Oilfield Engineering

AN OPTIMAL SCENARIO APPROACH TO OIL PRODUCTION INCREASE IN MATURE FIELDS
CONSIDERING THE ACTUAL PRODUCING CAPACITY OF THE SURFACE INFRASTRUCTURE (p. 5)

Vladimir Nikolaevich Kozhin, Cand. of tech. sci.,

Tatyana Petrovna Chaplygina,

Vladimir Valerievich Pogodin,

Dmitriy Sergeevich Lipanin

SamaraNIPIneft LLC

Samara, Russian Federation,

e-mail: KozhinVN@samnipi.rosneft.ru, chaplyginatp@samnipineft.ru

The article considers the problem of substantiating the optimal scenario for the development of mature fields, taking into account the infrastructure loading. The authors of the paper have proposed an algorithm for finding the optimal option of carrying out a program of geological-technical measures, including preliminary calculations of the actual productivity of the infrastructure. The proposed approach makes it possible to determine the most effective scenario for the development of a mature oil and gas asset.

Keywords: mature asset; efficiency increase; production increase; infrastructure reconstruction; calculation of a pipeline flow capacity.

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UDC 622.76.56 DOI: 10.33285/0207-2351-2021-8(632)-10-12

EXPERIENCE OF APPLYING THE ANALYSIS OF THE LIGHT ABSORPTION COEFFICIENT
AND MICROCOMPONENT COMPOSITION OF OIL WHEN SOLVING THE PROBLEMS
OF PRODUCTION SEPARATION IN WELLS FROM SEVERAL RESERVOIRS (p. 10)

Pavel Aleksandrovich Lyutoev

LUKOIL–Komi LLC

Usinsk, Komi Republic, Russian Federation

e-mail: Pavel.Lyutoev@lukoil.com

Alexander Vladimirovich Shilov,

Sergey Evgenievich Nikulin,

Alexander Andreevich Protopopov

LUKOIL–Engineering Limited PermNIPIneft Branch Office in Perm

Perm, Russian Federation,

e-mail: Aleksandr.Shilov@pnn.lukoil.com, Sergej.Nikulin@pnn.lukoil.com, Aleksandr.Protopopov@pnn.lukoil.com

For the separation of oil production in wells operating jointly several layers, for assessing the rate of reserves development and planning geological and technical measures, it is proposed to use the analysis of the light absorption coefficient and the micro-component composition. The method allows distribution of oil between layers based on the analysis of surface samples using data from wells developing one layer (wells of the reference fund).

This technology has shown its effectiveness in the development of heavy oil fields, where it is difficult to implement oil separation by pumping equipment.

Keywords: colorimetric properties of oil; light absorption coefficient; microcomponent analysis; separation of production by layers; during joint development reservoirs; heavy oil.

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UDC 622.276.43:678 DOI: 10.33285/0207-2351-2021-8(632)-13-15

REGULATION OF POTENTIAL MOBILE OIL RESERVES BY TOTAL WITHDRAWAL DUE
TO THE APPLICATION OF POLYMER FLOODING (p. 13)

Ainur Akhatovich Rakhmatullin,

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

LLC NPO "Neftegaztekhnologiya"

Ufa, Republic of Bashkortostan, Russian Federation,

e-mail: npongt@gmail.com

The article provides an analysis of the results of polymer flooding at a specific oil field in the Republic of Tatarstan. Measures were taken to introduce this technology with the supply of polymer solutions in the form of rims with concentrations of 0,04 and 0,07 %. The coverage control was carried out by pumping the displacing fluid in the volume of 2,5 Vpor, thus providing intensification of the residual oil displacement.

Keywords: coverage ratio; polymer flooding; physical-chemical cyclic impact on the formation.

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UDC 622.276.031.011.43:51 DOI: 10.33285/0207-2351-2021-8(632)-16-21

SUBSTANTIATION OF METHODS OF INVESTIGATION OF DEEP SAMPLES OF OIL
FROM DEPOSITS WITH GAS CAP BY EXAMPLE OF PYAKYAKHINSKY DEPOSIT (p. 16)

Vladimir Nikolaevich Moroz,

Olga Sergeevna Krasnyashchikh,

Azat Mustafovich Mulyukov

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

Kogalym, Russian Federation,

e-mail: MorozVN@tmn.lukoil.com, KrasnyaschihOS@tmn.lukoil.com, MulyukovAM@tmn.lukoil.com

Sergey Aleksandrovich Leontiev, Dr. of tech. sci., Professor,

Oleg Valentinovich Fominykh, Dr. of tech. sci.

