Oilfield Engineering

SOME SPECIFIC FEATURES OF DATA INTERPRETATION
OBTAINED DURING STUDYING NON-STATIONARY FILTRATION MODES
IN CONDITIONS OF A WEAKLY-CEMENTED COLLECTOR OF PK₁ FORMATION
OF NAKHODKINSKY DEPOSIT (p. 5)

Alexander Gennadievich Kozubovsky,

Alexander Dmitrievich Efimov,

Tatyana Valerievna Kuzmina,

Elena Sergeevna Vorobeva

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: KozubovskiiAG@tmn.lukoil.com; EfimovAD@tmn.lukoil.com; KuzminaTV@tmn.lukoil.com

The results of the data interpretation of the studies on non-stationary wells filtering modes of Nakhodkinsky field (formation PK₁) are considered. The specifics of the procedure of the initial data processing in conditions of faults either presence or absence are revealed. The necessity of using a formation composite model for wells located at a considerable distance from the identified graben boundaries is noted.

Keywords: collector; researches; pressure recovery curve (PRC); diagnostic plot of the pressure derivative; composite model of a formation.

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UDC 622.276.1/.4 DOI: 10.30713/0207-2351-2018-10-12-19

PROBABILITY APPROACH AS A TOOL OF DETECTING ZONES
OF OIL RESIDUAL RESERVES (p. 12)

Mikhail Alexeevich Kondratev,

Evgeny Sergeevich Azarov

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: KondratevMA@tmn.lukoil.com; AzarovES@tmn.lukoil.com

The method of identification of oil residual reserves zones, based on the probabilistic approach, is considered in the article, It allows to quickly assess the nature of oil reserves extraction without using laborious calculations on the hydrodynamic model. The algorithm used is universal and allows to obtain generalized probability maps of oil reserves availability for all deposits.

Keywords: probability; factor; correlation coefficient; the Cheddock scale; force of variables interrelation of; probability map; geological-hydrodynamic model; zoning map; geological reserves; recoverable reserves; residual recoverable reserves; labor costs; map of works.

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UDC 622.276.1/.4:622.276.53.054.23:621.67-83 DOI: 10.30713/0207-2351-2018-10-20-25

SHORT-TERM-PERIODIC WORK OF WELLS IN THE DEPOSITS
OF LLC "LUKOIL–WESTERN SIBERIA". EXPERIENCE OF IMPLEMENTATION
AND PROSPECTS OF DEVELOPMENT (p. 20)

Artur Fuatovich Abdullin,

Ilnur Kamilevich Abdulin,

Ekaterina Vyacheslavovna Sokolyanskaya,

Vitaly Viktorovich Yudchits

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: AbdullinAF@tmn.lukoil.com; AbdulinIK@tmn.lukoil.com; SokolyanskayaEV@tmn.lukoil.com, YudchitsVV@tmn.lukoil.com

The paper considers the principle of oil and gas production technology of wells’ short-term-periodic mode, equipped with electric centrifugal pumps. The experience of this technology implementation in the fields of LLC "LUKOIL−Western Siberia" is studied, its advantages and disadvantages are revealed and proposals for their solution are made. The feasibility of the technology further implementation with a feasibility study at the fields of LLC "LUKOIL−Western Siberia" is estimated.

Keywords: oil; short-term-periodic work; technology; energy efficiency; flow rate; operating life-time; electric centrifugal pump.

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UDC 622.276.43"5" DOI: 10.30713/0207-2351-2018-10-26-34

SOME SPECIFIC FEATURES
OF THE IMPACT OF GEOLOGICAL-TECHNICAL MEASURES
ON THE EFFICIENCY OF OIL RECOVERY ENHANCEMENT BY USING
A NON-STATIONARY (CYCLIC) WATER-FLOODING (p. 26)

Marat Rafailevich Dulkarnaev

"Povkhneftegaz" Territorial Production Department (TPD) of LLC "LUKOIL−Western Siberia"

19/17, Tsentralnaya str., Kogalym, 628483, Russian Federation,

e-mail: Marat.Dulkarnaev@lukoil.com

Natalia Pavlovna Zakharova,

Nikolay Alexandrovich Demyanenko, Cand. of tech. sci,

Evgeniy Nikolaevich Malshakov,

Yuliya Igorevna Ivanova

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: ZaharovaNP@tmn.lukoil.com; DemyanenkoNA@tmn.lukoil.com; MalshakovEN@tmn.lukoil.com; IvanovaYI@tmn.lukoil.com

The article discusses the fact that one and the same sites of the deposits are simultaneously subjected both to the use of non-stationary waterflooding (NSWF) and physical-chemical technologies and hydraulic fracturing of a formation (HFF), that are widely introduced for oil recovery enhancement. The influence of geological-technical measures (GTM), carried out and being carried out within the boundaries of the sites subjected to NSWF, on its effectiveness is considered. It is shown that when planning NSWF, it is necessary to account of the completed and planned measures on flow-diverting compositions injection, coverage of the wells fund to be subjected to NSWF HFF and other types of GTM as well as some specific features of the sites geological structure that are chosen for HSWF implementation.

