.gazprom.ru, v.kasyanov@ggr.gazprom.ru,
a.makarova@ggr.gazprom.ru The paper considers new ideas about the geological structure and confinement of the Kovyktinsky gas condensate field as an object located within the boundaries of the platform and the area of its conjunction with the marginal deflection according to the new and retrospective geological-geophysical data. The fluid-saturated inter-salt layers with different types of void space are investigated by the characteristics of the seismic wave field. A new idea of the Kovykinsky field geological structure together with the approach under consideration to natural reservoirs’ identification and mapping, provides considering it, apart from complication intervals prediction during drilling, as a purpose object of prospecting and revealing new deposits of hydrocarbons. Keywords: platform; marginal deflection; fracture; anisotropy; Kovyktinsky field; abnormally high reservoir pressure; natural reservoirs; fluids; CDP method; scattered waves. |
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UDC
553.98.041(470.56) DOI:
10.30713/2413-5011-2019-5(329)-13-21 OIL RESERVES DISTRIBUTION IN COMPLICATEDLY-BUILT
FRACTURED COLLECTORS Vladislav Alimovich Shakirov, Cand. of
geol.-mineral. sci., Alexander Petrovich Vilesov, Cand. of
geol.-mineral. sci. Ksenia Nikolaevna Chertina, Natalia Mikhailovna Istomina LLC
"Tyumen Petroleum Research Center" 42, Maxim Gorky
str., 625048, Tyumen, Russian Federation; Nikolay Nikolaevich Koryagin JSC
"Orenburgneft" 2, Magistralnaya
str., Buzuluk, 461040, Orenburg region, Russian Federation. The discovery and development of a number of oil deposits confined to the Late Frasnian single basin reefs in Orenburg region indicate the need for a deeper study of such objects. The reefs complicated structure, their facies heterogeneity, significant influence of epigenetic processes on the change and transformation of the primary void space, developed fracturing – all these factors increase the requirements to the methodology of reef reservoirs studying, the accuracy of geological models and the reliability of hydrocarbon reserves calculation. The paper, with account of the core’s sedimentological analysis and laboratory studies, evaluates the characteristics of the heterogeneous reef reservoir. The presented material is unique for Volga-Ural petroleum province, as only Volostnovskaya well No 50X was subjected to a continuous high-quality core selection along the whole oil-saturated interval, including the transition zone. High geological-field knowledge provides identification of the reservoir facial zones, evaluation of the peculiarities of the void space composition and calculation of hydrocarbon reserves with account of specific fractured reservoirs Accounting when evaluating the rocks intervals reserves with a dense matrix, permeated by a system of fractures connecting rare caverns and pores, allows to increase geological reserves from 50 to 100 %. Keywords: hydrocarbon reserves; reef reservoir; the Upper Devonian; Volga-Ural oil and gas province; core; reservoir rocks; secondary voids; fractures. |
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UDC
553.98(470.56)+550.8.072 DOI:
10.30713/2413-5011-2019-5(329)-22-31 NEW APPROACH TO EVALUATION OF FLUID SEALS
QUALITY IN A CARBONATE STRATA Natalia Nikolaevna Chikina, Ruslan Fuadovich Melikov, Nikolay Alexeevich Pavlyukov, Alexey Yurievich Kudymov, Evgeny Vladimirovich Astafiev, Valery Vladimirovich Sulakshin LLC
"Tyumen Petroleum Research Center" 42, Maxim Gorky
str., 625048, Tyumen, Russian Federation, e-mail: nnchikina@tnnc.rosneft.ru, rfmelikov@tnnc.rosneft.ru,
napavlyukov@tnnc.rosneft.ru, aykudymov@tnnc.rosneft.ru,