Industrial University of Tyumen

Tyumen, Russian Federation,

e-mail: leontevsa@tyuiu.ru, fominyhov@tyuiu.ru

Daniil Aleksandrovich Strelnikov

LLC "LUKOIL−Western Siberia"

Kogalym, Russian Federation,

e-mail: Daniil.Strelnikov@lukoil.com

The practical and theoretical methods of restoration of reservoir oil initial properties from deposits with a gas cap of Pyakyakhinsky deposit are considered. The practical method consists of laboratory recombination of oil deep sample with equilibrium gas in a PVT cell. The theoretical method is based on adjusting the state equation apparatus to the results of deep samples studies and carrying out calculations before saturation of oil with equilibrium gas. Initial reservoir oil parameters obtained by different methods have high convergence, which indicates their reliability. Any method makes it possible to obtain correct information about initial properties of reservoir oil from fields with gas cap for further use when calculating hydrocarbon reserves and designing deposits development.

Keywords: oil deep sample; gas cap; PVT-properties; saturation pressure; equilibrium gas; equation of state; PVT-model.

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UDC 622.276.53 DOI: 10.33285/0207-2351-2021-8(632)-22-26

ASSESSMENT OF THE CHARACTERISTICS OF THE GAS-LIQUID COMPOSITION
IN DOWNHOLE CONDITIONS BY THE MATERIAL BALANCE METHOD (p. 22)

Ildar Zafirovich Denislamov, Cand. of tech. sci.

Elina Sergeevna Samushkova

Timur Rifovich Ziyazetdinov

Djamil′ Rustemovich Khakimov,

Anastasiya Andreevna Suslova

Ufa State Petroleum Technological University

Ufa, Russian Federation,

e-mail: denislamoviz@mail.ru, elinkasamushkova@mail.ru, ziyazetdinov.timur@gmail.ru, suslova-nastyusha@list.ru

In terms of design and operation, oil producing well can be compared to an automatic group metering unit of an oil gathering system. In both devices, part of the associated petroleum gas is separated from the reservoir oil for a certain period of time and is then returned to the gas-liquid flow. In the oil processing facilities, the material balance method, expressed in the form of molar concentrations of oil and gas components, is successfully used to calculate the characteristics of multistage oil and gas separation. The authors of the paper propose to use this method for calculating the separation of associated petroleum gas in the well annulus and tubing.

The influence of oil homogenization in the annular space of the well on the efficiency of gas separation from oil has been determined. Calculations of pressures at the pump suction and above it are performed in the iteration mode by successive approximation to the constant values of the sought parameters.

Keywords: annulus; separation; pressure; temperature; component composition; oil mass; gas phase; fluid level.

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UDC 622.245.422.4:66.022.3 DOI: 10.33285/0207-2351-2021-8(632)-27-29

FIXING TECHNOLOGY OF A BOTTOM-HOLE ZONE IN SAND-PRODUCING WELLS (p. 27)

Elman Eyvaz ogly Bayramov

SOCAR

Baku, Azerbaijan Republic,

e-mail: elman.bayramov.70@mail.ru

The article is devoted to increasing the turnaround maintenance time of sand-producing wells based on the development of effective technology for fixing the bottom-hole zone. Efficiency increase of the bottom-hole zone fastening should be achieved by creating a grouting barrier in the bottom-hole zone. One of such methods is restoration of the cement stone strength when cementing wells bottom-hole zones.

Experiments were carried out in laboratory conditions to improve the method of fixing the bottom-hole rocks. It has been revealed that the use of ferro-particles, makes it possible to regulate the rheological parameters of the cement slurry and increase the strength of the cement stone to prevent the mechanical and filtration destruction.

Keywords: sand manifestation; bottom-hole zone; cement slurry; ferro-particles – magnetite; strength; structural viscosity; shear stress.

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UDC 622.276.054.23:621.671:004.896 DOI: 10.33285/0207-2351-2021-8(632)-30-36

ELECTRIC SUBMERSIBLE PUMP OPERATION MODE OPTIMIZATION
TO INCREASE THE RUN-TO-FAILURE TIME (p. 30)

Arturas Rimo Shabonas

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: shabonas.ar@gubkin.ru

Electric submersible pump (ESP) are widely used for oil production in Russia and worldwide. ESP failure requires costly repairs and leads to well downtime, while the technical limit of ESP technology is higher than current mean time between failures (MTBF).

This work uses machine learning methods to create the model of ESP systems failure prediction. Today the industry knows that such models are necessary for solving logistical management tasks of routine maintenance team movement and stocking required number of ESP equipment for future repairs, which will minimize well downtime and, thus, maximize production.

This paper describes a new approach to the application of the ESP failure prediction model created by machine learning methods to select the optimal ESP unit operation mode. Calculation results analysis shows that the approach studied in this work can be used for targeted ESP operation modes optimization in order to increase their MTBF.

Keywords: electric submersible pump (ESP); ESP failure prediction; ESP predictive analytics; ESP predictive maintenance; ESP operation mode optimization; ESP operation mode sensitivity analysis.

