ISSN 2413-5011

Scientific-technical journal

GEOLOGY, GEOPHYSICS

AND DEVELOPMENT OF OIL AND GAS FIELDS

                                                                                                       published since 1992

October 2020                           ¹ 10(346)                       12 issues per year

 

CONTENÒS

 

OIL AND GAS PROSPECTING

 

Shakirov V.A., Vilesov A.P., Istomina N.M., Sobolev V.I., Sereda I.A. Reasons for different capacity of the fransnian riphogenic oil traps in the Volostnovsko-Rybkinsky section of the Orenburg region (p. 4‑11)

 

Kudamanov A.I., Agalakov S.E., Marinov V.A., Novoselova M.Yu., Karikh T.M., Glukhov T.V. Traces of tectonic control sedimentations accumulated during the turonian age in the Western Siberia (p. 12‑21)

 

Vanin V.A., Uryadov S.A., Borovkova E.E., Mameeva Yu.R., Safronov V.O. A new look at the old deposit: oil prospects for the Osinsky horizon oil potential of the Bratsk deposit in the Irkutsk region (p. 22‑27)

 

Nassonova N.V., Fishchenko A.N., Kholmanskikh N.V., Lapina L.V. Regional tectonic trends and their impact on oil and gas potential in the Em-Egovsky and Kamennoye license areas of the Krasnoleninskoye field (p. 28‑34)

 

Novoselova M.Yu., Agalakov S.E., Kudamanov A.I. Characteristic of the upper cretaceous fluid seals of the Western Siberia 35‑46)

 

GEOLOGICAL MODELING

 

Titenkov A.S., Shirokov A.S., Grandov D.V., Utyashev Yu.N., Nazarov A.V. Geological modeling using isochronous correlation on the example of the layers of the Verkhneyakovlevskaya suite (p. 47‑53)

 

Grishchenko M.A., Aksenov A.I., Maksimovich O.D., Shchetinin A.S., Krivoshchekov I.S., Osipenko A.S. Seismic facial modeling as a tool for increasing the reliability of the production forecast for the PK1 layer of the Beregovoye field (p. 54‑61)

 

Aipov N.A., Nedel’ko O.V., Vilesov A.P., Makarova A.A., Krokhaleva O.A., Lazarenko S.A. Building of a geological model of the botuobinsky horizon of the Srednebotuobinskoye deposit based on complexing of geological-geophysical and field data (p. 62‑67)

 

RESEARCH OF FORMATIONS AND WELLS

 

Zagidullin M.I., Potapov A.G., Abdrakhmanov E.S., Salomatin E.N., Gilmanov Ya.I. Experience of studying the capacitive properties and saturation of reservoirs containing superviscous oils applying the NMR method (p. 68‑77)

 

Zanochuev S.A., Polyakov A.V., Ponomareva T.S. The study of thermal heat capacity of liquid hydrocarbons of Beregovoye deposit by the method of differential scanning calorimetry (p. 78‑83)

 

Subbotin M.D., Pavlov V.A., Korolev D.O., Yakubovsky A.S., Kudymov A.Yu., Samoilov M.I. Specialized laboratory core studies for solving the problems of drilling, hydraulic fracturing of a formation and development of oil and gas fields (p. 84‑92)

 

Magdenko S.S., Zhilin D.I., Vakhrusheva I.A., Khamitov D.R. Information system "RN-LAB" as a tool for optimizing the activities of the metrological service (p. 93‑98)

 

Shulga R.S., Salomatin E.N., Novosadova I.V. The effect of wettability on the resistivity of water-saturated and oil-water-saturated rocks in the atmospheric and thermobaric reservoir conditions (p. 99‑105)

 

DEVELOPMENT OF OIL AND GAS FIELDS

 

Nikiforov D.V., Glukhikh I.N. Improved method of analogues-objects selection when designing oil and gas fields development by using case-based reasoning (p. 106‑111)

 

Starikov M.A., Kiselev V.L., Arkhipov V.N., Grandov D.V., Utyashev Yu.N., Evdoshchuk A.A. The influence of methodological approaches to tight sandstones modeling on the estimation accuracy of hydrocarbons production levels (p. 112‑118)

 

 

Information on the articles

 

UDC 553.98(470.56)          DOI: 10.30713/2413-5011-2020-10(346)-4-11

 

