Geology, Geophysics and Development of Oil and Gas Fields

e-mail: Aleksej.Gabnasyrov@pnn.lukoil.com, Ivan.Putilov@pnn.lukoil.com, Semen.Koryakin@pnn.lukoil.com, Ekaterina.Vinokurova@pnn.lukoil.com, Natalja.Gavrilova@pnn.lukoil.com, Alexey.Yuzhakov@pnn.lukoil.com

The object of the study is unconventional productive oil and gas source rocks of the Domanic formation on the territory of the Khoreyver depression, Kolvinsky mega-arch, Denisovsky trough and the Pechora-Kozhvinsky mega-arch. Based on the results of the study, a conceptual model of hydrocarbon reservoirs of the Domanic formation was proposed, the main criteria of the prospects for the Domanic formation reservoirs were identified, three-dimensional basin modeling was carried out, based on which the amount of initial total geological resources were estimated.

Keywords: Timan-Pechora oil and gas province field; Domanic formation; shale oil; basin modeling.

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UDC 553.98+550.812 DOI: 10.33285/2413-5011-2021-1(349)-8-18

PROSPECTS OF OIL AND GAS POTENTIAL OF PRE-JURASSIC COMPLEX IN THE SOUTH
OF THE REPUBLIC OF KALMYKIA BASED ON THE NEWEST GEOLOGICAL
AND GEOPHYSICAL DATA (p. 8)

Yury Vyacheslavovich Kuranov,

Vadim Foatovich Sharafutdinov, Dr. of geol.-mineral. sci.

LLC "LUKOIL–Engineering"

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

e-mail: yvkuranov@yandex.ru, vsharaf@inbox.ru

Yulia Andreyevna Savina

LUKOIL−Engineering Limited VolgogradNIPImorneft Branch Office in Volgograd

96, Lenin prosp., Volgograd, 400078, Russian Federation,

e-mail: damsel1982@yandex.ru

Andrey Nikolaevich Stepanov, Cand. of geol.-mineral. sci.

North-Caucasus Branch of the public organization "International Academy of Mineral Resources"

e-mail: stepanovandres@yandex.ru

Currently, the oil and gas industry of Kalmykia is based on oil and gas fields, confined, mainly, to the Mesozoic deposits in the southern part of the Republic. The resource potential of the Mesozoic deposits hasn`t been fully developed, but a significant increase in the resource base of hydrocarbons in the South of Kalmykia can only be achieved by expanding the traditional stratigraphic range of geological exploration. In recent years, a significant amount of geophysical, geochemical and seismic surveys and deep drilling have been carried out in the Eastern Pre-Caucasus. Analysis of their results allows assessing the prospects of oil and gas content of the Pre-Jurassic deposits of the region more highly than it was previously assumed. The authors propose and substantiate the Permian-Triassic and Paleozoic sediment complexes as priority areas for further exploration in the South of the Republic of Kalmykia. Priority prospective reservoirs were identified for both complexes were identified and recommendations for further improvement of exploration efficiency according to the proposed priority trends are presented.

Keywords: prospects of oil and gas potential; geological exploration; Karpinsky ridge; East-Manych trough; Republic of Kalmykia; Permian-Triassic and Paleozoic deposits; Neftekumsk formation.

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UDC 553.982.23 DOI: 10.33285/2413-5011-2021-1(349)-19-23

FIELD GEOPHYSICAL AND LITHOLOGICAL CHARACTERISTICS OF THE BAZHENOV SUITE
INTERVALS OF THE KRASNOLENINSKY ARC WITH INDUSTRIAL OIL INFLOWS (p. 19)

Maxim Aleksandrovich Markin¹,

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

Arkadiy Romanovich Kurchikov^2,3, Dr. of geol.-mineral. sci.,

Oleg Arkadievich Smirnov⁴, Cand. of geol.-mineral. sci.

¹LLC "Lithosfera"

34/1, Narodnogo Opolcheniya str., Moscow, 123423, Russian Federation,

e-mail: info@lithosfera.ru

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 "INGEOSERVICE"

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

e-mail: info@ingeos.info

In the course of the research, the wells, which were subjected to field-geophysical studies, cores as well as the results of testing the Yu0 formation were analyzed. This made it possible to detail the section of the Bazhenov formation, to identify the main types of lithotypes in it, with which industrial oil inflows are associated.

Keywords: Krasnoleninsky arc; Bazhenov suite; field geophysical research; core analysis; lithotypes.

