ISSN 0207-2351

Scientific-technical journal

OILFIELD ENGINEERING

                                                                                                    published since 1965

January 2020                           ¹ 1 (613)                      12 issues per year

 

CONTENÒS

 

DEVELOPMENT OF OIL AND GAS-OIL FIELDS

 

Kazakov K.V., Korepanova V.S., Nikitin V.T., Nikiforov V.P. About approaches and some results of the experience generalization of oil deposits development in the Timano-Pechora province (p. 5‑12)

 

Alimkhanov R.T., Rozhkova V.V., Mazitov R.F. Use of data mining tools when planning of non-stationary water flooding (p. 13‑19)

 

Sidorov M.L., Pronin V.A., Kuznetsov V.Yu., Afanaskin I.V., Korolev A.V., Yalov P.V. Non-structured grids parallel generator development for oil field models and one-core version simulator tests for oil and water two-phase flow (p. 20‑27)

 

Egorov A.F., Insafov R.M., Rakhmatullin A.A. Estimation of water-gas effect efficiency on a conditionally homogeneous and heterogeneous oil-saturated collectors (p. 28‑31)

 

Iktisanov V.A. A method for evaluation of the effectiveness of injection wells operation (p. 32‑35)

 

METHODS OF PRODUCING EFFECT ON A DEPOSIT AND RAISING OIL RECOVERY

 

Novikov V.A., Martyushev D.A. On the problem of enhancing the efficiency of terrigenous reservoirs acid treatments (p. 36‑40)

 

Kornev E.V., Rakhmatullin A.A., Khisamutdinov N.I. Assessment of the influence of the collector heterogeneity degree on the gas and water distribution on the oil displacement in the well bottom zone and in the formation (p. 41‑43)

 

RESEARCH OF FORMATIONS AND WELLS

 

Mett D.A., Privoznova A.E., Nikolaeva T.N. Results of field tests for injection of air and water at the Middle-Nazymsky deposit (p. 44‑47)

 

Batalov S.A., Andreev V.E., Lobankov V.M., Dubinskiy G.S., Khuzin R.R. Improvement of the main provision components of oil recovery system in case of a reservoir extreme control (p. 48‑54)

 

TECHNIQUE AND TECHNOLOGY OF OIL PRODUCTION

 

Bakirov D.L., Fattakhov M.M., Babushkin E.V., Kovalev V.N., Shurupov A.M., Fatikhov V.V., Teregulov O.F. Improvement of technologies for horizontal wells construction (p. 55‑59)

 

Isaev A.A., Malykhin V.I., Sharifullin A.A. Feasibility evaluation of vacuum presence in a well annulus (p. 60‑64)

 

Bakirov D.L., Burdyga V.A., Fattakhov M.M., Gritsay G.N., Belousov A.V., Antonov V.V. Increase of a well cementing stability to dynamic influence (p. 65‑70)

 

ECONOMIC ASPECTS OF OIL- AND GAZ-PRODUCING INDUSTRY PROGRESS

 

Akhmetgareev V.V., Butusov E.V., Yartieva M.A. Mathematical modeling when analyzing economic indicators sensitivity of an oil fields development project (p. 71‑78)

 

 

Information on the articles

 

UDC 622.276.1/.4          DOI: 10.30713/0207-2351-2020-1(613)-5-12

 

ABOUT APPROACHES AND SOME RESULTS OF THE EXPERIENCE GENERALIZATION
OF OIL DEPOSITS DEVELOPMENT IN THE TIMANO-PECHORA PROVINCE (p. 5)

 

Kirill Viktorovich Kazakov,

Veronika Sergeevna Korepanova, Cand. of tech. sci.,

Vladimir Trofimovich Nikitin,

Valery Pavlovich Nikiforov

 

LLC "LUKOIL−Engineering"

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

e-mail: Kirill.Kazakov@lukoil.com

 

The paper describes the approach to conducting of generalized studies of a lot of fields. The approach has been tested at the deposits of LLC "LUKOIL−Komi" and some results are presented. Based on the field data of well operation, the state balance of reserves and project documentation for development, a unified database of geological-technological indicators has been compiled for subsequent analysis. The problems of identification of one and the same geological entities in different sources with different names of the objects under study and the degree of detail are solved. The variability of the displacement characteristics for the development objects with similar geological-physical characteristics was studied. The geological and technological factors affecting the displacement characteristics for the main oil- and gas-bearing complexes of the region are determined. Based on the methods of multivariate correlation-regression analysis, statistical equations are derived for the estimation of the oil recovery factor, which are based on current design decisions and modern development technologies, providing for the forecast reliability increase. Some algorithms are developed and implemented in software for automatic screening and selection of the most influential factors. The clustering of the development objects is carried out and analogy groups were identified. The generalized displacement characteristics of various types are obtained that describe the dynamics of the main development indicators for groups of objects with similar geological, physical and technological conditions. The possibility of achieving the approved coefficient of oil recovery (COR) is assessed. Problematic objects that require additional geological and technological measures for achievement of the projected oil recovery factor (COR) are identified, as well as the objects, the existing development system of which is effective, and can possibly exceed the projected COR. The results of the study are used in the express projecting of the development within the frames of the evaluation of geological exploration projects and integrated projecting.