REASONS FOR DIFFERENT CAPACITY OF THE FRANSNIAN RIPHOGENIC OIL TRAPS
IN THE VOLOSTNOVSKO-RYBKINSKY SECTION OF THE ORENBURG REGION (p. 4)

 

Vladislav Alimovich Shakirov, Cand. of geol.-mineral. sci.,

Alexander Petrovich Vilesov, Cand. of geol.-mineral. sci.,

Natalia Mikhailovna Istomina

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: tnnc@rosneft.ru

 

Victor Igorevich Sobolev

 

JSC "Orenburgneft"

2, Magistralnaya str., Buzuluk, 461046, Orenburg region, Russian Federation,

e-mail: orenburgneft@rosneft.ru

 

Ilya Alexandrovich Sereda, Cand. of phys.-math. sci.

 

PJSC NK "Rosneft"

26/1, Sofijskaya embankment, Moscow, 117997, Russian Federation

 

Oil deposits opened in the Upper Fransnian reefogenic reservoirs of the Volostnovsko-Rybkinsky area in 2015–2018 proved incomplete confirmation of the predicted resources. The main reason for the inaccurate prediction is the different content of oil in reef traps. As shown by the geological analysis, this can be explained by the variable quality of the above-reef seal. Moreover, despite the relatively small area of the research, the seal is characterized by significant lithological heterogeneity and, as a result, the variability of the physical properties of the rocks-seals. The above-reef seals were subjected to typification by lithological properties, their reservoir properties were estimated by the core. The main typical sections of potential seals and their spreading over the area are determined. The identified types of seals with the classification of clay seals were compared by V.I. Osipov classification.

 

Keywords: single reefs; the Upper Fransnian age; reefogenic oil traps; tires; seals; occupancy of traps.

 

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UDC 553.98(571.1)          DOI: 10.30713/2413-5011-2020-10(346)-12-21

 

TRACES OF TECTONIC CONTROL SEDIMENTATIONS ACCUMULATED
DURING THE TURONIAN AGE IN THE WESTERN SIBERIA (p. 12)

 

Alexander Ivanovich Kudamanov, Cand. of geol.-mineral. sci.,

Sergey Evgenievich Agalakov, Cand. of geol.-mineral. sci.,

Vladimir Arkadievich Marinov, Cand. of geol.-mineral. sci.,

Maya Yurievna Novoselova,

Tatiana Mikhailovna Karikh,

Timofey Vadimovich Glukhov

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: aikudamanov@tnnc.rosneft.ru

 

Against the background of the gas fields’ depletion in the Western Siberia, the study of the Upper Cretaceous part of the section, where manifestations, gas inflows and open deposits have long been known, is becoming more and more urgent. Above the Cenomanian deposits of the Pokurskaya suite, the greatest prospects are associated with clayey siltstones of the Kuznetsovsky horizon (the Gazsalinskaya pack or the Turonian T layer with a depth of 800...1300 m), as well as argillaceous-siliceous sediments (opokas) of the Lower Berezovskaya sub-formation of the Konyak-Santonian age, lying directly above the Gazsalinskaya pack. The rocks of these deposits are characterized by a consistent composition and structure over most of the territory of the Western Siberia. Unevenly clayey rocks (siltstones and opokas) of complex genesis can be unconventional reservoirs, which is primarily due to the peculiarities of their sedimentation and, secondly, the ambiguous history of sediments lithogenesis. The paper presents in brief some features of the environments and conditions of sedimentation of the productive Gazsalinskaya pack of the Turonian age.

 

Keywords: core; Kuznetsovskaya suite; Gazsalinskaya pack; T layer; the Turonian age; Koltogorsk-Urengoy rift system; fault; transgression; regression; compression-stretching of the Earth’s crust.

 

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UDC 553.98(571.53)          DOI: 10.30713/2413-5011-2020-10(346)-22-27

 

A NEW LOOK AT THE OLD DEPOSIT: OIL PROSPECTS FOR THE OSINSKY HORIZON OIL
POTENTIAL OF THE BRATSK DEPOSIT IN THE IRKUTSK REGION (p. 22)

 

Valeriy Alexandrovich Vanin,

Sergey Aleksandrovich Uryadov,

Elena Egorovna Borovkova,

Yulia Rishatovna Mameeva

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: vavanin@tnnc.rosneft.ru

 

Vladimir Olegovich Safronov

 

PJSC NK "Rosneft"

26/1, Sofiyskaya embankment, Moscow, 117997, Russian Federation.

