ISSN 2413-5011

Scientific-technical journal

GEOLOGY, GEOPHYSICS

AND DEVELOPMENT OF OIL AND GAS FIELDS

                                                                                                       published since 1992

July 2021                           ¹ 7(355)                       12 issues per year

 

CONTENÒS

 

OIL AND GAS PROSPECTING

 

Zhuravleva L.M., Kuznetsov V.G. Shielding character of hydrocarbon pools in reefs (p. 5‑12)

 

Zabanbark A. Prospects for oil and gas potential of the Campos basin in the South-East of Brazil (p. 13‑19)

 

Karimov K.M., Al Ali A., Vagapov T.A., Lonshakov M.A. Space remote sensing in infrared wavelength range when searching for hydrocarbon deposits in the Douala basin of the Republic of Cameroon (p. 20‑25)

 

GEOLOGICAL MODELING

 

Smirnov O.A., Borodkin V.N., Plavnik A.G., Lukashov A.V., Komgort M.V., Teplyakov A.A. Problems of the technique of three-dimensional sedimentation modeling (p. 26‑34)

 

Kornikov R.O., Miley M.S., Basanaeva N.A. Facial modeling of the Achimov clinoform deposits in a poorly differentiated wave pattern on the example of the Sorovskoye field in the Western Siberia (p. 35‑43)

 

DEVELOPMENT OF OIL AND GAS FIELDS

 

Agishev E.R., Andreev V.E., Mukhametshin V.V., Kuleshova L.S., Yakupov R.F. Assessment of the potential for oil reserves growth in thinly bedded reservoir (p. 44‑48)

 

Kuzmina V.V., Vilesov A.P. Facial heterogeneity of the Frasnian Kindelsky reef and its manifestation in the process of the oil deposit development (p. 49‑57)

 

Akhapkin M.Yu., Efimova N.P., Lomakina O.V., Solopov D.V. Research and analysis of preparation to regular development of a small complicatedlycomposed field with abnormally high reservoir pressure and temperature (p. 58‑70)

 

Akhmetov R.T., Malyarenko A.M., Kuleshova L.S., Mukhametshin V.V., Safiullina A.R. Absolute permeability and void space structure of reservoirs in the Western Siberia (p. 71‑77)

 

MEMORY DATES

 

In memory of A.G. Lachkov (p. 78‑78)

 

 

Information on the articles

 

UDC 551.35+550.8          DOI: 10.33285/2413-5011-2021-7(355)-5-12

 

SHIELDING CHARACTER OF HYDROCARBON POOLS IN REEFS (p. 5)

 

Liliya Maratovna Zhuravleva1, Cand. of geol.-mineral. sci.,

Vitaliy Germanovich Kuznetsov1,2, Dr. of geol.-mineral. sci., Professor

 

1National University of Oil and Gas "Gubkin University"

65, bld. 1, Leninskiy prosp., Moscow, 119991, Russian Federation,

e-mail: zhurawlewa.lilia@yandex.ru

 

2Oil and Gas Research Institute Russian Academy of Sciences (OGRI RAS)

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

e-mail: vgkuz@yandex.ru

 

The paper presents the results of a comparative analysis of shielding traps nature associated with reef massifs, on the one hand, and structural-tectonic ones, in which arch reservoirs are formed in clastic deposits and non-reef carbonate ones, on the other hand. The screening material composition is the same for any trap types – it is mainly clay and/or salt-bearing strata, which is determined by the climate of rock formation environments. Differences in seals of reef and non-reef reservoirs are determined by genetic factors and manifested in morphology. Screening strata of reef deposits are formed at regressive stages of sedimentation basin history; screening of structural traps occurs at transgressive stages. In case of non-reef traps, seals form primarily horizontal or slightly inclined layers, and the closed volume of traps is created as a result of subsequent tectonic movements, while in reef traps, screening deposits cover the entire surface of structures, and the height of the traps can be significant, that is, the closed volume is formed already at the sedimentation stage.

 

Keywords: reef; morphological-genetic types of reefs; screening strata; reef and non-reef reservoirs.

 

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UDC 553.98(81)          DOI: 10.33285/2413-5011-2021-7(355)-13-19

 

PROSPECTS FOR OIL AND GAS POTENTIAL OF THE CAMPOS BASIN
IN THE SOUTH-EAST OF BRAZIL (p. 13)

 

Àlie Zabanbark, Cand. of geol.-mineral. sci.