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UDC 622.276 DOI: 10.33285/2413-5011-2021-1(349)-24-29

GEOLOGICAL BASIS FOR THE DESIGN AND ANALYSIS OF THE CURRENT STATE
OF THE "BLOCK 63" OFFSHORE FIELD DEVELOPMENT (p. 24)

Stanislav Ivanovich Shiyan, Cand. of tech. sci.,

Diomande Ble Hugues

Kuban State Technological University

2, Moskovskaya str., Krasnodar, 350072, Russian Federation,

e-mail: akngs@mail.ru, huguesdiomande@gmail.com

The paper considers the geological structure of the “Block 63” offshore field, located in the Congo basin and extending over 600 km. The tectonic-sedimentary evolution of the basin is described, which is divided into the rift phase of the maximum opening of the basin and the marine transgressive phase, which are separated by the period of evaporites formation. The proven reserves of the "Block 63" offshore field make more than 3,5 billion barrels and 1,2 billion barrels of non-recoverable reserves. The reserves of the Tambor and the North Tambor deposits are estimated at 295 million barrels. It is assumed that these reserves will be extracted using 17 wells (10 production wells and 7 injection wells).

Keywords: brief geological and field characteristics; tectonics and tectonic-sedimentary evolution; general information about the field; characteristics of the geological structure; reserves, properties and composition of oil and gas; field development status; subsea oil production system.

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UDC 622.276+532+519.876 DOI: 10.33285/2413-5011-2021-1(349)-30-38

METHODOLOGY OF SELECTING THE OPTIMAL OBJECTIVE FUNCTION
FOR A RESERVOIR MODEL HISTORY MATCHING (p. 30)

Grachik Araikovich Eremyan

Petroleum Learning Centre of Tomsk Polytechnic University

4a, Usov str., Tomsk, 634034, Russian Federation,

e-mail: eremyanga@hw.tpu.ru

The article is devoted to the problem of selecting an objective function formulation for automated history matching of reservoir models of oil and gas fields. To carry out history matching, it is necessary to define the objective function that describes the discrepancy between simulation results and the observed data. The formulation of the objective function is important because its value directly affects the optimization process, allowing the algorithm to move in the right direction in the search of solutions. The purpose of the study is to develop a methodology for selecting the optimal objective function for a hydrocarbon reservoir model history matching. The research methods are comparative analysis and computational experiments using a synthetic model and a model of a real oil field located in Siberia.

Based on the results of the study, a methodology for selecting the optimal objective function for history matching of a geological-hydrodynamic model of a hydrocarbon reservoir depending on the adaptation task was developed and described. The proposed methodology allows achieving good quality history matching with minimal computational costs compared to history matching without the methodology.

Keywords: methodology for an objective function selection; geological-hydrodynamic modeling; oil field; numerical model; objective function; mismatch expression; mismatch normalization; objective function components; weight coefficients; automated history matching; optimization algorithms; history matching quality; history matching efficiency.

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УДК 550.4+543.544.3 DOI: 10.33285/2413-5011-2021-1(349)-39-43

APPLYING RESERVOIR GEOCHEMISTRY METHODS TO DETERMINE PERFORMANCE
OF EACH OF JOINTLY OPERATED FORMATIONS WITH DIFFERENT
OIL MOLECULAR COMPOSITION (p. 39)

Arnold Yakovlevich Kuklinsky, Cand. of chemical sci.,

Alexey Nikolaevich Moroshkin, Cand. of geol.-mineral. sci.,

Alexey Vladimirovich Ermolovsky, Cand. of tech. sci.,

Yuliya Stanislavovna Tarasova,

Mikhail Aleksandrovich Nevestenko,

Alena Aleksandrovna Zakharchenko

LUKOIL−Engineering Limited VolgogradNIPImorneft Branch Office in Volgograd

96, Lenin prosp., Volgograd, 400078, Russian Federation,

e-mail: Arnold.Kuklinsky@lukoil.com, Alexey.Moroshkin@lukoil.com, Alexey.Ermolovsky@lukoil.com, Yuliya.Tarasova@lukoil.com, Mikhail.Nevestenko@lukoil.com, Alena.Zakharchenko@lukoil.com

Sergey Yuryevich Shtun, Cand. of geol.-mineral. sci.,

LLC "LUKOIL–Nizhnevolzhskneft"

1, bld. 2, Admiralteiskaya str., Astrakhan, 414000, Russian Federation,

e-mail: Sergej.Shtun@lukoil.com

Geochemical studies of oil from the wells of the Caspian Sea water area have been performed. Molecular studies of oil gasoline fractions were carried out by chromatographic analysis methods. The molecular composition of oil samples obtained from different wells in period from 2016 to 2020 has been compared. The paper describes geochemical method of oil monitoring and shows the possibility of identification whether a hydrocarbon fluid belonged to the formation being developed.

Keywords: organic geochemistry, geochemical technologies; geochemical surveys; methods of reservoir geochemistry; molecular analysis; the identity of the hydrocarbon fluid; oil–oil correlation; monitoring; gasoline fractions of oil.