 

The Bratsk gasocondensate field in the Irkutsk region was discovered in 1975. It was not studied by 3D seismic exploration. It is being developed by a minimal stock of exploration wells due to the very limited local demand for gas and the large distance of the field from the main gas pipeline. At the same time, access to the Bratskoye field is provided by an all-season automobile road, it is located near the ESPO oil pipeline and the railway line. In 2018–2020 the authors of the paper summarized the available geological and geophysical information, obtained from the field, the materials published in different years and identified a promising potential oil-bearing object in the Osinsky horizon. The geological structure of the Osinsky object, its genesis and secondary reservoir transformations are considered. It is recommended to drill a prospecting and appraisal well with a minimum geological risk and a maximum probability of obtaining commercial oil production rate. Modern methods of testing the object and stimulation of the inflow are proposed.

 

Keywords: Osinsky horizon; carbonate deposits; biomorphic bodies; secondary transformations; oil.

 

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UDC 553.98(571.1)(–17)          DOI: 10.30713/2413-5011-2020-10(346)-28-34

 

REGIONAL TECTONIC TRENDS AND THEIR IMPACT ON OIL AND GAS POTENTIAL
IN THE EM-EGOVSKY AND KAMENNOYE LICENSE AREAS
OF THE KRASNOLENINSKOYE FIELD (p. 28)

 

Natalia Valentinovna Nassonova,

Angelika Nikolaevna Fishchenko,

Nadezhda Vladimirovna Kholmanskikh,

Lyudmila Viktorovna Lapina

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation.

 

The influence of the regional geodynamic history of the Paleo-Ural on the paleo-tectonic development of the Krasnoleninsky arch is considered. The synchronicity of events in the Cenozoic age is noted. Tectonic movements influenced the oil and gas potential of productive deposits. They contributed to the formation of stretch zones. They are most often associated with the deposits in the Pre-Jurassic formations, as well as increased gas content in productive formations of the Tyumen and Vikulovskaya formations, which is important when developing the fields.

 

Keywords: Krasnoleninsky arch; stretch zones; deposits in the Pre-Jurassic formations; gas content.

 

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UDC 553.98(571.1)          DOI: 10.30713/2413-5011-2020-10(346)-35-46

 

CHARACTERISTIC OF THE UPPER CRETACEOUS FLUID SEALS
OF THE WESTERN SIBERIA (p. 35)

 

Maya Yurievna Novoselova,

Sergey Evgenievich Agalakov, Cand. of geol.-mineral. sci.,

Alexander Ivanovich Kudamanov, Cand. of geol.-mineral. sci.

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: aikudamanov@tnnc.rosneft.ru

 

The Upper Cretaceous deposits of Western Siberia consist of five seismic-stratigraphic complexes (SSC, from bottom to top): Pokursky (Cenomanian), Kuznetsovsky (Turonian-Lower Conacian), Nizhneberezovsky (Middle Conacian-Santonian), Verkhneberezovskiy (Campanian), and Ganinsky (Upper Campanian-Maastrichtian) , each of which is either a productive or potentially productive horizon. In the previous works of the authors, their conceptual structure was revealed, and a brief stratigraphic and litho-facies characteristic of each SSC was given.

This paper is devoted to the results of studying the seals of the identified productive horizons. On the basis of the detailed correlation of deposits, seismic-stratigraphic and lithological-facies analysis, regional models of seals of the Pokurskiy, Kuznetsovskiy, Nizhneberezovskiy, Verkhneberezovskiy, and Gankinskiy reservoirs were built. Zones of their improved quality, as well as zones of loss of shielding properties have been mapped.

The conducted studies, together with the results of studying the reservoirs, made it possible to map the boundaries of promising regions, as well as to identify new promising structures in the Upper Cretaceous deposits of the West Siberian plate.

 

Keywords: the Upper Cretaceous Supra-Cenomanian deposits; seismic-stratigraphic complex (SSC); Kuznetsovsky horizon; Nizhneberezovsky horizon; Verkhneberezovsky horizon; Gankinsky horizon; structural map; storage tank; seal; reservoir.

