ISSN 0207-2351

Scientific-technical journal

OILFIELD ENGINEERING

                                                                                                          published since 1965

July 2017                                                 ¹ 7                                   12 issues per year

 

CONTENÒS

 

DEVELOPMENT OF OIL AND GAS-OIL FIELDS

 

Vladimirov I.V., Bakirov I.I., Loshcheva Z.A., Khisamutdinov N.I. Placement of production and injection wells in oil deposits with expanded zones of a collector decompactification (p. 5-9)

 

Kryukov M.A., Lesnoy A.N., Maganov D.R., Chernobrovin E.V., Nekrasov A.V., Gritzay I.A., Polukeev D.I. Development of a deposits evaluation methodology to implement the approach of integrated modeling in PJSC "LUKOIL" (p. 9-13)

 

Skobeev A.V., Kryukov M.A., Lesnoy A.N., Maganov D.R., Nekrasov A.V., Khismatullina F.S. Experience of an integrated model development on the example of offshore deposits of the middle Caspian sea (p. 13-20)

 

Cherevko S.A., Yanin K.E. First results of horizontal wells operation with multi-stage hydraulic fracturing in bazhenovsko-abalaksky complex of Palyanovskaya area (p. 20-28)

 

Bakhtiy N.S., Khodanovich D.A. Application of numerical hydrodynamic modeling to estimate the operational reserves of underground water (p. 28-31)

 

METHODS OF PRODUCING EFFECT ON A DEPOSIT AND RAISING OIL RECOVERY

 

Abdullayev M.G. One more method of heavy oil extraction from a formation (p. 31-34)

 

Mamalov E.N. Determination of the critical thickness of an impermeable interlayer between productive strata of different permeability which provides possible thermal interference between the layers (p. 35-38)

 

TECHNIQUE AND TECHNOLOGY OF OIL PRODUCTION

 

Melnichenko V.E. Prediction of mechanical impurities withdrawal out of a formation when operating an artificial fund of wells (p. 38-42)

 

PREVENTION OF PARAFFIN SEDIMENTATION, SALTS AND HIDRATES

 

Soboleva E.V., Soboleva T.I. Salts sedimentation on intra-well equipment: causes of their occurrence and methods of their elimination (p. 42-47)

 

GATHERING, TRANSPORTATION AND PREPARATION OF OIL, GAS AND WATER

 

Syur T.A., Zakshevskaya L.V., Sharova G.A., Durbazhev A.Yu., Anuchin L.I. The results of the pilot-field testing of water treatment technology at the fields of LLC "LUKOIL−PERM" (p. 47-50)

 

Marchenko V.V., Muzipov Kh.N. Some aspects in relation to oil preparation (p. 50-53)

 

CORROSION AND ENVIRONMENT PRESERVATION

 

Sukhoverkhov S.V., Brikov A.V., Zadorozhny P.A., Denisov P.Yu., Markin A.N. Modern approach to laboratory tests and quality control of corrosion inhibitors (p. 54-57)

 

Information on the articles (p. 58-64)

 

 

Information on the articles

 

UDC 622.276.1/.4:622.276.346

 

PLACEMENT OF PRODUCTION AND INJECTION WELLS IN OIL DEPOSITS
WITH EXPANDED ZONES OF A COLLECTOR DECOMPACTIFICATION (p. 5)

 

I.V. Vladimirov

 

Ufa State Petroleum Technical University

1, Kosmonavtov str., 450062, Ufa, Republic of Bashkortostan, Russian Federation

 

I.I. Bakirov, Z.A. Loshcheva

 

IC, PJSC "Tatneft"

75, Lenin str., 423450, Almetyevsk, Republic of Tatarstan, Russian Federation,

tel.: (855) 330-71-23,

fax: (855) 330-79-14,

e-mail: urnin@tatneft.ru

 

N.I. Khisamutdinov

 

LLC NPO "Neftegaztekhnologia"

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

tel.: (347) 228-18-75,

e-mail: npo@ngt.ru

 

The article deals with the problems in relation to the placement of production and injection wells in a reservoir with the extended decompactification areas (faults) in high-viscous oil deposits of. The following results were obtained. It is fixed that when placing series of wells perpendicularly to the fault lines (the first variant), a higher oil recover factor ORF is possible in comparison with the placement of the series of wells parallelly to the fault lines (second variant), by regulating water injection and discharge pressure. In the second variant discharge pressure increase allows increasing the oil withdrawals, but leads to faster water-flooding of the wells and a slight decrease of ORF.

