ISSN 2413-5011

Scientific-technical journal

GEOLOGY, GEOPHYSICS

AND DEVELOPMENT OF OIL AND GAS FIELDS

                                                                                                       published since 1992

September 2020                           ¹ 9(345)                       12 issues per year

 

CONTENÒS

 

OIL AND GAS PROSPECTING

 

Grishkevich V.F., Kasatkin V.E., Lagutina S.V., Dolmatova S.S., Panina E.V., Smolyakov G.A., Sivkova A.V., Shaikhutdinova G.Kh., Laptey A.G. Evolution of sediments and fluid-conducting system of the bazhenovskaya formation (p. 4‑19)

 

Shvetsova E.A., Mukhlygina E.V. Possibilities of forecasting oil and gas potentials in the pre-jurassic sediments of the Shaim oil- and gas-bearing region of the Western Siberia (p. 20‑30)

 

Panina E.V., Laminsky D.A., Grishkevich V.F., Moskalenko N.Yu., Lagutina S.V., Kasatkin V.E., Blinkova A.V., Belov N.V., Samatova A.I. About inclined oil-water contacts of the upper juraic oil pools on the example of the Vatiegan field (p. 31‑36)

 

Kropotov M.V., Zykova V.A., Devyatkov A.M., Kosoreva N.P., Zakomaldin E.A. Results of implementation of the comprehensive program for additional studying of the geological structure of oil- and gas-condensate deposits of the PK formations of Pyakyahinskoe field (p. 37‑45)

 

GEOLOGICAL MODELING

 

Brandt E.V., Dolmatova S.S., Boronin P.A., Lagutina S.V., Grishkevich V.F., Kasatkin V.E. Geological modeling of the Urevskoye field’s achimovsky strata within bazhenov formation abnormal zone (p. 46‑54)

 

Semenov S.V., Sentsov A.Yu., Reimer V.V., Pankova O.B., Ovchinnikova E.I., Mel’nikov A.N., Moroz A.S., Yunusov R.R. Strategy for a jurassic object commissioning using a probabilistic approach (p. 55‑60)

 

Cherepanov E.A., Spirina A.M. Experience of petro-elastic modeling application when developing seismogeological models of reservoirs with a complex lithological structure and phase state (p. 61‑69)

 

Lyalin A.V., Lyalina O.E., Abdurakhmanova I.N., Sultanov M.A. Complexion of seismogeological methods for identifying detrital underwater paleocones in the achimov stratum (latitudinal Pre-ob) (p. 70‑73)

 

Aleksandrov D.V., Lavrenov S.V. Standardization of approaches to interpretation when supporting processing on the example of the South-Kochevsky cube 3D (100 km2) (p. 74‑79)

 

GEOCHEMICAL RESEARCH WORK

 

Titov Yu.V., Astarkin S.V., Pavlenko K.V., Galimova G.M., Kozakova O.V. Paleogeography of the early cretaceous Pyakyakhino-Khalmerpayutinsky swell basin according to lithogeochemical research data (p. 80‑86)

 

DEVELOPMENT OF OIL AND GAS FIELDS

 

Yudchits V.V., Litovar R.E., Sentsov A.Yu., Druchin V.S., Yunusov R.R., Nazarov M.V. Improvement of the system of the Symoryakhsky field development by using wells of complex design (p. 87‑92)

 

Bakirov D.L., Zholudeva V.A., Kolpakov V.V., Babushkin E.V., Fattakhov M.M., Vaulin V.G., Rakhmatullin I.R., Kunakasov A.A. Research of the influence of drilling fluids mineralization on the reservoir properties of zeolite-containing rocks (p. 93‑99)

 

Barakin V.A., Dotsenko A.S., Druchin V.S., Kalugin A.A., Ovchinnikova E.I., Panov S.F., Semenov S.V., Sentsov A.Yu. The results of the correlation update of the AB formations group of the Urievsky deposit for localization of residual reserves (p. 100‑104)

 

Gilfanov E.F. Comparison of the formation reservoir properties by the data of studying the pressure drop curve during a formation hydraulic fracturing and the pressure recovery curve (p. 105‑108)