 

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UDC 550.8.072          DOI: 10.30713/2413-5011-2020-10(346)-47-53

 

GEOLOGICAL MODELING USING ISOCHRONOUS CORRELATION ON THE EXAMPLE
OF THE LAYERS OF THE VERKHNEYAKOVLEVSKAYA SUITE (p. 47)

 

Alexey Sergeevich Titenkov,

Andrey Sergeevich Shirokov,

Dmitriy Vyacheslavovich Grandov,

Yuriy Nurmukhametovich Utyashev,

Alexey Vladimirovich Nazarov

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: astitenkov@tnnc.rosneft.ru

 

The paper presents the results of work on the refinement of the complex geological concept of the group of productive formations of the Verkhnyakovlevskaya suite (VYak2 and VYak31). Refinement of the concept is associated with a change in approaches to cross-well correlation based on the use of isochronous surfaces. The consistent integration of different-scale types of researches (lithological-mineralogical, sedimentological, geophysical) provided the possibility of mapping confident benchmarks in a complex sub-continental complex and adjusting the position of productive strata boundaries.

 

Keywords: geological model; correlation; discontinuous reservoir of continental genesis; marking horizon; project fund.

 

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UDC 550.832.4          DOI: 10.30713/2413-5011-2020-10(346)-54-61

 

SEISMIC FACIAL MODELING AS A TOOL FOR INCREASING THE RELIABILITY
OF THE PRODUCTION FORECAST FOR THE PK1 LAYER OF THE BEREGOVOYE FIELD (p. 54)

 

Marina Afanasyevna Grishchenko,

Alexander Ivanovich Aksenov,

Olga Dmitrievna Maksimovich,

Alexey Sergeevich Shchetinin,

Ilya Sergeevich Krivoshchekov,

Anton Stanislavovich Osipenko

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation.

 

Substantiation of the reasons for productive wells watering and forecasting the rate of watering are key issues when analyzing the development of gas deposits in the Pokurskaya suite sediments. The presented article is a continuation of research work in the field of forecasting the water cut when developing gas deposits of the PK1 layer of the Beregovoye field. During this object study, various-scale data were analyzed, including seismic, geological-geophysical and field characteristics of the layer.

To increase the predictive ability of the geological model, a comprehensive seismic facial analysis was carried out using seismic data and the results of detailed sedimentological studies of its own core and cores of layers-analogs of neighboring fields (Kharampursky, Yuzhno-Russky, Severo-Khancheysky+Khadyryakhinsky, etc.). Three cyclites – PK11, PK12, PK13, as well as zones with different types of section structure were identified in the reservoir interval. In the course of the work, a connection was established between seismic attributes and geological parameters with water cut, confirmed by the dynamics of changes in the level of the gas-water contact of the reservoir. Seismic facial modeling made it possible to refine the geological and geophysical parameters of the layer and improve the predictive ability of geological and hydrodynamic models.

 

Keywords: seismic facial modeling; cyclical analysis; wave pattern; lithological heterogeneity; coastal marine complex; well water cut.

 

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UDC 550.8.072          DOI: 10.30713/2413-5011-2020-10(346)-62-67

 

BUILDING OF A GEOLOGICAL MODEL OF THE BOTUOBINSKY HORIZON
OF THE SREDNEBOTUOBINSKOYE DEPOSIT BASED ON COMPLEXING
OF GEOLOGICAL-GEOPHYSICAL AND FIELD DATA (p. 62)

 

Nursultan Aipovich Aipov,

Olga Valerievna Nedel’ko,

Anna Andreevna Makarova

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation

 

Aleksandr Petrovich Vilesov

 

LLC "Gazpromneft–STC"

75–79, lit. D, Moika River embankment, St. Petersburg, 190000, Russian Federation,

e-mail: ntc_odo@gazpromneft-ntc.ru

 

Olga Alexandrovna Krokhaleva,

Svetlana Alexeevna Lazarenko

 

LLC "Taas-Yuryakh Neftegazodobycha"

32a, Pervomaiskaya str., Lensk, 678144, Republic of Sakha (Yakutia), Russian Federation,

e-mail: office@tyngd.rosneft.ru

 

Based on the results of a detailed sedimentological analysis of the core, a fundamentally new conceptual sedimentological model of the BT formation of the Srednebotuobinskoye field was formed and the geological model of the Botuobinsky horizon was updated based on sequence-stratigraphic analysis. A comprehensive analysis of the data showed that a hierarchy of chrono-stratigraphic surfaces was traced in the section, limited by genetically related intervals in a relatively ordered and repetitive form. Based on the results of para-sequencies mapping, the boundaries of the facies distribution were outlined, and the displacements of local delta areas were tracked.