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UDC 622.276.53:65.011.4 DOI: 10.33285/0207-2351-2021-8(632)-37-42

EVALUATION OF THE WELL PRODUCT WATER CUT DETERMINATION METHOD
BY THE BEHAVIOR OF ELECTRIC CENTRIFUGAL PUMP (ESP) MOTOR LOADING
DURING ESP OPERATION IN A SHORT-TIME PERIODICAL MODE (p. 37)

Anton Sergeevich Vidineev

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: a.c.vidineev@mail.ru

Performed the of the accuracy of the well water cut determination method by the behavior of ESP motor current load during ESP operation in a short-time periodical mode is evaluated. It was shown that, under certain conditions, the described method makes it possible to determine the current water cut of the well with an accuracy of up to 10 % without conducting a laboratory study of the sample. Recommendations on the method applicability limits are given, as well as its advantages and potential opportunities of field application are shown.

Keywords: electric centrifugal pump (ESP); low flow rate wells; periodical short-term mode; water cut determination; ESP motor load; gravitational separation.

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UDC 622.276:502.3 DOI: 10.33285/0207-2351-2021-8(632)-43-49

ESTIMATION OF THE UTILIZATION POTENTIAL OF CARBON DIOXIDE
AT ORENBURG REGION OIL FIELDS (p. 43)

Vladimir Nikolaevich Kozhin, Cand. of tech. sci.,

Viktor Viktorovich Konovalov, Cand. of chemical sci.,

Alexey Sergeevich Guba,

Sergey Vladimirovich Bodogovskiy,

Mikhail Zalmanovich Kravets, Cand. of tech. sci.,

Oleg Olegovich Dyadechko

SamaraNIPIneft LLC

Samara, Russian Federation,

e-mail: KozhinVN@samnipi.rosneft.ru, konovalovvv@samnipi.rosneft.ru,

The paper presents information about the main trends of CCS/CCUS technologies (capture, transport and storage/ development of use of carbon dioxide). The sources of the carbon dioxide emissions were analyzed for the main facilities of oil field treatment of JSC "Orenburgneft" and the dynamics of their change in the short term is presented. The possibility of localizing (combining) sources of carbon dioxide emissions is shown and recommendations for choosing a method for capturing carbon dioxide are presented. Estimated calculations of carbon dioxide utilization potential at the oil fields of Orenburg region have been carried out.

Keywords: carbon dioxide; utilization; oil fields of Orenburg region; sources of emissions; methods of capturing carbon dioxide; enhancement of oil recovery; technologies cost.

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UDC 622.692.4.004.55 DOI: 10.33285/0207-2351-2021-8(632)-50-57

ABOUT THE POSSIBILITY OF IMPLEMENTING THE TECHNOLOGY OF "CONTROLLED LAYER"
OF ASPHALT-RESIN-PARAFFIN DEPOSITS (p. 50)

Pavel Yurievich Ilyushin, Cand. of tech. sci.

Kirill Andreevich Vyatkin

Anton Vadimovich Kozlov

Alena Olegovna Votinova

Perm National Research Polytechnic University

Perm, Russian Federation,

e-mail: ilushin-pavel@yandex.ru, kirill.vyatkin@girngm.ru, anton.kozlov@girngm.ru, votinova_alena@mail.ru.

The relevance of the study is caused by the need of developing new methods to be applied for eliminating organic deposits, the formation of which is one of the most serious problems when producing and transporting paraffin oil in the Perm region. Prevention of these deposits formation will reduce the cost of pipelines maintenance and repair, as well as increase the oilfield equipment operational life-time.

Modeling and feasibility study of the "controlled layer" technology implementation are carried out as well as a mathematical model of the organic deposits required thickness on the inner surface of the targeted oil pipeline is developed.

The results of laboratory studies on the "Cold Rod" installation, assessment of the thermal conductivity of organic deposits, a feasibility study for the implementation of the technology under consideration, including the economic calculation, modeling of the effect of organic deposits formation on the operational parameters of an oil pipeline are presented.

Laboratory studies have made it possible to determine the kinetic parameters of organic deposits formation and their thermal insulation properties. The simulation of the organic deposits formation performed in the hydrodynamic simulator "Engineering Simulator" showed that this technology application is technologically efficient and does not lead to a significant excess of pressure at the entrance to the pipeline under consideration. The technology economic substantiation has proved its significant capital costs, but the low operating costs of this technology make it more economically feasible than carrying out flushing of the targeted oil pipeline. The authors of the paper also presented a mathematical model for calculating the required thickness of organic deposits to assess the rational implementation of the technology in question on linear oil pipelines.

Keywords: mathematical model; asphalt-resin-paraffin deposits; simulation; controlled layer; conductivity.

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NATIONAL UNIVERSITY OF OIL AND GAS "GUBKIN UNIVERSITY"

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