 

Shlyapkin A.S., Tatosov A.V. Formation of a hydraulic fracture by a high-viscous gel (p. 109‑112)

 

 

Information on the articles

 

UDC 553.98.04          DOI: 10.30713/2413-5011-2020-9(345)-4-19

 

EVOLUTION OF SEDIMENTS AND FLUID-CONDUCTING SYSTEM
OF THE BAZHENOVSKAYA FORMATION (p. 4)

 

Vladimir Filippovich Grishkevich, Dr. of geol.-mineral. sci.,

Victor Egorovich Kasatkin, Cand. of geol.-mineral. sci.,

Svetlana Vladimirovna Lagutina,

Svetlana Sergeevna Dolmatova,

Elena Vladimirovna Panina,

Gennady Anatolyevich Smolyakov,

Anastasia Vladimirovna Sivkova,

G.Kh. Shaikhutdinova,

Anastasia Germanovna Laptey

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: GrishkevichVF@tmn.lukoil.com, KasatkinVE@tmn.lukoil.com, LagutinaSV@tmn.lukoil.com, DolmatovaSS@tmn.lukoil.com, PaninaEV@tmn.lukoil.com, SmolyakovGA@tmn.lukoil.com, SivkovaAV@tmn.lukoil.com, ShayhutdinovaGH@tmn.lukoil.com

 

The paper provides an analysis of methodological recommendations for calculating oil reserves in the Bazhenov and Domanik deposits. To test the recommendations, resources was carried out of the Imilorsky license area in the Western Siberia were assessed. As part of this work, an attempt was made to systematize ideas about the genesis of fractured reservoirs of the Bazhenov formation and analyze the possible mechanism of a fractured reservoir formation for the Imilorskoye field.

 

Keywords: Bazhenov formation; collector; oil potential; resources; Imilorskoye field.

 

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UDC 553.98(571.1)          DOI: 10.30713/2413-5011-2020-9(345)-20-30

 

POSSIBILITIES OF FORECASTING OIL AND GAS POTENTIALS IN THE PRE-JURASSIC
SEDIMENTS OF THE SHAIM OIL- AND GAS-BEARING REGION
OF THE WESTERN SIBERIA (p. 20)

 

Elena Alekseevna Shvetsova,

Elena Viktorovna Mukhlygina

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: ShvetcovaEA@tmn.lukoil.com, MuhlyginaEV@tmn.lukoil.com

 

Based on the results of a comprehensive interpretation of seismic and drilling data, the classification of deposits of the Pre-Jurassic complex (PJC) and the weathering crust was refined in order to identify promising zones and hydrocarbon traps in the sites of the Shaim oil and gas region. The Pre-Jurassic complex in this area should be studied in two directions. The first one is aimed at studying a Pre-Jurassic object associated with reservoirs of argillaceous-siliceous shale, the other one is aimed at studying this object associated with reservoirs of acidic rocks. Currently, there are many authors’ seismic data processing techniques, mainly 3D seismic surveys, all of them need to be tested.

 

Keywords: seismic survey CDP-3D; interpretation; correlation; Pre-Jurassic deposits; productive layers; dynamic analysis; seismic attributes; seismic "image".

 

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UDC 551.86:551.468:551.763.12          DOI: 10.30713/2413-5011-2020-9(345)-31-36

 

ABOUT INCLINED OIL-WATER CONTACTS OF THE UPPER JURAIC OIL POOLS
ON THE EXAMPLE OF THE VATIEGAN FIELD (p. 31)

 

Elena Vladimirovna Panina,

Dmitriy Aleksandrovich Laminskiy,

Vladimir Filippovich Grishkevich, Dr. of geol.-mineral. sci.,

Nataliya Yur’yevna Moskalenko,

Svetlana Vladimirovna Lagutina,

Viktor Egorovich Kasatkin, Cand. of geol.-mineral. sci.,

Anna Viktorovna Blinkova

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: PaninaEV@tmn.lukoil.com, LaminskiiDA@tmn.lukoil.com, GrishkevichVF@tmn.lukoil.com, MoskalenkoNY@tmn.lukoil.com, LagutinaSV@tmn.lukoil.com, KasatkinVE@tmn.lukoil.com, BlinkovaAV@tmn.lukoil.com