 

Keywords: field data on the operation of wells; correlation-regression analysis; development objects; evaluation of geological exploration projects.

 

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UDC 622.276.43          DOI: 10.30713/0207-2351-2020-1(613)-13-19

 

USE OF DATA MINING TOOLS WHEN PLANNING OF NON-STATIONARY WATER FLOODING (p. 13)

 

Rustam Tagirovich Alimkhanov,

Valeriya Valerievna Rozhkova,

Ruslan Faritovich Mazitov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

143à, Respublika str., Tyumen, 625026, Tyumen region, Russian Federation,

e-mail: AlimhanovRT@tmn.lukoil.com; RozhkovaVV@tmn.lukoil.com; MazitovRuF@tmn.lukoil.com

 

A non-stationary approach to the choice of the sites for non-stationary water flooding by Data Mining methods is proposed and considered. Using these methods, the previously gained experience in this field is analyzed.

 

Keywords: data mining; non-stationary flooding; enhanced oil recovery; efficiency; cluster analysis.

 

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UDC 622.276.1/.4.001.57          DOI: 10.30713/0207-2351-2020-1(613)-20-27

 

NON-STRUCTURED GRIDS PARALLEL GENERATOR DEVELOPMENT FOR OIL FIELD MODELS
AND ONE-CORE VERSION SIMULATOR TESTS FOR OIL AND WATER TWO-PHASE FLOW (p. 20)

 

Mikhail L′vovich Sidorov,

Vitaly Alekseevich Pronin, Cand. of phyz.-math. sci.,

Vladimir Yurievich Kuznetsov

 

Federal State Unitary Enterprise "The Russian Federal Nuclear Center − All-Russian Scientific Research Institute of Experimental Physics"

37, prosp. Mira, Sarov, 607188, Nizhegorodskiy region, Russian Federation;

 

Ivan Vladimirovich Afanaskin, Cand. of tech. sci.,

Alexander Vasilievich Korolev, Cand. of tech. sci.,

Petr Vladimirovich Yalov

 

Scientific Research Institute of System Development of the Russian Academy of Sciences

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

e-mail: ivan@afanaskin.ru

 

The article describes method of non-structured grids parallel generation, which are applied for non-homogenious geological structures description along oil-gas fields numerical simulation. Proposed method has high speed of grid generation. Published testing results were calculated on real field numerical model by one-core version simulator of two-phase oil and gas flow.

 

Keywords: non-structured grid; corner-point method; parallel computing; hydrodynamic model; two-phase flow.

 

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UDC 622.276.42/.43          DOI: 10.30713/0207-2351-2020-1(613)-28-31

 

ESTIMATION OF WATER-GAS EFFECT EFFICIENCY ON A CONDITIONALLY HOMOGENEOUS
AND HETEROGENEOUS OIL-SATURATED COLLECTORS (p. 28)

 

Andrey Fedorovich Egorov,

Rishat Minshagitovich Insafov

 

CJSC "Aloil"

63, Engels str., Bavly-city, 423930, Republic of Tatarstan, Russian Federation,

e-mail: aloil116@mail.ru

 

Ainur Akhatovich Rakhmatullin

 

LLC NPO "Neftegaztekhnologiya"

96/2, Revolutsionnaya str., Ufa, 450078, Republic of Bashkortostan, Russian Federation,

e-mail: npongt@gmail.com

 

The paper discusses the results of comparison of oil displacement efficiency from conventionally homogeneous and heterogeneous formations according to the results of a numerical study of the model of water-gas stimulation of a formation. It is shown that overcoming of the initial pressure gradient effect on the displacement with gas injection is more intense with the rock permeability decrease and gas content increase. At the same time, a water-flooding increase is observed at a low gas content for a homogeneous formation and a decrease of the water-flooding rate with an increase in gas content for a heterogeneous formation. Additional oil production with a water-gas exposure and an increase in gas content (up to 12 % and higher) during a prolonged displacement is comparable in efficiency both for a homogeneous formation and for a heterogeneous one, as since the gas injection, there occurs alignment of displacement fields due to the increase of coverage in low-permeable zones.