 

Keywords: production wells; injection wells; collectors decompactification; fault lines; high-viscous oil.

 

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UDC 622.276.1/.4

 

DEVELOPMENT OF A DEPOSITS EVALUATION METHODOLOGY
TO IMPLEMENT THE APPROACH OF INTEGRATED MODELING
IN PJSC "LUKOIL" (p. 9)

 

Mikhail Alexandrovich Kryukov,

Alexander Nikolaevich Lesnoy,

Danis Ravilevich Maganov,

Evgeny Viktorovich Chernobrovin,

Artem Vladimirovich Nekrasov,

Ivan Alexandrovich Gritzay,

Dmitry Ivanovich Polukeev

 

LLC "LUKOIL–Engineering"

3, bld. 1, Pokrovsky boulevard, 127055, Moscow, Russian Federation,

tel.: (495) 983-22-86, (495) 620-21-06,

fax: (495) 983-21-41,

e-mail: LUKOIL-Engin@lukoil.com

 

The article outlines the main principles of fields evaluation to implement the "Integrated Modeling" process in PJSC "LUKOIL" in view of designing, supporting the development and optimization of oil and gas production. They include the following: systematization of the accumulated knowledge about the object of modeling and the formation of the concept of the most suitable deposits selecting; algorithmization of solutions to select the models’ components; identification of the criteria and uncertainty levels to assess the risk when selecting the fields-candidates; calculation of parameters that ensure the accounting of the most significant criteria that influence decision-making.

The subject of the recommendations are the assets and components of the fields models that describe the formation, well, the system of land and offshore infrastructure.

 

Keywords: intellectual deposit; integrated modeling; matrix; passport of the investment project; hydrodynamic model.

 

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UDC 622.276.1/.4.04

 

EXPERIENCE OF AN INTEGRATED MODEL DEVELOPMENT
ON THE EXAMPLE OF OFFSHORE DEPOSITS
OF THE MIDDLE CASPIAN SEA (p. 13)

 

A.V. Skobeev, M.A. Kryukov, A.N. Lesnoy, D.R. Maganov, A.V. Nekrasov, F.S. Khismatullina

 

LLC "LUKOIL−Engineering"

3, bld.1, Pokrovsky boulevard, 127055, Moscow, Russian Federation,

tel.: (495) 983-22-86, (495) 620-21-06,

fax: (495) 983-21-41,

e-mail: LUKOIL-Engin@lukoil.com

 

The article considers one of the most topical approaches to a field development – an integrated model application when designing and monitoring fields development, geological-technical measures planning. The integrated model can be used both to accelerate the adoption of operational decision-making, to optimize the production process and to perform medium-term and long-term calculations.

The article also discusses the problems of the optimal software selection for the integrated modeling and development of Yu. Korchagin field’s full-scale model consisting of a formation, wells, ground infrastructure.

 

Keywords: integrated modeling; hydrodynamic model; production wells; injection wells.

 

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UDC 622.276.66 ÑÌ

 

FIRST RESULTS OF HORIZONTAL WELLS OPERATION WITH MULTI-STAGE
HYDRAULIC FRACTURING IN BAZHENOVSKO-ABALAKSKY COMPLEX
OF PALYANOVSKAYA AREA (p. 20)

 

S.A. Cherevko

 

LLC "Gazpromneft–Khantos"

56, Lenin str., 628011, Khanty-Mansiysk, HmAO – Yugra, Russian Federation,

e-mail: Cherevko.SA@hantos.gazprom-neft.ru

 

K.E. Yanin

 

LLC "Term "Project Office"

15, Dzerzhinsky str., 625000, Tyumen, Russian Federation,

tel.: (345) 263-15-64,

fax: (345) 263-15-48,

e-mail: term@term-pb.ru

 

The article considers the effectiveness of Bazhenovsko-Abalaksky complex development within the north-eastern part of Palyanovskaya area of the Krasnoleninsky field with extended horizontal wells with multi-stage hydraulic fracturing of the formation. The comparison of technological indicators of operation of horizontal and directional wells drilled in a low permeable object is given. Prospects of using horizontal wells (HW) technology with a multi-stage hydraulic fracturing of a formation (MSHFF) when developing non-traditional reservoirs is outlined.