 

Nikolay Valer’yevich Belov,

Aliya Il’gizovna Samatova

 

LLC "LUKOIL–West Siberia"

20, Pribaltijskaya str., Kogalym, Tumen region, 628486, Russian Federation,

e-mail: Nikolay.Belov2@lukoil.com, Aliya.Samatova@lukoil.com

 

Geological-geophysical information, obtained at the Vatiegan field, such as core data, test results field-geophysical studies, wells work for each perforation interval separately, was comprehensively analyzed. It resulted in developing an oil pool’s geological model of YuV1 productive formation. To build the oil-water contact (OWC) surface, wells with "accurate" saturation determination were initially used, in which there is a core in ultraviolet light (UV), where oil-saturated and water-bearing reservoirs are confidently separated. The inclined oil-water contact is reliably established.

 

Keywords: oil-water contact (OWC); formation; transition zone; critical water saturation; the Verkhnevasyugan sequence.

 

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UDC 553.98(571.1):550.8.072          DOI: 10.30713/2413-5011-2020-9(345)-37-45

 

RESULTS OF IMPLEMENTATION OF THE COMPREHENSIVE PROGRAM FOR ADDITIONAL STUDYING OF THE GEOLOGICAL STRUCTURE OF OIL- AND GAS-CONDENSATE
DEPOSITS OF THE PK FORMATIONS OF PYAKYAHINSKOE FIELD (p. 37)

 

Mikhail Vasilevich Kropotov,

Vera Anatolyevna Zykova,

Aleksey Mikhailovich Devyatkov,

Nadezhda Petrovna Kosoreva,

Evgeny Alexandrovich Zakomaldin

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: KropotovMV@tmn.lukoil.com, ZykovaVA@tmn.lukoil.com

 

The paper describes the stages of a comprehensive program for additional studying of the PK formations of Pyakyakhinskoye field deposits based on the interpretation of 3D seismic survey operations (SSO), using advanced developments in the field of geophysical studies of wells (GIS), analysis of test results, analysis of cuttings while drilling and testing the formation in an open borehole. The changes in the geological model as a result of the measures taken are presented. The degree of knowledge of the PK formations study is assessed.

 

Keywords: oil; gas; fringe; gas cap; the Aptian stage; PK formations.

 

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UDC 550.8.072          DOI: 10.30713/2413-5011-2020-9(345)-46-54

 

GEOLOGICAL MODELING OF THE UREVSKOYE FIELD’S ACHIMOVSKY STRATA
WITHIN BAZHENOV FORMATION ABNORMAL ZONE (p. 46)

 

Ekaterina Vyacheslavovna Brandt,

Svetlana Sergeevna Dolmatova,

Pavel Alexandrovich Boronin,

Svetlana Vladimirovna Lagutina,

Vladimir Filippovich Grishkevich, Dr. of geol.-mineral. sci.,

Victor Egorovich Kasatkin, Cand. of geol.-mineral. sci.

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: BrandtEV@tmn.lukoil.com, DolmatovaSS@tmn.lukoil.com, BoroninPA@tmn.lukoil.com, LagutinaSV@tmn.lukoil.com, GrishkevichVF@tmn.lukoil.com, KasatkinVE@tmn.lukoil.com

 

A geological model of the Urevskoye field’s Achimovsky deposits in Bazhenov formation abnormal zone was developed with account of the conceptual modeling and 3D seismic sections referenced layers correlation. The reservoir properties of Achimovsky productive strata and sandy penetrating bodies, that split bazhenites, have been analyzed. As a result, the stratigraphic reference of well’s productive intervals to evaluated objects has been clarified.

 

Keywords: geological modeling; Achimovsky strata; Bazhenov formation abnormal zone.