 

Keywords: oil displacement; water-gas effects; water-flooding; oil flow rate.

 

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UDC 622.276.432          DOI: 10.30713/0207-2351-2020-1(613)-32-35

 

A METHOD FOR EVALUATION OF THE EFFECTIVENESS OF INJECTION WELLS OPERATION (p. 32)

 

Valery Askhatovich Iktisanov, Dr. of tech. sci., Professor

 

"TatNIPIneft" of PJSC "Tatneft"

32, M. Jalil str., Bugulma, 423233, Republic of Tatarstan, Russian Federation,

e-mail: iktissanov@tatnipi.ru

 

Traditionally, all oil companies pay much less attention to injection wells than to production wells. The paper estimates the effectiveness of injection wells operational modes with account of the "oil production" parameter. To do this, it is proposed to determine the derivative of the total accumulated oil production (flow rate) by the site’s bottom hole pressure (repression, depression) in each of the production and injection wells. The entered parameter accounts of the whole set of factors: heterogeneity of a formation, mutual influence of wells, wells operational modes, development history, physical-chemical properties of fluids, etc. The proposed method allows to compare the effectiveness of the operational modes of each of the production and injection wells and to draw preliminary conclusions on the adjustment of their operational modes.

 

Keywords: injection and production wells; flow rate; well operational mode; cumulative oil production.

 

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UDC 622.276.63          DOI: 10.30713/0207-2351-2020-1(613)-36-40

 

ON THE PROBLEM OF ENHANCING THE EFFICIENCY OF TERRIGENOUS RESERVOIRS
ACID TREATMENTS (p. 36)

 

Vladimir Andreevich Novikov,

Dmitriy Aleksandrovich Martyushev, Cand. of tech. sci.

 

Perm National Research Polytechnic University

29, Komsomolsky prosp., Perm, 614990, Russian Federation,

e-mail: novikov.vladimir.andr@gmail.com; martyushevd@inbox.ru

 

The article studies the experience of using various types of acid treatments in terrigenous reservoirs of oil fields in the Perm region. Up to 60 % of this kind of measures does not reach the planned oil production rates, as a rule, for technological reasons. In this regard, an important task seems to be the optimization of acid treatment technology in oil deposits with a terrigenous reservoir type. Its solution is based on a series of filtration and X-ray tomographic tests on core samples of the Krasnoyarsk-Kuedinskoye and Pavlovskoye oil fields, characterized by a low content of carbonate minerals. According to the results of studies, it was found that the acid exposure effect, expressed as an initial permeability increase, is achieved only in experiments with pre-injection of a buffer fluid, being nothing else but a hydrochloric acid solution. Recommendations on the acid treatment technology implementation are given for the deposits under consideration.

 

Keywords: acid treatment; oil fields of the Perm region; filtration studies; X-ray tomography; terrigenous reservoir; acid composition; oil well stimulation; carbonateness.

 

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UDC 622.276.43:661.97          DOI: 10.30713/0207-2351-2020-1(613)-41-43

 

ASSESSMENT OF THE INFLUENCE OF THE COLLECTOR HETEROGENEITY DEGREE
ON THE GAS AND WATER DISTRIBUTION ON THE OIL DISPLACEMENT
IN THE WELL BOTTOM ZONE AND IN THE FORMATION (p. 41)

 

Evgeny Vladimirovich Kornev

 

LLC "BayTex"

51, Leningradskaya str., Buguruslan, 461630, Orenburg region, Russian Federation

 

Ainur Akhatovich Rakhmatullin,

Nail Ismagzamovich Khisamutdinov, Dr. of tech. sci., Professor

 

LLC NPO "Neftegaztekhnologiya"

96/2, Revolutsionnaya str., Ufa, 450078, Republic of Bashkortostan, Russian Federation,

e-mail: npongt@gmail.com

 

The paper presents the results of the study of carbon dioxide and water distribution in a heterogeneous reservoir and concludes that there occurs an oil viscosity decrease during the injection of small volumes rims (18...20 portions) and the displacement coefficient increases by more than 64 %. According to the results of the studies, it was found expedient to pump alternating rims of small portions of CO2 and water into the reservoir under field conditions.

 

Keywords: heterogeneous collector; oil viscosity; carbon dioxide; bottom hole formation zone.