 

P.P. Shirshov Institute of Oceanology Russian Academy of Sciences

36, Nakhimovskiy prosp., Moscow, 117997, Russian Federation,

e-mail: azaban@ocean.ru

 

Analysis of more than 50 big hydrocarbon fields, mainly oily in the deep-water part of the Campos basin, revealed the tendency of these large fields lying in the productive belt of oil-pay, extending in the limit of sea depth from 400 till 2500 m (possibly 3000 m and more), in the system of external depressions, which are stretching along the lower part of the continental slope. This belt perhaps is spreading to the north. All the fields of this belt, judging by their reserves, are estimated as large and gigantic ones. The exploration works have already been conducted in this belt for the last 10...15 years in the subsalt formation: 21 fields were discovered in the Campos basin. It should be noted that 48 % of the total hydrocarbon production of the country is formed by the subsalt carbonate deposits of the Aptian age, located on the continental slope, 44 % of post-salt rocks are partially found on the continental slope and shelf and only 8 % of hydrocarbons produced on land. The deepwater sub-salt Aptian formations in Brazil are essentially unique in the world. The giant hydrocarbons accumulations have been discovered in them for the last decades, which nearly doubled the country’s oil and gas reserves, bringing the total recoverable reserves of oil and gas to more than 3 billion t and 4.7 trillion m3 correspondingly. The geology of sub-salt formations is closely related with the tectonic movements which occurred during the breakup of Gondwana super continent into the South American and the African continents. This took place 150 million years ago in the Early Cretaceous time. The salt of the Aptian formation is an excellent cap rock. The sub-salt reservoirs by their characteristics are simply super, oil is light, sweet and the source rocks are enriched by an organic matter. The Aaptian salt thickness spreading is limited, changing from the basin to the basin, the widest part of the salt is concentrated in the Santos basin – 400 km long and 2000 m thick. Further on, in the north direction, the thickness decreases and the width narrows down, and in the Sergipi Alagoas basin it already reaches 100 m.

 

Keywords: oil; gas; basin; continental slope; sub-salt; post-salt.

 

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UDC 550.836.2          DOI: 10.33285/2413-5011-2021-7(355)-20-25

 

SPACE REMOTE SENSING IN INFRARED WAVELENGTH RANGE WHEN SEARCHING FOR
HYDROCARBON DEPOSITS IN THE DOUALA BASIN OF THE REPUBLIC OF CAMEROON (p. 20)

 

Kamil Midkhatovich Karimov, Dr. of geol.-mineral. sci., Professor,

Akhmad Al Ali,

Timur Andreevich Vagapov,

Marat Andreevich Lonshakov

 

Kazan (Volga region) Federal University

18, Kremlyovskaya str., Kazan, 420008, Russian Federation,

e-mail: kamil1955@inbox.ru, alali.syy@gmail.com, tv-kzn@yandex.ru, maratlonsh@gmail.com

 

The research is based on thermovision tomography of the Earth's Crust by processing the Landsat-8 spectral-zonal satellite image in the thermal infrared wavelength range (8…14 microns) with a spatial pixel resolution of up to 60 meters.

Models of the thermodynamic field at the time of the survey were built – sections and maps of the thermal field and block-fault structures for the given depths with reference in geographic coordinates.

Zoning of the MVIA block for hydrocarbons prospecting was accomplished in the Republic of Cameroon. The endogenous flux of thermal radiation was used to study the geological structure of the medium with the classification of inhomogeneities by shape. On the basis of mapping faults and rocks with improved reservoir properties, zones of fluid flows and accumulations have been established, which can be natural reservoirs of hydrocarbons. Using the TWT method, two types of structural oil traps have been established: near-fault, which was penetrated by a productive well, and the erosion one, located on the ledge of the foundation block within two project wells.

 

Keywords: thermovision tomography; sounding; thermal field; satellite image; geological environment; block-fault structures; hydrocarbons.

 

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UDC 502.559(203):629.113          DOI: 10.33285/2413-5011-2021-7(355)-26-34

 

PROBLEMS OF THE TECHNIQUE OF THREE-DIMENSIONAL SEDIMENTATION MODELING (p. 26)

 

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

Vladimir Nikolaevich Borodkin2,3, Dr. of geol.-mineral. sci.,

Andrey Garevich Plavnik2,3, Dr. of tech. sci.,

Andrey Viktorovich Lukashov1,

Marina Valeryevna Komgort3,

A.A. Teplyakov4

 

1LLC "INGEOSERVICE"

211, Respublika str., Tyumen, 625019, Russian Federation,

e-mail: info@ingeos.info

 

2A. Trofimuk Institute of Petroleum 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 "LUKOIL–Engineering"

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

 

The paper deals with the problems of the geological basis of sedimentation modeling, numerical modeling and algorithms for numerical modeling of the sedimentation process. The principle of facies analysis and sequential stratigraphy was adopted as a geological basis. Numerical modeling is aimed at reconstructing the morphology and lithological properties of sedimentary bodies by computer simulation of the processes leading to the formation of sedimentary bodies.