 

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UDC 622.276.1/.4.001.57          DOI: 10.30713/2413-5011-2020-9(345)-55-60

 

STRATEGY FOR A JURASSIC OBJECT COMMISSIONING USING
A PROBABILISTIC APPROACH (p. 55)

 

Sergey Viktorovich Semenov,

Aleksey Yur’yevich Sentsov,

Vladimir Vital’yevich Reimer,

Olga Borisovna Pankova,

Evgeniya Igorevna Ovchinnikova,

Aleksandr Nikolayevich Mel’nikov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: SemenovSV@tmn.lukoil.com, SentsovAY@tmn.lukoil.com, ReimerVV@tmn.lukoil.com, PankovaOB@tmn.lukoil.com, OvchinnikovaEI@tmn.lukoil.com, MelnikovAN@tmn.lukoil.com

 

Aleksandr Sergeyevich Moroz

 

TPP "Langepasneftegaz" LLC "LUKOIL–Western Siberia"

43, Lenina str., Langepas, Tumen region, 628672, Russian Federation,

e-mail: Aleksandr.Moroz@lukoil.com

 

Radmir Rufovich Yunusov

 

LLC "LUKOIL–West Siberia"

20, Pribalijskaya str., Kogalym, Tumen region, 628486, Russian Federation,

e-mail: Radmir.Unusov@lukoil.com

 

At the moment, the vast majority of fields in the Western Siberia are at the final stage of development. The left well stock planned for drilling is usually located in the marginal zones characterized by low residual reserves. The authors of this paper consider an approach based on the use of probabilistic modeling in order to form a development option that allows optimization of the wells drilling sequence and is the most resistant to possible geological and technological risks.

 

Keywords: probabilistic approach; variable models; minimization of risks; optimal development system; development strategy.

 

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UDC 550.834.072          DOI: 10.30713/2413-5011-2020-9(345)-61-69

 

EXPERIENCE OF PETRO-ELASTIC MODELING APPLICATION WHEN DEVELOPING SEISMOGEOLOGICAL MODELS OF RESERVOIRS WITH A COMPLEX
LITHOLOGICAL STRUCTURE AND PHASE STATE (p. 61)

 

Evgeniy Aleksandrovich Cherepanov1,2, Cand. of geol.-mineral. sci.,

Anastasiya Mikhaylovna Spirina1

 

1LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: CherepanovEA@tmn.lukoil.com, SpirinaAM@tmn.lukoil.com

 

2Tyumen Industrial University

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

 

The paper, using petro-elastic modeling, specifies the stratigraphic boundaries of the Pre-Jurassic deposits of the Potanai-Kartop’inskoe field in the cube of a 3D seismic survey. This made it possible to increase the likelihood of predicting the development zones of improved reservoirs, as well as to adjust the window interval for performing seismic inversion.

 

Keywords: petro-elastic modeling; Pre-Jurassic deposits; weathering crust; stratigraphic breakdowns.

 

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UDC 550.834.05          DOI: 10.30713/2413-5011-2020-9(345)-70-73

 

COMPLEXION OF SEISMOGEOLOGICAL METHODS FOR IDENTIFYING DETRITAL UNDERWATER PALEOCONES IN THE ACHIMOV STRATUM (LATITUDINAL PRE-OB) (p. 70)

 

Alexander Viktorovich Lyalin, Cand. of geol.-mineral. sci.,

Olga Evgenievna Lyalina,

Inna Nikolaevna Abdurakhmanova,

Muradkhan Abdinovich Sultanov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

40, Shirokaya str., Kogalym, Tumen region, 628483, Russian Federation,

e-mail: LyalinA@tmn.lukoil.com, Lyalinaoe@tmn.lukoil.com, Abdurakhmanovainna@lukoil.com, Sultanovma@lukoil.com

 

The paper presents information about the studies of the internal structure of the Achimov stratum, depending on seismic data. With the help of the dynamic analysis, the seismic-stratigraphic aspects of identifying the wave pattern, comparable with the geological facies of underwater detrital paleo-cones and paleo-slides, have been studied and analyzed.

 

Keywords: seismic exploration; CDP-3D; dynamic analysis; layers; seismic stratigraphy; underwater detrital paleo-cones; paleo-porous-vuggy reservoir rock (PVRR).