 

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UDC 622.276.031.431.3:532.5+622.276.652          DOI: 10.30713/0207-2351-2020-1(613)-44-47

 

RESULTS OF FIELD TESTS FOR INJECTION OF AIR AND WATER
AT THE MIDDLE-NAZYMSKY DEPOSIT (p. 44)

 

Dmitriy Aleksandrovich Mett,

Alexandra Evgenievna Privoznova,

Tatiyana Nikolaevna Nikolaeva

 

LLC "LUKOIL−Engineering"

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

e-mail: Dmitrij.Mett@lukoil.com; Alexandra.Privoznova@lukoil.com

 

The paper considers the determination of the causes of filtering resistances that occur during the implementation of field tests for the injection of water and air into the Upper Jurassic deposits, based on a comparison of the results of hydrodynamic studies, laboratory studies and hydrodynamic modeling of the thermal gas exposure process.

 

Keywords: hydrodynamic studies; thermal gas exposure; field tests.

 

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UDC 532.5:553.98:621.317.33          DOI: 10.30713/0207-2351-2020-1(613)-48-54

 

IMPROVEMENT OF THE MAIN PROVISION COMPONENTS OF OIL RECOVERY SYSTEM
IN CASE OF A RESERVOIR EXTREME CONTROL (p. 48)

 

Sergey Alekseevich Batalov, Cand. of tech. sci.,

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

Gennadiy Semenovich Dubinsky, Cand. of tech. sci.,

 

Institute of Strategic Studies of Republic of Bashkortostan

129/3, Octyabr prosp., Ufa, 450075, Republic of Bashkortostan, Russian Federation,

e-mail: intnm@ya.ru

 

Valery Mikhailovich Lobankov, Dr. of tech. sci.,

 

Ufa State Petroleum Technological University

130/2, Mendeleev str., Ufa, 450078, Republic of Bashkortostan, Russian Federation

 

Rinat Raisovich Khuzin, Dr. of tech. sci.

 

LLC "Karbon-Oil"

25, Surgutskaya str., Almetyevsk, 423450, Republic of Tatarstan, Russian Federation,

e-mail: karbon@tatais.ru

 

The article presents the results of the study of the main components of the oil recovery system provision, namely, mathematical, technical and information-software. As the oil recovery rate becomes more complex, the priority requirements are issued to mathematical software improvement, the algorithms of which allow to derive stable structures of technical and information software. It is established that the information content and speed of the selective survey of the deep sensors in the operating wells is evaluated in the real-time mode of the geophysical information-management system. It is shown that the main components of the provision system are subjected to only minor correction.

 

Keywords: productive formation; operating wells; oil recovery system; geophysical information-management system.

 

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UDC 622.24.002.2          DOI: 10.30713/0207-2351-2020-1(613)-55-59

 

IMPROVEMENT OF TECHNOLOGIES FOR HORIZONTAL WELLS CONSTRUCTION (p. 55)

 

Daniyar Lyabipovich Bakirov, Cand. of tech. sci.,

Marsel Masalimovich Fattakhov,

Eduard Valerievich Babushkin, Cand. of tech. sci.

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

143à, Respublika str., Tyumen, 625026, Russian Federation,

e-mail: BakirovDL@tmn.lukoil.com; Fattahovmm@tmn.lukoil.com; BabushkinEV@tmn.lukoil.com

 

Vitaliy Nikolaevich Kovalev,

Alexander Matveevich Shurupov,

Vadim Valerievich Fatikhov,

Oleg Faritovich Teregulov

 

LLC "LUKOIL−Western Siberia"

20, Pribaltiyskaya str., Kogalym, 628486, Tyumen region, Khanty-Mansi autonomous territory − Yugra, Russian Federation,

e-mail: Vitaliy.Kovalev@lukoil.com; Aleksandr.Shurupov@lukoil.com; Vadim.Fatihov@lukoil.com; Oleg.Teregulov@lukoil.com

 

The practical results of optimization of horizontal and multilateral wells constructions are presented. Wells construction of a three-column design provides a significant increase of commercial drilling speed, compared with the base case. A set of technical-technological solutions for the implementation of accident-free construction has been developed, further ways of cost optimization have been proposed.

 

Keywords: horizontal well; design optimization; casing string; multilateral well; cost reduction.

 

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UDC 622.276.5.05          DOI: 10.30713/0207-2351-2020-1(613)-60-64

 

FEASIBILITY EVALUATION OF VACUUM PRESENCE IN A WELL ANNULUS (p. 60)

Anatoliy Andreevich Isaev, Cand. of tech. sci.,

Vladimir Ivanovich Malykhin,

Almaz Amirzyanovich Sharifullin, Cand. of tech. sci.