evastafyev@tnnc.rosneft.ru, VVSulakshin@tnnc.rosneft.ru Until recently, the discovery of new deposits in the carbonate strata of the Famennian age of Orenburg region was accidental. The poor logging quality prevented identification of promising intervals in the cross-section when drilling deep wells, and the Famennian carbonate strata itself was not the object of the exploration work. Lately, many deposits were identified after 3D seismic survey, re-interpretation of well logging and well tests data in previously drilled wells. The main uncertainty when choosing a new well location is the estimation of fluid seals quality. Core complex studies conducted by LLC "Tyumen Research Petroleum Center" in the interval of carbonate rocks-fluid seals of the Famennian age made it possible to provide rocks typing, develop quantitative and qualitative criteria for determining fluid seals integrity and to study regularities of their extension. Since the distribution of the analyzed Famennian stratum rocks are unevenly characterized by the core and logging data, then further development of exploration activities requires significant increase of improving the prediction accuracy of high-quality fluid seals due to the complex analysis of information and implementation of new approaches and techniques, including geo-mechanical modeling. Keywords: carbonate stratum; fluid seals; caprock integrity; elastic characteristics; geo-mechanical modeling; stresses barriers. |
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UDC
622.276.031:532.5.001 DOI:
10.30713/2413-5011-2019-5(329)-32-37 LINEAR LAW VIOLATION OF OIL FILTRATION IN THE BAZHENOV SUIT DEPOSITS (p. 32) Vladimir Tarasovich Litvin, Cand. of tech. sci., Pavel Valerievich Roschin, Cand. of
tech. sci. LLC
"Akribia Lab" 29,
Alma-Atinskaya str., Samara, 443051, Russian Federation; Valeria Alexandrovna
Olkhovskaya,
Cand. of tech. sci., Alexey Mikhailovich Zinovev, Cand. of
tech. sci. Samara State
Technical University 244,
Molodogvardeiskaya str., 443100, Samara, Russian Federation, e-mail: valeriaolh@mail.ru, lekso1988@yandex.ru Ivan Alexandrovich Struchkov, Cand. of
tech. sci. LLC "Tyumen
Petroleum Research Center" 79/1, Osipenko
str., Tyumen, 625000, Russian Federation. Filtration of light low-viscous oil with and without back-pressure at the end of the Bazhenov suit core sample is carried out. The comparative analysis of the rheological curves resulted in the identification of the linear connection violation between the liquid volumetric flow-rate and the pressure gradient, mainly caused by the change of permeability as a result of structural change of the void space. Keywords: the Bazhenov formation; light low-viscous oil; rheological curves; linear filtration law; productivity index. |
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UDC
553.982.052 DOI:
10.30713/2413-5011-2019-5(329)-38-41 MOLECULAR PHYSICS AS A WAY TO IMPROVE THE
EFFICIENCY OF EXPLORATION Yuly Yakovlevich Bolshakov, Evgenia Yulevna Neelova Tyumen
Industrial University 70, Melnikayte
str., Tyumen, 625000, Russian Federation, e-mail:
bolshakov30@yandex.ru The prospecting, exploration and development of oil and gas deposits is based on the anticlinal-gravitational concept of oil and gas accumulation. For 160 years, it has been the dominant working hypothesis when solving these problems. On its basis, the global oil and gas industry emerged and developed. However, the anticlinal-gravitational theory of oil and gas accumulation does not cover all possible forms of oil and gas existence in real conditions of the subsoil. It doesn’t cover and all the phenomena leading to the formation of hydrocarbon deposits. This fact is proved by many accidentally discovered oil and gas accumulations, the structure of which and structural confinement completely contradict the principles of the anticlinal concept. These deposits were formed as a result of the laws of molecular physics and above all capillarity. The study of the capillary properties of reservoir-rocks of both conventional and unconventional deposits will significantly improve the efficiency of exploration and production work on oil and gas. Keywords: oil; gas; water; capillarity; hydrophilic; hydrophobic; interfacial tension; prospecting; exploration; development; reservoir. |
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UDC
550.8.053 DOI:
10.30713/2413-5011-2019-5(329)-42-50 PRE-CASPIAN DEPRESSION – FRONTIER MEGASTRUCTURE
OF CONTINENTAL CRUST Vladimir Stepanovich Druzhinin, Cand. of
geol.-mineral. sci., Nikolay Ivanovich Nachapkin, Cand. of
phys.-math. sci., Vyacheslav Yuryevich Osipov, Cand. of
geol.-mineral. sci. Institute of