 

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UDC 550.834.52          DOI: 10.30713/2413-5011-2020-9(345)-74-79

 

STANDARDIZATION OF APPROACHES TO INTERPRETATION WHEN SUPPORTING PROCESSING ON THE EXAMPLE OF THE SOUTH-KOCHEVSKY CUBE 3D (100 KM2) (p. 74)

 

Dmitriy Viktorovich Aleksandrov,

Sergey Viktorovich Lavrenov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: AleksandrovDV@tmn.lukoil.com, LavrenovSV@tmn.lukoil.com

 

The use of methodological approaches for the analysis and maintenance of processing stages is often not standardized, variations of the methodologies used from volume to volume may differ and depend on the experience accumulated in the structural unit. The paper presents some approaches to the standardization of typical solutions for interpretive support of processing, which is called the "Well Driven Seismic" method in foreign companies. The applied methodological solutions allow monitoring at the earliest stages of seismic data processing. The result is the processed seismic data, which is maximally suitable for the geological task.

 

Keywords: CDP 3D; seismogram; interpretation processing; well; binding; attribute; reflective horizon; quality control.

 

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UDC 553.98.061.17          DOI: 10.30713/2413-5011-2020-9(345)-80-86

 

PALEOGEOGRAPHY OF THE EARLY CRETACEOUS PYAKYAKHINO-KHALMERPAYUTINSKY
SWELL BASIN ACCORDING TO LITHOGEOCHEMICAL RESEARCH DATA (p. 80)

 

Yuri Vladimirovich Titov,

Sergey Vasilievich Astarkin,

Kirill Viktorovich Pavlenko,

Gulnaz Maratovna Galimova,

Olga Vladimirovna Kozakova

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19/18, Tsentralnaya str., Kogalym, Tumen region, 628483, Russian Federation,

e-mail: TitovYV@tmn.lukoil.com, AstarkinSV@tmn.lukoil.com, PavlenkoKV@tmn.lukoil.com, GalimovaGM@tmn.lukoil.com, KozakovaOV@tmn.lukoil.com

 

The Pyakhyakhino-Khalmerpayutinsky swell, located in the Tazovsky region of the Yamalo-Nenets autonomous territory, is a highly promising area for prospecting for oil, gas and gas condensate. However, the Lower Cretaceous deposits, characterized by high oil and gas potential, still remain poorly studied. The paper describes the chemical composition of terrigenous rocks within the Pyakyakhino-Khalmerpayutinsky swell. It was revealed that the rocks belong to greywackes, litites and arkoses. Based on a comprehensive analysis of the geochemical data, it has been established that the main sources of clastic material were magmatic formations of predominantly acid composition. The paleo-basin of the Pyakyakhino-Khalmerpayutinsky swell was a freshened shallow water body located in close proximity to the coastline. Sedimentation during the Early Cretaceous time occurred at different distances from the sources of drift.

 

Keywords: Pyakyakhino-Khalmerpayutinsky swell; Lower Cretaceous age; terrigenous rocks; petro-genic oxides; small elements; rare earth elements; sources of demolition.

 

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UDC 622.276.43          DOI: 10.30713/2413-5011-2020-9(345)-87-92

 

IMPROVEMENT OF THE SYSTEM OF THE SYMORYAKHSKY FIELD DEVELOPMENT
BY USING WELLS OF COMPLEX DESIGN (p. 87)

 

Vitaliy Viktorovich Yudchits,

Rodion Evgen’yevich Litovar,

Aleksey Yur’yevich Sentsov,

Vitaliy Sergeyevich Druchin, Cand. of geol.-mineral. sci.

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: YudchitsVV@tmn.lukoil.com, LitovarRE@tmn.lukoil.com, SentsovAY@tmn.lukoil.com, DruchinVS@tmn.lukoil.com

 

Radmir Rufovich Yunusov,

Mikhail Viktorovich Nazarov

 

LLC "LUKOIL–West Siberia"

20, Pribalijskaya str., Kogalym, Tumen region, 628486, Russian Federation,

e-mail: Radmir.Unusov@lukoil.com, Mikhail.Nazarov@lukoil.com

 

The productivity of Middle Jurassic strata (Tyumen Formation) is established for 23 fields belonging to the Territorial Production Complex (TPC) “Uraineftegas”. They contain more than 34 % of the initial recoverable reserves.