 

Keywords: Bazhenovsko-Abalaksky complex; horizontal wells; multi-stage hydraulic fracturing of a formation; low-permeable collector; hard-to-recover oil reserves; well production rate.

 

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UDC 553.98(571.1):556.3

 

APPLICATION OF NUMERICAL HYDRODYNAMIC MODELING TO ESTIMATE
THE OPERATIONAL RESERVES OF UNDERGROUND WATER (p. 28)

 

N.S. Bakhtiy, D.A. Khodanovich

 

"SurgutNIPIneft", Tyumen branch of JSC "Surgutneftegaz"

12, Rosa Luxemburg str., 625003, Tyumen, Russian Federation,

tel.: (345) 225-02-40,

e-mail: khodanovich_da@mail.ru

 

The active use of the Aptian-Cenomanian mineralized waters in reservoir pressure maintenance systems in the Western Siberia fields is caused both by their extraction simplicity and by a similar chemical composition with the formation water in the oil-bearing intervals. The subsoil user periodically reassesses the groundwater resources, which is often associated with an increase in the mineralized water demand by the systems of formation pressure maintenance. As a rule, Toeys' formula is used to assess the water levels lowering in water wells. This formula uses many assumptions and does not always provide the required accuracy. Therefore, in 2015, the State Reserves Commission (SRC) put forward recommendations on the use of numerical hydrodynamic modeling when calculating the groundwater resources, as well as on the need to take into account the load gradual increase on the water supply sites. In this regard, the article suggests a methodical approach to modeling of groundwater operation using a software for hydrodynamic modeling. "Techscheme", the corporate hydrodynamic simulator ("SurgutNIPIneft", Tyumen branch of JSC "Surgutneftegaz") was used as such software.

 

Keywords: system of a formation pressure maintenance; hydrodynamic simulator; hydrodynamic modeling.

 

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UDC 622.276.654

 

ONE MORE METHOD OF HEAVY OIL EXTRACTION FROM A FORMATION (p. 31)

 

Malik Gurban Abdullayev

 

Azerbaijan State University of Oil and Industry

20, Azadlyg prosp., AZ1010, Baku, Republic of Azerbaijan,

e-mail: malik.abdullayev.52@mail.ru

 

The article considers the problem in relation to development of a method of heavy oil displacement from a formation, providing oil viscosity reduction and oil recovery enhancement. The essence of the proposed work lies in the fact that the method of heavy oil displacement from a reservoir includes an oxidant injection through the injection well, followed by the water-flooding, herewith, 10 % mixture of aqueous solution of potassium or sodium dichromate and additionally 0,1…0,9 m3 per 1 m3 of turpentine are injected in the well as an oxidant, so the total amount of the injected agents should be no more than 0,1 of the formation porous volume. The proposed heat carrier is a novelty. The expected economic efficiency compared to the prior well-known methods consists of several sources, such as up to 5 % enhanced oil recovery, 5…6 times less the cost of reagents, improved inhibitory properties of the proposed compositions as well as the ecological feasibility of the new reagents application. Oil production intensification and enhancement of oil recovery out of formations when injecting heat carrier is achieved by oil viscosity reducing, thermal expansion of the formation oil and the formation skeletons as well as the intensification of capillary impregnation (for hydrophilic formations). As a result, oil mobility and its phase permeability and the formation coverage by the displacing agent increase, thus creating conditions for oil displacement from low-permeable rock pillars due to the anti-capillary impregnation.

 

Keywords: composition; formation; turpentine; sodium dichromate; potassium dichromate; heat carrier; heavy oil; viscosity; oxidant; oil recovery; chemical reaction.