Mathematical modeling algorithms are subdivided into three main complexes. The paper gives the characteristics of each of them. By the example of clinoforms of the Achimov strata in the Western Siberia, models of their sedimentation are identified, various forms of sedimentary bodies are given, examples of stratigraphic unconformities are shown, etc.

 

Keywords: sedimentation modeling; sequential stratigraphy; sedimentation basin; mathematical algorithms; clinoform.

 

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UDC 550.8.072          DOI: 10.33285/2413-5011-2021-7(355)-35-43

 

FACIAL MODELING OF THE ACHIMOV CLINOFORM DEPOSITS IN A POORLY
DIFFERENTIATED WAVE PATTERN ON THE EXAMPLE
OF THE SOROVSKOYE FIELD IN THE WESTERN SIBERIA (p. 35)

 

Roman Olegovich Kornikov,

Marina Sergeevna Miley,

Natalia Anatolevna Basanaeva

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: rokornikov@tnnc.rosneft.ru

 

Modeling of clinoformed Achimov deposits in the Western Siberia fields is discussed in many scientific publications, however, some peculiar features of sedimentation of fond-formed turbidite alluvial fans, as noted by many authors, often do not allow differentiating individual blades in the wave pattern and subsequent geological model, with which productive deposits can be associated. The presented work proposes to consider an example based on the analysis of the wave field, borehole information (geophysical surveys of wells, core, field geophysical studies, operation), regional geology, which contributes to the delineation of facies objects of the clinoform complex in conditions of the introduction of alluvial fans into the underlying sediments. The considered modeling approach makes it possible to identify hydro-dynamically separated bodies of the fond-formed part of the Achimov strata.

 

Keywords: the Achimov strata; facial model of clinoforms; 3D facial modeling.

 

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UDC 622.276.4          DOI: 10.33285/2413-5011-2021-7(355)-44-48

 

ASSESSMENT OF THE POTENTIAL FOR OIL RESERVES GROWTH
IN THINLY BEDDED RESERVOIR (p. 44)

 

Ernest Ravilevich Agishev

 

LLC "RN–BashNIPIneft"

86/1, Lenina str., Ufa, 450006, Republic of Bashkortostan, Russian Federation,

e-mail: agishev@yandex.ru

 

Vadim Evgenievich Andreev, Dr. of tech. sci., Professor,

Vyacheslav Vyacheslavovich Mukhametshin, Dr. of tech. sci., Professor,

Lyubov Sergeevna Kuleshova, Cand. of tech. sci., Associate professor,

Rustem Fazylovich Yakupov, Associate professor

 

Ufa State Petroleum Technological University

1, Kosmonavtov str., Ufa, 450064, Republic of Bashkortostan, Russian Federation,

e-mail: intnm@ya.ru, vv@of.ugntu.ru, markl212@mail.ru, rustem_geolog@mail.ru

 

The paper presents an example of the revision of the geological-geophysical information of the object composed of thinly bedded clay reservoirs. The application of an updated petrophysical model based on radioactive logging methods and the construction of a geological model using spectral modeling allowed a variable assessing of geological reserves and justifying the reserves transfer to the category of hard-to-recover reserves (HTRR). The result of the study will allow in future maintaining the production level of the subsurface user by putting the object into development.

 

Keywords: "ryabchik" reservoir; hard-to-recover reserves; clayey reservoir; anisotropy; oil reserves.

 

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UDC 622.276.1/.4:551.7.022          DOI: 10.33285/2413-5011-2021-7(355)-49-57

 

FACIAL HETEROGENEITY OF THE FRASNIAN KINDELSKY REEF AND ITS MANIFESTATION
IN THE PROCESS OF THE OIL DEPOSIT DEVELOPMENT (p. 49)

 

Victoria Valeryevna Kuzmina

 

LLC "SamaraNIPIneft"

18, Vilonovskaya str., Samara, 443010, Russian Federation,

e-mail: vvkuzmina2@rosneft.ru

 

Aleksander Petrovich Vilesov, Cand. of geol.-mineral. sci.