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UDC 622.276.031 DOI: 10.33285/2413-5011-2021-1(349)-44-48

ANALYSIS OF THE METHODS APPLIED FOR JUSTIFICATION OF THE RESIDUAL OIL SATURATION COEFFICIENT OF OBJECTS WITH HARD-TO-RECOVER OIL RESERVES (p. 44)

Evgeniy Sergeevich Azarov,

Elizaveta Sergeevna Taracheva

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

143а, Respublika str., Tyumen, 625000, Russian Federation,

e-mail: AzarovES@tmn.lukoil.com, TarachevaES@tmn.lukoil.com

According to the "Methodological recommendations on the composition and design rules submitted for state expertise of materials on the feasibility study of oil recovery factors", when determining the residual oil saturation coefficient, graphs of the dependences of the initial oil saturation, residual oil saturation and displacement coefficient on permeability, the residual oil saturation coefficient on the initial oil saturation, the displacement factor from the initial oil saturation or other complex parameters are plotted. However, the proposed approach does not always allow achieving the maximum possible correlation coefficients. The presented work analyzes the results of core experiments on oil displacement performed for the VK1 and VK2-3 formations of the Krasnoleninskoye field, the minimum correlations for the direct and reverse comparison and the averaged version are performed. Estimation of residual oil saturation was carried out by various methods: processing of microprobe data, micro-lateral logging and the Surguchev method.

Keywords: residual oil saturation coefficient; displacement ratio; initial oil saturation; zone of residual oil reserves; capillary number; linear filtration rate; micro-logging; zonal distribution of residual oil saturation.

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UDC 622.276.1/.4(571.1) DOI: 10.33285/2413-5011-2021-1(349)-49-53

ASSESSMENT OF CHANGE OF OIL PHYSICAL-CHEMICAL PROPERTIES
IN THE POTANAI-KARTOPINSKOE FIELD DURING DEVELOPMENT (p. 49)

Oksana Aleksandrovna Gorbacheva,

Vitaliy Sergeevich Druchin,

Artem Samvelovich Kirishev

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

143а, Respublika str., Tyumen, 625000, Russian Federation,

e-mail: GorbachevaOA@tmn.lukoil.com, DruchinVS@tmn.lukoil.com, KirishevAS@tmn.lukoil.com

On the example of the Potanai-Kartopinskoye field, the changes in the properties of reservoir oil (density, viscosity) in the course of development were analyzed. Hydrocarbon reserves calculation requires taking into account the properties of oil in the initial state, while the rejected oil samples due to the influence of development should be further used to assess the current state of hydrocarbons properties within the reservoir.

Keywords: oil density; oil viscosity; water cut; water injection; rejection.

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UDC 622.276.1/.4(569.1) DOI: 10.33285/2413-5011-2021-1(349)-54-58

OIL POTENTIAL ASSESSMENT AND PROBLEMS
OF RUMILAN FIELD DEVELOPMENT (SYRIA) (p. 54)

Alali Valid¹,

Nikolai Aleksandrovich Eremin^1,2, Dr. of tech. sci., Professor

¹National University of Oil and Gas "Gubkin University"

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

e-mail: walidalali@gubkin.ru

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

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

e-mail: ermn@mail.ru

The paper studies the opportunities to improve development efficiency of Rumilan field. The main problems of fields development as well as modern highly efficient development methods are presented. The existing oil and gas reserves at the Rumilan field are analyzed.

The possibility of using modern forecasting methods to assess the gas and polymer impact on the development object is considered. An architecture of a neural network is presented that can be used to predict the impact and evaluate the efficiency of oil fields development.

Keywords: Rumilan field; development; potential; forecasting; stocks; gas and polymer impact; neural network; suite.

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UDC 55:550.822.3+622.244 DOI: 10.33285/2413-5011-2021-1(349)-59-63

GENERALIZATION AND INTERPRETATION OF THE DATA OBTAINED DURING THE FULL CYCLE MONITORING OF SLUDGE WASTE UNDERGROUND DISPOSAL (p. 59)

Denis Arkadyevich Kurchikov^1,2, Cand. of geol.-mineral. sci., associate professor,

Andrey Garievich Plavnik^1,2, Dr. of tech. sci., Professor,

¹A. 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: kurchikov.d@mail.ru, e-mail: plavnik@ikz.ru

²Tyumen Industrial University (TIU)

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

The paper presents the results of monitoring of sludge waste injection into absorption well at one of the oil and gas fields in the Western Siberia. To control the change in the fractured space of the object, being in operation, some approaches based on standard methods for interpreting hydrodynamic studies at unsteady modes and methods used when analyzing hydraulic fracturing processes have been proposed and tested. It is shown that over time, there occur processes that change the reservoir properties and lead to a deterioration of the fracture domain holding capacity. The observed abrupt changes in operating parameters indicate periodic significant changes in the fracture space and filtration-capacitive properties of the reservoir.

Keywords: oil and gas field; disposal of sludge waste; hydraulic fracturing; ecology.

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