Geophysics Ural Branch of the Russian Academy of Sciences (IGF UB RAS) 100, Amundsen
str., 620016, Yekaterinburg, Russian Federation, e-mail: druvs@mail.ru,
nachapkin@mail.ru, usc_slava@mail.ru. The main attention is paid to results of quantitative calculations for submeridional geotraverse of DSS r. Manysh–Karachaganak, located in eastern part of Caspian depression, with creation of seismic-geo-density model of upper part lithosphere using the technology developed for Ural region. Convincing data were obtained indicating that largest sedimentary basin is timed to Pre-Caspian border megastructure of the lithosphere top, located between two ancient platforms of the continental crust: East European and prospective Iran-Arabian, covered with folded complexes of low basicity, corresponding to Mediterranean belt of Hercynides. The boundary megastructure in area of geotraverse consists of three parts: North, South and Central. Against the background of general anomalous structure of upper part lithosphere, the Central structure is distinguished by maximum anomaly. In general, the obtained quantitative information about deep structure of Pre-Caspian Basin is a good example of dynamic transformations of ancient continental crust due to the repeated activation of upper mantle. The necessity of carrying out such studies for the compilation of three-dimensional model, at least along eastern part of Pre-Caspian depression, the boundary megastructure of which may also be southern limitation of Ural fold system, is noted. The model is also needed to solve practical problems in search for large oil and gas fields in downstream sediments. Keywords: southeast and south margin of East-European platform; Pre-Caspian depression; southwest of Ural region; geotravers r. Manysh–Karachaganak; fault-block seismic-geo-density model; upper part lithosphere. |
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UDC
553.98(574) DOI:
10.30713/2413-5011-2019-5(329)-51-55 BASIC DIRECTIONS OF OIL AND GAS PROSPECTING
RESEARCH WITHIN THE FRAMEWORK Dulat Kalimovich Azhgaliev, Cand. of
geol.-mineral. sci. Non-commercial
JSC "Atyrau University of Oil and Gas" 45a, bld.2, Musa
Baimukhanov str., Atyrau, 060027, Republic of Kazakhstan, e-mail: dulat.azhgaliev@gmail.com The characteristic of the main results of the project "Comprehensive study of sedimentary basins of the Republic of Kazakhstan" for 2009–2013 in the cross-sections of the basins, located in the western part of the country (Caspian basin, Ustyurt-Bozashi, Mangyshlak) is presented. The results of the actual fulfilment and the main recommendations implementation received for this project at the present time are given. The transitional stage from solving the regional scale problems to the implementation of the problematic ones at a zonal-area and detailed level is stated. The
characteristic is given to some directions of the research that mainly
concern the geology and petroleum potential of the Paleozoic sequence, which
are the most relevant for the industry at present. These directions address
the problems of abnormally-deep wells drilling, zoning of the most favorable
conditions distribution for predicting large hydrocarbon deposits with the
emphasis on the acceptable ecological conditions of wells drilling, provision
of the regular, stage-by-stage nature of the objects study and preparation
for exploratory works and the problems solution. With account of the achieved results and new geological-geophysical data, some proposals are made to enhance the efficiency of all the activities in terms of further systematic implementation of the recommendations, previously adopted. Keywords: sedimentary basin; hydrocarbons; oil and gas prospects; the Pre-Caspian basin; Ustyurt-Bozashi; Mangyshlak; the Paleozoic complex; well; depth of occurrence; specific features of the geological structure. |
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UDC
550.832 DOI:
10.30713/2413-5011-2019-5(329)-56-60 NEW APPROACHES TO FILTRATION-CAPACITIVE
PROPERTIES PREDICTION BY THE DATA Nikolay Ivanovich Mastepanov, Dr. of economic sci., Alexander Sergeevich. Novikov, Cand. of
tech. sci. Vyacheslav Valentinovich
Spichak, Dr.