 

Sheshmaoil Management company LLC

a/ya 192, P.O. No. 8, Almetyevsk, 423458, Republic of Tatarstan, Russian Federation,

e-mail: isaeff-oil@yandex.ru

 

The article provides information on the feasibility evaluation of the introduction of the KOGS-type equipment for gas evacuation from the annular space and gives practical examples. The basic results of the KOGS equipment introduction are presented: thus, the additional oil production made 24,31 tons/day, i. e. 1,28 tons/day per one KOGS installation and 0,33 tons/day per one oil well. The feasibility evaluation of the vacuum evacuation use depending on the operation conditions of an oil deposit is shown. The recognition of the gas evacuation equipment from a well as a gas separation stage is substantiated, because a part of the gas is being removed from the oil during the evacuation process.

 

Keywords: a set of equipment for gas evacuation from a well; gas removal; annular space of a well; gas separation.

 

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UDC 622.245.42.001+622.276.66          DOI: 10.30713/0207-2351-2020-1(613)-65-70

 

INCREASE OF A WELL CEMENTING STABILITY TO DYNAMIC INFLUENCE (p. 65)

 

Daniyar Lyabipovich Bakirov, Cand. of tech. sci.,

Vitaly Aleksandrovich Burdyga, Cand. of tech. sci.,

Marsel Masalimovich Fattakhov,

Grigory Nikolaevich Gritsay,

Vasily Vladimirovich Antonov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

143a, Respublika str., Tyumen, 625026, Russian Federation,

e-mail: BakirovDL@tmn.lukoil.com; BurdygaVA@tmn.lukoil.com; Fattahovmm@tmn.lukoil.com; GritsayGN@tmn.lukoil.com; AntonovVV@tmn.lukoil.com

 

Andrey Vladimirovich Belousov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19, Tsentralnaya str., Kogalym, 628486, Tyumen region, Khanty-Mansi autonomous territory − Yugra, Russian Federation,

e-mail: BelousovAV@tmn.lukoil.com

 

The lack of real data on possible ways to reduce the negative impact on a well cementing stability in the scientific-technical literature requires the development of a unified approach aimed at reduction of the dynamic load from the drill pipe string to the cement stone during technological operations. The article presents the results of modeling stresses arising in the cement ring of a well under a dynamic impact. The importance of the use of pipes with increased groups of strength and wall thickness, the magnitude of the casing string eccentricity, the state of the cement stone contact with the environment is fixed. It is proved that the main direction of maintaining the support tightness is the development of grouting compositions with increased elastic-deformation characteristics.

 

Keywords: dynamic impact; hydraulic fracturing of rocks; well cementing; digital twin; stresses in a well cementing; elastic properties of cement stone.

 

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UDC 338.23:622.276+622.276.1/.4.04.003          DOI: 10.30713/0207-2351-2020-1(613)-71-78

 

MATHEMATICAL MODELING WHEN ANALYZING ECONOMIC INDICATORS SENSITIVITY
OF AN OIL FIELDS DEVELOPMENT PROJECT (p. 71)

 

Vadim Valerievich Akhmetgareev, Cand. of tech. sci.,

Evgeny Vladimirovich Butusov

 

"TatNIPIneft" of PJSC "Tatneft"

32, M. Jalil str., Bugulma, 423233, Republic of Tatarstan, Russian Federation,

e-mail: post02@tatnipi.ru; ButusovEV@tatnipi.ru

 

Mariya Amurovna Yartieva

 

Moscow Institute of Physics and Technology

9, Institutsky per., Dolgoprudny, 141701, Moscow region, Russian Federation,

e-mail: Yartieva.ma@phystech.edu

 

The paper presents the results of the analysis of the relation between the oil sales price and the US dollar exchange rate as well as their effect on the basic indicators of the oilfield development project. A new approach to the analysis of the project indicators sensitivity to the change of the considered interrelated factors is proposed. The results of the proposed approach implementation both under the current tax legislation and in conditions of the tax "aneuver"completion involving the increase of mineral extraction tax are presented. The obtained results can be used in practical activity of project organizations and lecturers of corresponding faculties (taxation, general management, etc.).

The research used such methods as collection and statistical analysis of the information about oil sales prices and currency exchange rate, comparison and analogy as well as econometric methods (correlation-regression analysis, analysis of time series) that provided determination of the relationship between economic indicators.

The novelty of the research lies in the developed approach to conducting analysis of the basic indicators sensitivity of the oil field development project based on the use of the possible correlation relationship between the initial indicators – oil sales price and US dollar exchange rate, that allows for a more realistic forecast of the project risk tolerance.

 

Keywords: project of an oil field development; export oil sales price; sensitivity analysis; correlation relationship; regression model.

 

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