Geology, Geophysics and Development of Oil and Gas Fields

The paper considers the problems of geological modeling and determination of fluid contacts positions in lithologically inhomogeneous accumulations of oil and gas on the example of continental (fluvial macro-facies) and transitional (tidal plains) groups of facies. To justify a sharp change of saturation nature and fluid contacts position at the initial stage of production drilling, in case of absence of the factors of hydrodynamic non-connectivity of sand bodies, it is recommended to use a conditional separation line that runs either half the distance between wells with contradictory fluid types or in the zone of poor reservoir properties in the inter-well space.

Keywords: deposits geometrization; a conditional separation line; geological modeling; lithologically heterogeneous section; hydrocarbon reserves estimation; drilling support.

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UDC 622.276.1/.4(571.56) DOI: 10.30713/2413-5011-2019-8(332)-11-13

NEW OPPORTUNITIES FOR THE DEVELOPMENT OF THE PERMIAN-TRIASSIC VOLCANOGENIC
AND VOLCANO-TERRIGENOUS RESERVOIRS OF THE SAKHA REPUBLIC (YAKUTIA) (p.11)

Margarita Pavlovna Yurova

Oil and Gas Research Institute Russian Academy of Sciences (OGRI RAS)

3, Gubkin str., Moscow, 119333, Russian Federation,

e-mail: mpyurova@mail.ru

The paper aims to remind once again of the specificity of volcanogenic reservoirs, methods of exploration as well as the peculiarities of their development and exploitation with account of the already discovered and partially exploited gas fields of the Khapchagai megaswell of Vilyuisky syneclise due to the presence of similar rocks in the northern regions of Yakutia.

Keywords: gas fields; volcanogenic reservoirs; Vilyuyskaya syneclise.

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UDC 551.21 DOI: 10.30713/2413-5011-2019-8(332)-14-19

MUD VOLCANISM AND HYDROCARBONS MIGRATION (p. 14)

Namaz Puti Yusubov,

Gyulnara Marifat Alizade,

Bakhtiyar Javakhir Rajabli

Institute of Oil and Gas, Azerbaijan National Academy of Sciences

9, F. Amirov str., Baku, AZ1000, Republic of Azerbaijan,

e-mail: nyusubov@gmail.com

The formation of any type of oil and gas fields requires the following: presence in the Earth's crust conditions for the initial formation of hydrocarbons (oil-source rocks); presence of porous (permeable) rocks (reservoirs); channels for the migration of hydrocarbons to the upper layers; seal beds consisting of impermeable rocks that limit movement of oil and gas in vertical direction (screens or seals). Among these conditions, a special place takes the process of hydrocarbons migration, which occurs from high pressures areas to relatively low ones: their migration is possible upward, downward and to the sides depending on the specific conditions. The hydrocarbons migration from their formation centers to the upper layers of the geological environment occurs along the vertical (sub-vertical) channels connecting the source area of hydrocarbon formation with permeable rocks. The fluid, caught in the permeable areas of the geological section, also migrates along the area, along the impermeable formation – a deposit is formed. The paper considers the problem of the formation of vertical migration channels due to the stresses created inside the hydrocarbons’ generation zone.

Keywords: mud volcanism; fault; diapir; oil-source formation; hydrocarbons migration; sedimentation basin; non-Newtonian fluid; deposit; hydrocarbon; trap; organic matter; oil and gas content; Paleogene-Miocene; Maikop.

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UDC 550.834:[05+017+052] DOI: 10.30713/2413-5011-2019-8(332)-20-30

BUILDING OF 2D LITHOFACIES MODELS OF PRODUCTIVE RESERVOIRS AS THE BASIS
FOR COLLECTORS’ PREDICTION BY 3D CDP SEISMIC SURVEY DATA (p. 20)

Olga Vladimirovna Elisheva, Cand. of geol.-mineral. sci.

Tyumen Petroleum Research Center

42, Maxim Gorky str., 630025, Tyumen, Russian Federation,

e-mail: ovelisheva@tnnc.rosneft.ru

A correctly built facies model and effective thicknesses distribution adequate to it in compliance with the seismic data is the key for successful E&A drilling. A case study of Tyumen suite U3 formation in the southern regions of the Central Uvat describes a methodical approach to building of a facies model of continental genesis reservoirs based on the integration of occasional drilling data and the dynamic interpretations of 3D CDP seismic data. The paper shows that net pay development is laterally controlled by a certain type of the section containing genetically different “sand” facies, a vertical combination of which corresponds to certain total net pays.

Keywords: lithofacies analysis; Tyumen suite; channel facies; typical continental sections; net reservoir prediction; seismic and facies analysis.

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УДК 553.98:551.247(575.1, 575.4) DOI: 10.30713/2413-5011-2019-8(332)-31-40

MARINE SALT ACCUMULATION AND HYDROCARBONS GENESIS
(ON THE EXAMPLE OF THE AMUDARYA SEDIMENTARY BASIN) (p. 31)

Askhat Khabibullovich Nugmanov, Dr. of geol.-mineral. sci.