 

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UDC 622.276.654

 

DETERMINATION OF THE CRITICAL THICKNESS
OF AN IMPERMEABLE INTERLAYER BETWEEN PRODUCTIVE STRATA
OF DIFFERENT PERMEABILITY WHICH PROVIDES POSSIBLE THERMAL
INTERFERENCE BETWEEN THE LAYERS (p. 35)

 

Evgeny Nikolaevich Mamalov

 

Institute of Geology and Geophysics, NAS of Azerbaijan

119, G. Javid prosp., AZ1143, Baku, Republic of Azerbaijan,

e-mail: evgeniy_mamalov@rambler.ru

 

The purpose of this article is to determine the thermal interaction intensity between the productive layers of different permeability, separated by a hydrodynamically impermeable interlayer, when carrying out wet interlayer combustion in them. The intensity of the thermal interaction between the productive layers determines the efficiency of the combustion process in the layers of different permeability. In addition, the calculation of the thermal intensity between the layers makes it possible to determine the maximum thickness of the impermeable interlayer, when the thermal effect of one productive layer on the another one is still possible.

 

Keywords: layered-heterogeneous beds; productive strata; permeability; thickness; thermal interference; wet in-situ combustion; heat losses.

 

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UDC 622.276.53.054.23

 

PREDICTION OF MECHANICAL IMPURITIES WITHDRAWAL OUT OF A FORMATION
WHEN OPERATING AN ARTIFICIAL FUND OF WELLS (p. 38)

 

Victor Evgenievich Melnichenko

 

The Expert Council for the mechanized oil production in Russia

e-mail: MelnichenkoVE@yandex.ru

 

The article considers the problem, important for the oil industry, of methodological approaches development to predict mechanical impurities withdrawal out of a formation. Sand production is one of the main problems when operating artificial lift wells. Mechanical impurities entering the pump, cause premature failures due to the pump stuck, reduction and stop of the pump flow as a result of clogging. The abrasive wear-out of the pumps friction surfaces often occurs, leading to the premature failures. The article proposes a mathematical model to predict the removal of mechanical impurities from the formation, consisting of three stages: destruction of the formation, sand withdrawal due to the formation fluids flow and sand lifting to the surface. Given the physical representation of the considered processes and corresponding mathematical solutions for all the stages are given. A comparison of the actual data of the mechanical impurities withdrawal with the calculated data demonstrated the adequacy of the proposed mathematical model. The article presents the results of calculations of the effect of the formation pressure value on wells sand production. It is shown that the formation pressure decrease from the initial levels brings increase in the intensity of mechanical impurities withdrawal out of the formation, thus complicating the operation of artificial lift wells.

 

Keywords: artificial lift wells; mechanical impurities withdrawal (sand production); equipment failures; equipment reliability; mean time to failure; mean time before repair; formation pressure.

 

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UDC 622.276.72

 

SALTS SEDIMENTATION ON INTRA-WELL EQUIPMENT:
CAUSES OF THEIR OCCURRENCE AND METHODS OF THEIR ELIMINATION (p. 42)

 

Elizaveta Viktorovna Soboleva

 

LLC "LUKOIL−PERM"

62, Lenin str., 614990, Perm, Russian Federation,

e-mail: Lizi.89@inbox.ru

 

Tatiana Ivanovna Soboleva

 

"PermNIPIneft", a branch of LLC "LUKOIL−Engineering" in the city of Perm

29, Sovetskaya Armiya str., 614066, Perm, Russian Federation,

e-mail: ti_soboleva@inbox.ru

 

The mechanism of the main processes causing salt sedimentation on the oilfield equipment surface is considered in the article. The causes of salt sedimentation characteristic of the Upper Kama region fields are studied. The structure of the abnormal well fund is analyzed. The advantages and disadvantages of the existing technologies of salt sedimentation protection are analyzed. A technology of wells treatment by a hydrochloric acid solution to remove salts is proposed.

 

Keywords: salt; bottom-hole pumping equipment; abnormal well fund; operational time before failure; hydrochloric acid treatment.