These predominantly continental deposits have a complex geological structure. They are significantly heterogeneous along the lithological cross-section, their thickness varies laterally, and reservoir properties are low.

In today economic environment, successful development of Tyumen Formation requires constant exploration and implementation of new technologies in order to compensate for low reservoir properties and to increase oil production. One of the examples of such technologies successful implementation at Symoryakhskoye field is multi-lateral wells drilling with multi-stage hydraulic fracturing.

 

Keywords: complex design wells; multi-lateral wells; horizontal wells; multi-lateral wells with multi-stage hydraulic fracturing.

 

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UDC 622.244.442          DOI: 10.30713/2413-5011-2020-9(345)-93-99

 

RESEARCH OF THE INFLUENCE OF DRILLING FLUIDS MINERALIZATION
ON THE RESERVOIR PROPERTIES OF ZEOLITE-CONTAINING ROCKS (p. 93)

 

Daniyar Lyabipovich Bakirov, Cand. of tech. sci.

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: BakirovDL@tmn.lukoil.com

 

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

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19, Tsentralnaya str., Kogalym, Tumen region, 628483, Russian Federation,

e-mail: ZholudevaVA@tmn.lukoil.com

 

Vitaly Viktorovich Kolpakov

 

LLC "Gazpromneft" NTTs

14, 50 years of October str., Tyumen, 625048, Russian Federation,

e-mail: Kolpakov.VV@gazpromneft-ntc.ru

 

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

Marsel Masalimovich Fattakhov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: BabushkinEV@tmn.lukoil.com, Fattahovmm@tmn.lukoil.com

 

Vladimir Gennadievich Vaulin

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

106, Melnikaite str., Tyumen, 625026, Russian Federation,

e-mail: VaulinVG@tmn.lukoil.com

 

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

Artur Akhatovich Kunakasov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

19, Tsentralnaya str., Kogalym, Tumen region, 628483, Russian Federation,

e-mail: RahmatullinIR@tmn.lukoil.com, KunakasovAA@tmn.lukoil.com

 

The effect of the drilling mud salinity on the reservoir properties of zeolite-containing rocks has been researched. Based on the results of a comprehensive interpretation of special filtration and lithological studies, differences in the interaction of mineralized and fresh drilling fluids on the cement of zeolite-containing rocks were revealed.

 

Keywords: permeability; porosity; fresh and saline drilling fluids; zeolites; clay minerals.

 

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UDC 622.276.031.011.43          DOI: 10.30713/2413-5011-2020-9(345)-100-104

 

THE RESULTS OF THE CORRELATION UPDATE OF THE AB FORMATIONS GROUP
OF THE URIEVSKY DEPOSIT FOR LOCALIZATION OF RESIDUAL RESERVES (p. 100)

 

Vladimir Anatol’yevich Barakin,

Aleksandr Sergeyevich Dotsenko,

Vitaliy Sergeyevich Druchin,

Evgeniya Igorevna Ovchinnikova,

Stanislav Fedorovich Panov,

Sergey Viktorovich Semenov,

Aleksey Yur’yevich Sentsov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: BarakinVA@tmn.lukoil.com, DocenkoAS@tmn.lukoil.com, DruchinVS@tmn.lukoil.com, OvchinnikovaEI@tmn.lukoil.com, PanovSF@tmn.lukoil.com, SemenovSV@tmn.lukoil.com, SentsovAY@tmn.lukoil.com

 

Aleksandr Aleksandrovich Kalugin

 

LLC "LUKOIL–Engineering"

buil. 1, 3, Pokrovsky Boulevard, Moscow, 109028, Russian Federation,

e-mail: KaluginAA@lukoil.com

 

The high depletion of the main objects of the Urievskoye field requires paying attention to the intervals that are poorly involved in development. When performing an industrial recalculation of the Urievskoye field reserves, while linking the indexing of AB group productive formations with the neighboring territories, there emerged a problem of dividing AB13 and AB2 formations which have different reservoir properties. As a result of the correlation revision, in addition to linking the boundaries of the Urievskoye field formations with neighboring areas, it became possible to localize the AB13 formation productive zones, which significantly differs in its facies features from the underlying the AB2 formation. The results of the geological structure update will form the basis for choosing the approaches for the residual reserves recovery when the AB13 formation of the Urievskoye field is separated into a separate development object.