Keywords: non-stationary water flooding; oil recovery enhancement; geological-technical measures; flow-diverting compositions; hydraulic fracturing of a formation; related interlayers; physical-chemical technologies.

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UDC 622.276.66.004.58 DOI: 10.30713/0207-2351-2018-10-35-42

EFFECT OF A WELL DRILLING AZIMUTH AND ANGLE ENTRY
INTO A FORMATION ON THE EFFICIENCY OF HYDRAULIC FRACTURING
OF A FORMATION ON THE EXAMPLE OF LATERAL WELLBORES
OF POVKHOVSKY FIELD BV₈ OBJECT OF "POVKHNEFTEGAZ"
TERRITORIAL PRODUCTION DEPARTMENT (TPD) (p. 35)

Alexander Valerievich Bukharov,

Timur Alfredovich Khakimov,

Nikolay Alexandrovich Demyanenko, Cand. of tech. sci.,

Anton Vladimirovich Rodionov

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: BuharovAV@tmn.lukoil.com; HakimovTA@tmn.lukoil.com; DemyanenkoNA@tmn.lukoil.com; RodionovAV@tmn.lukoil.com

The data of hydraulic fracturing of a formation (HFF) conducted in the sidetracks during drilling in BV₈ object of Povkhovsky field were analyzed. The regularities influencing HFF efficiency and the probability of complications during conducting of HFF hydraulic fracturing, depending on the azimuth of drilling and the zenith angle of the lateral wellbore inclination are revealed. Based on the results obtained, some recommendations were developed to minimize the risks of complications that may occur during HFF of fracturing and to increase the sidetracks productivity.

Keywords: sidetrack; zenith angle; azimuth angle; hydraulic fracturing of a formation; hard-to-recover residual reserves; complications in the process of a hydraulic fracturing; "STOP"; multi-stage hydraulic fracturing (MSHF); two-stage HFF; Povkhovsky field; regional stress.

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UDC 622.276.432:661.185 DOI: 10.30713/0207-2351-2018-10-43-50

ANALYSIS OF THE EFFICIENCY OF "SiXell" TECHNOLOGY AND
ITS ANALOGUES APPLICATION WITH THE AIM OF FORMATIONS’ OIL
RECOVERY ENHANCEMENT (p. 43)

Timur Erbolovich Bazhikov,

Alexey Vladimirovich Isaev,

Anton Mikhailovich Ignatiev,

Lyubov Vasilievna Popova

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

11, Tsentralnaya str., Kogalym, 628483, Russian Federation,

e-mail: BazhikovTE@tmn.lukoil.com; IsaevAV@tmn.lukoil.com; IgnatievAM@tmn.lukoil.com; PopovaLV@tmn.lukoil.com

Nikolay Alexandrovich Demyanenko, Cand. of tech. sci.

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: DemyanenkoNA@tmn.lukoil.com

The paper presents the results of experimental-industrial works and commercial introduction of the thermotropic "SiXell" technology at the fields of "Langepasneftegaz" Territorial Production department (TPD) of LLC "LUKOIL−Western Siberia". The efficiency of "SiXell" composition effect on the sites of YuV1 of Urievsky and Las-Yogan fields is evaluated and its comparison with the similar technologies efficiency, applied in commercial scale, is made.

Keywords: low-permeable reservoir; stabilizing the injectivity profile; the Jurassic strata; gelling; thermotropic composition; polymer; efficiency; oil saturated thickness; sandiness; density of residual mobile reserves; success.

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UDC 622.276.66.002.34 DOI: 10.30713/0207-2351-2018-10-51-57

POSSIBLE CAUSES OF LOW EFFICIENCY OF HYDRAULIC FRACTURING
OF A FORMATION DURING INFLOW INTENSIFICATION INTO RATHER
LOW-PERMEABLE COLLECTORS IN THE DEPOSITS
OF THE WESTERN SIBERIA (p. 51)

Evgeny Nikolaevich Malshakov,

Nikolay Alexandrovich Demyanenko, Cand of tech. sci.,

Valentina Ilinichna Shalamova,

Bogdan Igorevich Antsiferov,

Liliya Flyurovna Yakovenko

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: MalshakovEN@tmn.lukoil.com; DemyanenkoNA@tmn.lukoil.com; ShalamovaVI@tmn.lukoil.com; AntciferovBI@tmn.lukoil.com; YakovenkoLF@tmn.lukoil.com

The article considers the technological efficiency of hydraulic fracturing of a formation, performed in the wells the drilling of which was over and which opened Ach₆ deposit of Imilorsky field in conditions of rather low-permeable reservoirs. All the wells discussed above are characterized by intensive liquid and oil flow-rates decrease, high water-flooding of the produced products during their commissioning. It happens due to the very low permeability of the deposits’ reservoirs, which is on the verge of being a collector-non-collector and the active manifestation of capillary forces that lead to the blockade of the deposit pore medium by the aqueous phase of the working fluids used for the secondary opening of the formation and preparation of the fracturing fluid. The requirements for the working fluids formulations are made.