 

LLC "Gazpromneft–STC"

75–79, lit. D, Moika River embankment, St. Petersburg, 190000, Russian Federation,

e-mail: Vilesov.AP@gazpromneft-ntc.ru

 

Some peculiar features of the facies structure and development of a reef deposit of one of the isolated reefs of the Volostnovsky license area (Orenburg region) are considered. Within the reef reservoir, a complex distribution of porous-cavernous and cavernous-fractured rocks is observed, which is caused by the structure of different facies zones of the reef and post-sedimentary processes – paleokarst, hydrothermokarst, compaction and fracturing. Intensive manifestations of paleokarst in the reef body were established as a result of core studies. The Kindelsky reef is characterized by the asymmetry, which manifests itself in the identification of the frontal zone of the reef and the extended zone of the back reef slope. Asymmetry can be traced by 3D seismic survey data and when correlating well sections using well logging methods. Production wells within the reef trap open up zones with different reservoir rock characteristics. There is a noticeable difference in the performance of wells located in different facies zones of the Kindelsky reef. At the same time, in the course of development, there occurs an uneven development of reserves in facies. A rapid watering is observed due to selective filtration of water through highly permeable fractures and cavernous channels.

 

Keywords: the Frasnian reef; reef trap; oil deposit; facies; oil field development; well behavior; recovery of reserves.

 

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UDC 622.276.1/.4          DOI: 10.33285/2413-5011-2021-7(355)-58-70

 

RESEARCH AND ANALYSIS OF PREPARATION TO REGULAR DEVELOPMENT
OF A SMALL COMPLICATEDLY-COMPOSED FIELD WITH ABNORMALLY
HIGH RESERVOIR PRESSURE AND TEMPERATURE (
ñ. 58)

 

Mikhail Yurievich Akhapkin, Cand. of tech. sci.,

Natalia Petrovna Efimova,

Olga Vladimirovna Lomakina,

Dmitriy Vladimirovich Solopov

 

Federal State Institution "Scientific Research Institute for System Analysis of the Russian Academy of Sciences"

36, bld. 1, Nakhimovsky prosp., Moscow, 117218, Russian Federation,

e-mail: iafanaskin@niisi.ras.ru

 

The paper considers field data accumulation process in the course of a complicatedly-composed field exploration. An initiative attempt to replace the results of targeted laboratory and field studies, preparing deposits (field) for correct design and industrial development, is analyzed by the results of the very industrial development of deposits (fields), which began in conditions of insufficient knowledge of the developed objects. Consideration and analysis are carried out on the example of a small multi-layer oil and gas condensate field, the natural feature of which is the initial presence of abnormally high reservoir pressure, de-compaction of the reservoir rock and high reservoir temperature.

 

Keywords: exploration; prospecting-appraisal and exploration wells; abnormally high reservoir pressure; de-compacted collector; high reservoir temperature; preparation for industrial development.

 

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UDC 622.276.42          DOI: 10.33285/2413-5011-2021-7(355)-71-77

 

ABSOLUTE PERMEABILITY AND VOID SPACE STRUCTURE OF RESERVOIRS
IN THE WESTERN SIBERIA (p. 71)

 

Rasul Tukhbatullovich Akhmetov, Cand. of tech. sci., Professor at the Department of Oil and Gas Field Exploration and Development,

Alina Mikhaylovna Malyarenko, Senior lecturer at the Department of Oil and Gas Field Exploration and Development,

Lyubov Sergeevna Kuleshova, Cand. of tech. sci., associate professor at the Department of Oil and Gas Field Exploration and Development,

Vyacheslav Vyacheslavovich Mukhametshin, Dr. of tech. sci., Professor at the Department of Oil and Gas Field Exploration and Development,

Albina Rinatovna Safiullina

 

Ufa State Petroleum Technological University

1, Kosmonavtov str., Ufa, 450064, Republic of Bashkortostan, Russian Federation,

e-mail: vsh@of.ugntu.ru, m_alina_m@mail.ru, vv@of.ugntu.ru, markl212@mail.ru.

 

It is shown that the void space structure has a significant effect on the quantitative relationships between the filtration and capacitance properties of reservoirs. The paper considers the issues of absolute permeability coefficient quantitative estimation based on capillary pressure curves. When calculating the absolute permeability, it is proposed to use a dumbbell model of the void space, in which the filtration channels are represented by alternating pores and interstitial constrictions. A method for calculating hydraulic tortuosity based on capillary pressure curves using a dumbbell model is presented. The hydraulic tortuosity is physically explained by the expansion of the filtration lines in the pores and their narrowing in the interstitial channels.

 

Keywords: structure of void space; capillarimetry; hydraulic tortuosity.

 

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IN MEMORY OF A.G. LACHKOV

 

 

 

 

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