 

Keywords: vendor; sequence; para-sequence; geological model; delta genesis.

 

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UDC 622.276.031.011.43:550.832.582          DOI: 10.30713/2413-5011-2020-10(346)-68-77

 

EXPERIENCE OF STUDYING THE CAPACITIVE PROPERTIES AND SATURATION
OF RESERVOIRS CONTAINING SUPERVISCOUS OILS APPLYING THE NMR METHOD (p. 68)

 

Maxim Ilvarovich Zagidullin,

Artem Gennadievich Potapov,

Eldar Salimchanovich Abdrakhmanov, Cand. of chem. sci.,

Evgeniy Nikolaevich Salomatin,

Yan Irekovich Gilmanov, Cand. of geol.-mineral. sci.

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: YIGilmanov@tnnc.rosneft.ru

 

The paper presents the results of laboratory studies that make it possible to increase the reliability of the assessment of weakly-consolidated reservoirs properties with extra viscous oils (EVO) located in the Samara region by introducing a correction for the hydrogen index to adjust the interpretation algorithms of the nuclear magnetic logging (NML). Petro-physical studies of the core were carried out by applying the NMR method, which makes it possible to determine the total porosity when the samples are saturated with various fluids. It is shown that the use of kerosene as a fluid of additional saturation of naturally-saturated core samples makes it possible to achieve a more complete filling of the pore space, in contrast to water, but at the same time, the T2 distribution curve is distorted. It was found that the use of a standard cutoff of 33 ms and a standard method for obtaining a cutoff T2gr. for rocks containing EVO, gives an overestimated value of residual water on the NMR curves. It should be noted that the studied core samples have a neutral and hydrophobic character of wettability according to the calculated wettability indices by the USBM method.

 

Keywords: porosity; wettability; nuclear magnetic logging; extra-viscous oil; petrophysical research.

 

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UDC 552.578.1:536          DOI: 10.30713/2413-5011-2020-10(346)-78-83

 

THE STUDY OF THERMAL HEAT CAPACITY OF LIQUID HYDROCARBONS OF BEREGOVOYE DEPOSIT BY THE METHOD OF DIFFERENTIAL SCANNING CALORIMETRY (p. 78)

 

Sergey Anatolyevich Zanochuev,

Anton Vladimirovich Polyakov,

Tatiana Sergeevna Ponomareva

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: sazanochuev@tnnc.rosneft.ru, avpolyakov31@tnnc.rosneft.ru, tsponomareva@tnnc.rosneft.ru

 

Production and processing planning of formation gas condensate is an important step of increasing the economic efficiency of gas condensate field development projects. Reliability of technological process and equipment calculations directly depends on the availability, completeness and accuracy of information on hydrocarbons thermal-physical properties. The authors of the paper, applying the method of differential scanning calorimetry, theoretically and experimentally studied the specific isobaric heat capacity of gas condensates and oil of the Pokur formation of the Beregovoye deposit. The error of the measurements was determined by comparing the measured and reference values of the heat capacity of pure substances. The accuracy of the heat capacity measurements was ± 2,0 % with reliability of 0,95. The fluid studies were conducted in the temperature range from +5 up to +45 °C. One can notice a phase transition for hydrocarbon systems containing oil components within the studied temperature range associated with the formation of solid paraffin structures. The paper reveals correlation relationships of physical-chemical characteristics and isobaric heat capacity of condensates.

 

Keywords: liquid hydrocarbons; heat capacity; calorimetry; gas condensate deposits.

 

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UDC 622.276.031:550.822.3          DOI: 10.30713/2413-5011-2020-10(346)-84-92

 

SPECIALIZED LABORATORY CORE STUDIES FOR SOLVING THE PROBLEMS
OF DRILLING, HYDRAULIC FRACTURING OF A FORMATION
AND DEVELOPMENT OF OIL AND GAS FIELDS (p. 84)

 

Mikhail Dmitrievich Subbotin,

Valeriy Anatolievich Pavlov, Cand. of tech. sci.,

Dmitriy Olegovich Korolev,

Alexander Sergeevich Yakubovsky,

Alexey Yurievich Kudymov

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: mdsubbotin@tnnc.rosneft.ru

 

Mikhail Ivanovich Samoilov

 

LLC "Rosneft–Center of Expert Support and Technical Development"

7b, office 502, Odesskaya str., Tyumen, 625023, Russian Federation

 

Currently, geomechanical modeling demonstrates broad possibilities when solving problems both of the purposes of drilling processes optimization and a hydraulic fracturing of a formation (HFF) and the purposes of optimization of an oil and gas field development.