Institute of Geology and Exploration of Oil and Gas Fields (IGIRNIGM)

114, Shota Rustaveli str., Tashkent, 100059, Republic of Uzbekistan,

e-mail: nugmanov_a_x@ rambler.ru

According to the new pattern of salt accumulation, the sea should have a bath-like cross-section of the bottom, extensive shallow water, a constant unlimited inflow of ocean water and a relatively shallow underwater protrusion serving as the boundary between the epicontinental sea and the ocean. In the shallow waters of the sea at the preparatory stage of halogenesis under conditions of arid climate gypsum crystallized, which was accompanied by the formation of highly mineralized residual solution, which flowed into deep areas of the sea, creating supra-bottom brine – the source of the stratified sulfate and chloride salts. The brine at the preparatory stage of halogenesis filled the seabed to the underwater elevation between the sea and the ocean.

Above the above-bottom brine there was the sea, in which during the preparatory stage there existed marine organisms, the remnants of which served as a source of organic matter and hydrocarbons in subsalt sediments characterized by a dramatically remedial situation.

Keywords: marine halogenesis; gypsum; halite; potassium salts; epicontinental sea; preparatory stage; coastal shallow water; layers of bottom brine; paragenesis of salt accumulation and oil and gas formation.

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UDC 550.4:552.578:553.983+551.76 DOI: 10.30713/2413-5011-2019-8(332)-41-55

CHARACTERISTICS OF THE SEISMIC-GEOLOGICAL MODEL OF THE PALEOZOIC-MESOZOIC COMPLEXES OF THE WESTERN PART OF THE RUSSIAN SECTOR OF THE BARENTS SEA SHELF ACCORDING TO 3D SEISMIC DATA (p. 41)

Oleg Arkadievich Smirnov¹, Cand. of geol.-mineral. sci.,

Vladimir Nikolaevich Borodkin^2,3, Dr. of geol.-mineral. sci.,

Andrey Viktorovich Lukashov¹,

Arkady Romanovich Kurchikov², Dr. of geol.-mineral. sci.,

Venera Ildarovna Samitova²,

Ekaterina Veniaminovna Sharifyanova¹,

Alexander Vladimirovich Pogretsky⁴

¹LLC "Ingeoservice"

²A. 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

³Tyumen Industrial University (TIU)

38, Volodarsky str., Tyumen, 625000, Russian Federation

⁴LLC "Gazprom geologorazvedka"

The paper presents the characteristics of the geological structure of the coal Lower Permian, Upper Permian-Triassic, Lower-Middle Jurassic (Aalen-Bayos), Middle Jurassic (Bat Callovian), Upper Jurassic, Neocomian and Aptian-Albian Cenomanian complexes. A brief description of the model of their sedimentation and the established identified petroleum potential is given.

Based on the comprehensive analysis of the seismic data, with account of some specific features of the complexes, promising areas were identified.

Due to the greater disturbance of the explored territory by disjunctive tectonics, it is concluded that it can possibly have a negative effect on the oil and gas potential of the lower-lying complexes (destruction of hydrocarbon deposits). On the other hand, due to the observed processes of hydrocarbons vertical migration because of tectonic disturbances, the formation of secondary hydrocarbon deposits in the overlying sediments is possible.

Keywords: water area of the Barents Sea; sedimentary complex; seismic section; reflecting horizon; seismic attributes; disjunctive tectonics; HC migration.

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UDC 551.7.022 DOI: 10.30713/2413-5011-2019-8(332)-56-61

MOLDING AND FACIAL CHARACTERISTICS OF THE LAYER J₁³ IN THE SOUTH PERIKLINALI OF THE KAYMYSOVSKY ARCH BASED ON COMPLEXING OF 3D SEISMIC SURVEY AND DRILLING (p. 56)

Alexander Viktorovich Bobrov

Joint Stock Company "Tomsk Petroleum Institute"

72, Mira prosp., Tomsk, 634027, Russian Federation,

e-mail: BobrovAV@tomsknipi.ru

Vladimir Borisovich Belozerov, Dr. of geol.-mineral. sci.

Tomsk Polytechnic University

30, Lenina prosp., 634050, Tomsk, Russian Federation,

e-mail: belozerov@tpu.ru

The article describes the Upper-Jurassic reservoir detection technique basing on lithological and sedimentological core analysis, well logging and 3D seismic data interpretation. J₁³ formation has poly-facies origin with deltaic sediments distribution. The invented methodology should be implemented on nearby areas for optimal exploration wells placement and structural-lithological traps detection.

Keywords: Vasjugan suite; core; seismic data; seismofacies analysis; seismic attributes; lithological trap.

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UDC 553.9 DOI: 10.30713/2413-5011-2019-8(332)-62-74

GEOCHEMICAL CRITERIA OF PETROLEUM POTENTIAL OF THE RIPHEAN-PALEOZOIC SEDIMENTS OF THE LENA-ANABARSKY REGIONAL TROUGH AND ADJACENT TERRITORIES (p. 62)

Peter Nikolaevich Sobolev, Cand. of geol.-mineral. sci.,

Danil Sergeevich Lezhnin,

JSC "Siberian Research Institute of Geology, Geophysics and Mineral Resources"

67, Krasny prosp., Novosibirsk, 630091, Russian Federation

Ivan Alexandrovich Panarin,

Ekaterina Nikolaevna Gavrilova,

Anna Mikhailovna Pimenova

LLC "LUKOIL−Engineering"

3, bld.1, Pokrovsky boulevard, Moscow, 109028, Russian Federation.