 

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UDC 622.276.438:628.16.065

 

THE RESULTS OF THE PILOT-FIELD TESTING
OF WATER TREATMENT TECHNOLOGY AT THE FIELDS
OF LLC "LUKOIL−PERM" (p. 47)

 

Tatiana Anatolievna Syur,

Lyudmila Vasilievna Zakshevskaya,

Galina Anatolievna Sharova

 

"PermNIPIneft", a branch of LLC "Lukoil−Engineering" in the city of Perm

29, Sovetskaya Armiya str., 614066, Perm, Russian Federation,

e-mail: permnipineft@pnn.lukoil.com

 

Aleksey Yurievich Durbazhev

 

LLC "LUKOIL−PERM"

62, Lenin str., 614990, Perm, Russian Federation,

e-mail: lp@lp.lukoil.com

 

Lev Ivanovich Anuchin

 

LLC "New Technologies and Solutions"

7/3, 1 Luchevoy prosek, 107113, Moscow, Russian Federation,

e-mail: inovts@gmail.com

 

The article presents the results of pilot-field testing of water treatment technology in SRK apparatuses, manufactured by LLC "New Technologies and Solutions" at three fields of LLC "LUKOIL−PERM". This apparatus is a centrifugal rotary-type device, in which the dispersed phase sedimentation (oil and solid particles) is realized by the combination method – coalescence and centrifugation, providing the synergetic effect of complex and stable disperse systems separation in a small-sized apparatus with minimal energy consumption and without chemical reagents use. The quality of the water purified in SRK apparatus corresponds to the standards. The test results, based on the generalized experience, make it possible to consider the technology as one of the advanced technologies of water treatment by using plants of preliminary water discharge and oil preparation.

 

Keywords: methods of enhanced oil recovery (EOR); pure water injection; water treatment technology; coalescence; centrifugation.

 

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UDC 622.276.8

 

SOME ASPECTS IN RELATION TO OIL PREPARATION (p. 50)

 

V.V. Marchenko, Kh.N. Muzipov

 

Tyumen Industrial University

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

e-mail: halim46@mail.ru

 

The article presents typical schemes of oil preparation, horizontal and vertical separators. Formulas for calculating the rates of liquid and gas flows through the separators and formulas for determining the separators dimensions are given. The principle of operation of the electrostatic coagulator is described. The reasons for naphthenates sedimentation and their influence on oil equipment are described.

 

Keywords: separator; oil; gas; paraffin; density; viscosity; naphthenate; anti-foam agent; emulsion; scrubber.

 

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UDC 620.197.3:622.692.12

 

MODERN APPROACH TO LABORATORY TESTS AND QUALITY CONTROL
OF CORROSION INHIBITORS (p. 54)

 

Svyatoslav Valerievich Sukhoverkhov,

Pavel Anatolevich Zadorozhny,

Andrey Nikolaevich Markin

 

Institute of Chemistry, FEB RAS

159, 100-letiya Vladivostok prosp., 690022, Vladivostok, Russian Federation,

e-mail: svs28@ich.dvo.ru, zadorozhny@rambler.ru, Andrey.N.Markine@gmail.com

 

Alexander Valerievich Brikov

 

Nefteyugansk branch of "Salym Petroleum Development N.V." in the city of Tumen

65, Respublika str., 625000, Tyumen, Russian Federation,

e-mail: A.Brikov@salympetroleum.ru

 

Pavel Yurevich Denisov

 

PAO "Giprotumenneftegaz"

62, Respublika str., 625000, Tyumen, Russian Federation,

e-mail: denisov@gtng.ru

 

The basic type of corrosive damages of oil gathering pipelines is local corrosion like pits and cracks. To reduce the corrosion rate, corrosion inhibitors (CI) are widely applied. Selection of CI is based on the laboratory tests. It is shown that if the protective effect relative to the corrosion "common" (average-surface) rates is high, some CI do not provide the effective protection of local corrosion and can even promote it. It is recommended to include the protective effect assessment of local corrosion into the standards of CI standard test methods. The methods currently applied for CI quality control are not effective for determination of the substances (active base) of the reagent concentration. It is shown that modern chemical analysis methods allow to determine the exact substance and its concentration in CI formulation.

 

Keywords: corrosion inhibitors (CI); CI quality control (chemical analysis); CI protective efficiency assessment; CI active base (quality control).

 

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