 

Keywords: oil; formation; AB13; AB2; facies; correlation; geological model; filtration properties.

 

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UDC 622.276.031:53          DOI: 10.30713/2413-5011-2020-9(345)-105-108

 

COMPARISON OF THE FORMATION RESERVOIR PROPERTIES BY THE DATA OF STUDYING
THE PRESSURE DROP CURVE DURING A FORMATION HYDRAULIC FRACTURING
AND THE PRESSURE RECOVERY CURVE (p. 105)

 

Eduard Fuatovich Gilfanov

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: GilfanovEF@tmn.lukoil.com

 

The joint use of the results, obtained during the test data processing of the pressure drop curve (PDC) and the pressure recovery curve (PRC) during hydraulic fracturing of a formation (HFF) is considered. A model of permeability distribution along the filter area of the horizontal section of the wellbore is obtained. On the basis of bi-logarithmic plots, fracture breakthroughs into the nearby water-bearing strata located above or below are determined.

 

Keywords: multi-stage hydraulic fracturing of a formation; Nolte function (G-function); pressure recovery curve (PRC); pressure drop curve (PDC); reservoir pressure; permeability coefficient.

 

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UDC 622.276.432:622.276.66          DOI: 10.30713/2413-5011-2020-9(345)-109-112

 

FORMATION OF A HYDRAULIC FRACTURE BY A HIGH-VISCOUS GEL (p. 109)

 

Aleksey Sergeyevich Shlyapkin

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

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

e-mail: ShlyapkinAS@tmn.lukoil.com

 

Aleksey Viktorovich Tatosov, Dr. of phys.-math. sci., Professor

 

Tyumen State University

6, Volodarskogo str., Tyumen, 625003, Russian Federation,

e-mail: atatosov@utmn.ru

 

Hydraulic fracturing of a formation (HFF) is currently one of the most commonly used stimulation methods to intensify operation of oil and gas wells. Every year there is an increase in the volume of hydraulic fracturing operations, the requirements for the process of preparing and carrying out measures to ensure the efficiency of the work raise. One of the important tools for the high-quality design of hydraulic fracturing parameters is a hydraulic fracturing simulator – a software product based on the work of mathematical functions that take into account the geological and physical characteristics of the development object, technical and technological parameters of the formation stimulation processes. There is a significant range of software products of foreign and Russian production used for developing of hydraulic fracturing designs. Hydraulic Fracturing simulators are based on complex mathematical models.

The paper studies processes of a formation hydraulic fracturing, describes the calculation processes using a one-dimensional mathematical model for the subsequent rapid assessment of the geometric parameters of a hydraulic fracture in order to be able to design the optimal parameters of hydraulic fractures to maximize productivity, prevent negative aftereffects (risks of breakthrough into off-target intervals, technological complications, etc.). The paper highlights the results of a computational experiment carried out using a one-dimensional model of hydraulic fracturing in the Perkins – Kern – Norgen representation. The calculation is performed using dimensional values. In contrast to the previously published works of the authors, the presented model considers the process of formation of a hydraulic fracture in a rock with low filtration characteristics. The use of a high-viscous gel in the calculation determines a high bearing capacity, the deposition in the framework of the given computational experiment is considered insignificant.

The dependence of the average width and shape of the fracture on the change in the viscosity of the fracturing fluid while maintaining the injection parameters has been established. Significant changes are noted in the behavior of the "tip" of the fracture when a more viscous gel is injected, which is associated with an increase in the concentration of particles in this area. The results obtained can be used in engineering practice to study the process of hydraulic fracture formation when using proppant as a propping agent.

 

Keywords: viscous gel; hydraulic fracture; proppant; mathematical model; fixed fracture.

 

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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY"

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