of fis.-mat. sci. LLC "MIP
"Geological Survey Plus" 3, Odoevsky
str., Moscow, 117574, Russian Federation, e-mail:
novikov.as@mail.ru Dmitry Yurievich Serikov, Dr. of tech. sci. National
University of Oil and Gas "Gubkin University" 65, Leninsky prosp., Moscow, 119991, Russian Federation. e-mail:
serrico@rambler.ru The paper considers new possibilities that are provided by conducting areal electromagnetic sounding to predict reservoir properties at the depths below the well as well as in the inter-well space. The example of the Peshelbron oil field (France) shows that electromagnetic sounding of a site allows spatial contouring of a hydrocarbon deposit and optimization of production wells location. Particularly, when choosing a drilling point in accordance with the method proposed by us, it could increase the oil saturation at the bottom of the well by several times as compared with the traditionally applied method based only on the seismic survey data. A new concept of rocks’ reservoir characteristics forecasting while drilling (Forecasting While Drilling – FWD), based on using the results of preliminary 3D electromagnetic prospecting and logging while drilling (LWD). The spatial forecast of reservoir properties and fluid saturation during drilling will improve the accuracy of the resource potential assessment, optimize the drilling strategy and reduce costs. Keywords: electromagnetic sounding; electrical resistivity; rock porosity; reservoir properties of rocks; fluid saturation. |
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UDC
622.276 DOI:
10.30713/2413-5011-2019-5(329)-61-65 DEPOSITS IDENTIFICATION PECULIARITIES IN THE
REGIONS’ VARIOUS Lyubov Sergeevna Kuleshova Ufa State
Petroleum Technological University, Branch of the University in the City of
Oktyabrsky 54a, Devonskaya
str., Oktyabrsky, 452607, Republic of Bashkortostan, Russian Federation, e-mail: markl212@mail.ru Vyacheslav Vyacheslavovich
Mukhametshin, Cand.
of tech. sci. Ufa State
Petroleum Technological University 1, Kosmonavtov
str., Ufa, 450062, Republic of Bashkortostan, Russian Federation, e-mail:
vv@of.ugntu.ru The paper analyzes the influence of various parameters characterizing the geological, physical and physicochemical properties of beds and fluids, saturating them, as well as the occurrence conditions on the degree of oil deposits identification in the Volga-Ural oil-and-gas province carbonate reservoirs and the West Siberian oil-and-gas province terrigenous reservoirs. The general laws and specific features of identifiability are established as well as a minimum set of parameters are established, that makes it possible, with a 70 % probability, to carry out the identifying procedure and objects grouping. Keywords: identification; oil and gas potential provinces; relevant parameters. |
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UDC
622.276 DOI:
10.30713/2413-5011-2019-5(329)-66-70 THE METHOD OF THE BROOKS – COREY MODEL
ADAPTATION TO THE CONDITIONS Rasul Tukhbatullovich Akhmetov, Cand. of tech. sci., Professor, Lyubov Sergeevna Kuleshova, Albina Rinatovna Safiullina Ufa State
Petroleum Technological University, Branch of the University in the City of
Oktyabrsky 54a, Devonskaya
str., Oktyabrsky, 452607, Republic of Bashkortostan, Russian Federation, e-mail: vsh@of.ugntu.ru, markl212@mail.ru, safiullina.a.r@yandex.ru Vyacheslav Vyacheslavovich
Mukhametshin,
Cand. of tech. sci., Ufa State
Petroleum Technological University 1, Kosmonavtov
str., Ufa, 450062, Republic of Bashkortostan, Russian Federation, e-mail: vv@of.ugntu.ru The paper discusses the issues of Brooks – Corey model parameters determination when approximating capillary curves in conditions of productive strata in the Western Siberia. It is shown that the considered approximation model describes the plateau-shaped section of capillary curves, the position of which is determined by the reservoir properties, and firstly, by absolute permeability. It is noted that under the conditions of the Western Siberia reservoirs, there observed close correlations between the capillary curves’ current water saturation in case of the fixed capillary pressure values and reservoir properties (absolute permeability, residual water saturation). The use of these correlations makes it possible to estimate, with good accuracy, such parameters of the approximation model as the initial capillary pressure and the capillary curve steepness. In the absence of the absolute permeability data, it is recommended to use the current water saturation correlations from the residual water saturation. It is known that the residual water saturation value in extremely oil-saturated reservoirs can be, with sufficient accuracy for practical purposes, estimated by the well logs data. Keywords: absolute permeability; residual water saturation; capillary curve; porosity. |
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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH
INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY" |