Keywords: well; low-permeable formation; collector; hydraulic fracturing of a formation (HFF); proppant; fracture fluid; capillary processes; gradient of pressure; hard-to-recover reserves (HRR); geological-physical characteristics.

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UDC 622.276.031.011.43:550.822.3 DOI: 10.30713/0207-2351-2018-10-58-62

STUDY OF CLAYISH CEMENT NATURE INTERACTION WITH THE LIQUID,
USED TO MAINTAIN A FORMATION PRESSURE (p. 58)

Viktoriya Alexandrovna Zholudeva, Cand. of geol.-mineral. sci.,

Vitaly Viktorovich Kolpakov,

Sergey Maratovich Yulyakshin,

Ildar Raushanovich Rakhmatullin, Cand. of phys.-math. sci.

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19/17, Tsentralnaya str., Kogalym, 628483, Russian Federation,

e-mail: ZholudevaVA@tmn.lukoil.com; KolpakovVV@tmn.lukoil.com; YulyakshinSM@tmn.lukoil.com; RahmatullinIR@tmn.lukoil.com

The nature of possible variants of rocks’ clayish cement interaction with the liquid, used to maintain of a formation pressure (liquid of MFP) is studied. Reslting from the integration of lithological and special core studies, it became possible to identify a relationship between the specific features of the clayish cement composition and the direction of permeability change when injecting MFP liquid.

Keywords: clayish minerals; MFP liquid; permeability; experimental model.

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UDC 622.276.43:678 DOI: 10.30713/0207-2351-2018-10-63-67

SELECTION OF A POLYMER BRAND
FOR A POLYMER FLOODING TECHNOLOGY (p. 63)

Anna Vitalievna Kladova,

Natalia Alexeevna Cherepanova, Cand of tech. sci.,

Elena Vasilievna Shamsutdinova

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19/17, Tsentralnaya str., Kogalym, 628483, Russian Federation,

e-mail: KladovaAV@tmn.lukoil.com; Cherepanova@nipi.ws.lukoil.com; ShamsutdinovaEV2@tmn.lukoil.com

The paper presents the results of laboratory studies of polymers of different chemical composition (polyacrylamide, copolymers containing sulfonated groups and chemically-bonded surface-active substances (SAS groups) and their release forms (granular powder, hydrocarbon suspension), that are proposed for use in polymer flooding technology that covers a wide range of synthetic polymers manufacturers. Based on the results of the research, conclusions on the reagents applicability were made and the use of an optimal polymer for carrying out experimental-industrial works was chosen.

Keywords: polymer flooding; Western Siberia; oil recovery enhancement; polyacrylamide; viscosity; physical-chemical methods of a formation stimulation.

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UDC 622.276+622.244.442.063+502.55:622.24 DOI: 10.30713/0207-2351-2018-10-68-71

TECHNICAL-TECHNOLOGICAL SOLUTIONS FOR HANDLING THE LIQUID PHASE
OF DRILLING WASTES IN THE WESTERN SIBERIA (p. 68)

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

Eduard Valerievich Babushkin, Cand. of tech. sci.,

Aliya Sergeevna Khalimova

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

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

Marina Germanovna Buyanova

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19/17, Tsentralnaya str., Kogalym, 628483, Russian Federation,

e-mail: BuyanovaMG@tmn.lukoil.com

V.P. Dubyaga, Cand. of chemistry sci.

CJSC "Vladipor" Scientific-Technical Center"

77, Bol'shaya Nizhegorodskaya str., Vladimir, 628483, Russian Federation,

e-mail: info@polymersintez.ru

Technical-technological solutions aimed at re-using of spent drilling fluids and drilling wastewater, the use of which will reduce the volume of drilling wastes at fields of the Western Siberia are considered.

Keywords: drilling waste; spent drilling mud; drilling wastewater; laboratory researches; re-use.

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UDC 622.276.63 DOI: 10.30713/0207-2351-2018-10-72-76

CHOICE OF THE OPTIMAL ACID COMPOUND FOR THE ZEOLYT-CONTAINING ROCKS
OF PYAKYAKHINSKY FIELD (p. 72)

Aygul Ruslanovna Khalikova,

Natalia Alexeevna Cherepanova, Cand. of tech. sci.

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19/17, Tsentralnaya str., Kogalym, 628483, Russian Federation,

e-mail: HalikovaAR@tmn.lukoil.com; Cherepanova@tmn.lukoil.com

The article presents the results of laboratory studies of acid compositions samples of various trade brands and manufacturers. Based on the results of the studies, conclusions were drawn regarding the possibility of using the presented acid compositions on zeolite-bearing rocks of Pyakyakhinsky field.

Keywords: Pyakyakhinsky field; zeolites; acid treatment; asphalt-resin-paraffin deposits; organic acids; polar and nonpolar solvents.

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