The paper presents the geochemical characteristics of the organic matter (OM) of the main promising oil- and gas-bearing complexes, their generation-accumulation potential is determined. Based on the schematic maps of geochemical parameters and geological-geophysical data, a predictive map of the petroleum potential of the Riphean-Paleozoic sediments of the Lena-Anabarsky regional trough and adjacent territories was compiled.

Keywords: geochemical characteristics; organic matter; oil and gas potential complexes; generation-accumulation potential; the Riphean-Paleozoic sediments; Lena-Anabarsky regional trough.

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UDC 552.578 DOI: 10.30713/2413-5011-2019-8(332)-75-80

TRACE ELEMENTS COMPOSITION OF THE ROMASHKINSKAYA GROUP OF OILFIELDS (p. 75)

Svetlana Alexandrovna Punanova¹, Dr. of geol.-mineral. sci.,

Mikhail Vladimirovich Rodkin^1,2, Dr. of phys.-math. sci.

¹Oil and Gas Research Institute Russian Academy of Sciences (OGRI RAS)

3, Gubkin str., Moscow, 119333, Russian Federation,

e-mail: punanova@mail.ru, rodkin@mitp.ru

²Institute of Earthquake Prediction Theory and Mathematical Geophysics RAS

84/32, Profsoyuznaya str., Moscow, 117997, Russian Federation

The paper discusses some specific features of the trace elements (TE) composition of the oils of the Romashkinskaya group of fields in the Volga-Ural region. The results of the identified correlation dependencies between the TE compositions of oils, biota, lower, middle and upper crust made it possible to preliminarily assess the contributions of these geochemical media in the TE composition of oils, to reveal the effects of exogenous and endogenous factors on the process of oil formation of this unique field and support the supposition of its modern refeeding.

Keywords: hydrocarbons; biota; upper, middle and lower crust; trace elements; correlation coefficients; contribution; Romashkino field.

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UDC 622.276.43:661.97 DOI: 10.30713/2413-5011-2019-8(332)-81-86

OPTIMIZATION OF THE TECHNOLOGICAL EFFICIENCY OF CO₂ INJECTION IN EXTRA-VISCOUS OIL DEPOSITS USING LABORATORY STUDIES AND NUMERICAL MODELING (p. 81)

Artem Vladimirovich Nekrasov,

Kirill Igorevich Maksakov,

Gennady Aleksandrovich Usachev

LLC "LUKOIL−Engineering"

3, bld.1, Pokrovsky boulevard, Moscow, 109028, Russian Federation,

e-mail: Artem.Nekrasov@lukoil.com, Kirill.Maksakov@lukoil.com

Valery Borisovich Karpov, Cand. of tech. sci.

LLC "RITEK"

3, Bolshaya Ordynka str., Moscow, 115035, Russian Federation

Alexey Nikolaevich Cheremisin, Cand. of tech. sci.

Skolkovo Institute of Science and Technologies

Active involvement of fields with highly viscous oils in the development is currently an urgent problem. One of the ways to enhance oil recovery from such fields is the injection of carbon dioxide. The paper describes the results of special laboratory studies and modeling of CO₂ injection using the Huff-n-Puff method in the studied objects. When conducting a special PVT analysis, the concentration of CO₂ in the oil that provides division into two phases was determined.

Minimum mixing pressure (MMP) was determined by three methods, of which only the Huff-n-Puff method was effective. The core samples permeability after CO₂ injection became worth. When simulating CO₂ injection at two objects, the results that correspond to the international experience were obtained.

Keywords: high-viscous oils; carbon dioxide injection technology; two-phase system; experiment on slim tube; Rapid Pressure Increase method; immiscible extrusion mode; minimum mixing pressure; Huff-n-Puff test.

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UDC 622.276/692.12 DOI: 10.30713/2413-5011-2019-8(332)-87-90

ABOUT THE REQUIREMENT OF THE THERMAL WATERS USE TO ENHANCE OIL RECOVERY (p. 87)

F.T. Murvatov

Oil-Gas-Extracting Management "Siyazane-oil"

37, H. Aliev str., Siyazene city, AZ5300, Republic of Azerbaijan,

e-mail: fmurvetov@mail.ru

M.M. Ismailova

Azerbaijan State Oil and Industry University

20, Azadlig pr., AZ1010, Baku, Republic of Azerbaijan,

e-mail: mehribani@inbox.ru

The paper substantiates the possibility of thermal waters use to enhance oil recovery. Thermal methods of enhancement of oil recovery (EOR) are the methods of oil inflow intensification and wells production increase, based on artificial increase of temperature in their wellbore and well bottom zone. The thermal EOR are particularly applied when extracting high-viscous, paraffinic and resin oils.

Keywords: hard-to-recover oil; paraffin-resin-asphaltene; well bottom zone; thermal waters; permeability.

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