From the point of view of optimization of drilling and hydraulic fracturing processes, a standard well-known complex of core studies is used to determine the elastic-strength properties of rocks. However, the tasks associated with the optimization of a field development include a whole range of solutions with the need to conduct unique experiments in order to address each specific problem, whether it is an increased removal of mechanical impurities or premature watering during a well operation, etc.

The Core research center (CRC) of LLC "TNNC", together with the geomechanical modeling group, developed and tested the following laboratory core research methods: determination of the Biot coefficient, assessment of the anisotropy of the rocks’ elastic-strength properties, determination of the effect of the saturating fluid change on the elastic-strength properties rocks, as well as an estimation of a safe pressure drop to minimize the risk of mechanical impurities removal.

The proposed methods have been successfully tested on engineering projects and introduced into production both at the stage of a field development planning and for fields in the late stages of development.

The full-scale involvement of such types of research and their replication will significantly expand the areas of geomechanical modeling application in the field of drilling, hydraulic fracturing and optimization of oil and gas fields development.

 

Keywords: geomechanics; elastic and strength properties; anisotropy of elastic and strength properties; Biot coefficient; influence of saturation fluid on elastic-strength properties; hollow (thick-walled) cylinder; safe pressure drop.

 

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UDC 006.91(622.276+622.279)          DOI: 10.30713/2413-5011-2020-10(346)-93-98

 

INFORMATION SYSTEM "RN-LAB" AS A TOOL FOR OPTIMIZING THE ACTIVITIES
OF THE METROLOGICAL SERVICE (p. 93)

 

Sergey Stanislavovich Magdenko,

Daniil Igorevich Zhilin,

Irina Aleksandrovna Vakhrusheva,

Dmitriy Rimovich Khamitov

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: ssmagdenko@tnnc.rosneft.ru, dizhilin@tnnc.rosneft.ru, IAVahrusheva@tnnc.rosneft.ru, drkhamitov@tnnc.rosneft.ru

 

This paper considers the possibility of optimizing the activities of the Metrological service specialists of the Center for core and formation fluids research thanks to the "QMS" module of the "RN-Lab" information system. A description of the module functionality for the automation of routine operations performed by metrologists in the course of their activities is presented.

 

Keywords: metrology; core study; reduction in labor costs; automation.

 

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UDC 622.276.031.011.431.3          DOI: 10.30713/2413-5011-2020-10(346)-99-105

 

THE EFFECT OF WETTABILITY ON THE RESISTIVITY OF WATER-SATURATED
AND OIL-WATER-SATURATED ROCKS IN THE ATMOSPHERIC
AND THERMOBARIC RESERVOIR CONDITIONS (p. 99)

 

Roman Sergeevich Shulga,

Evgeniy Nikolaevich Salomatin,

Irina Vladimirovna Novosadova

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation

 

The paper presents the results of laboratory studies of rocks electrical properties on a collection of samples selected from the Sortymskaya suite by studying the resistivity of water-saturated and oil-water-saturated rocks under atmospheric and temperature-pressure conditions before and after the restoration of wettability. The authors of the paper developed dependencies, based on the results of the analysis of which it can be concluded that the n exponent of the Archie – Dakhnov equation significantly depends on the wettability. Based on the data obtained, when studying hydrophobic rocks, it is recommended to measure the resistivity during natural saturation or with the wettability restoration.

 

Keywords: wettability; water saturation; core study; specific electrical resistance of the rock.

 

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UDC 622.276.1/.4.001.57          DOI: 10.30713/2413-5011-2020-10(346)-106-111

 

IMPROVED METHOD OF ANALOGUES-OBJECTS SELECTION WHEN DESIGNING
OIL AND GAS FIELDS DEVELOPMENT BY USING CASE-BASED REASONING (p. 106)

 

Dmitriy Vladislavovich Nikiforov

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation,

e-mail: dvnikiforov2@tnnc.rosneft.ru

 

Igor Nikolaevich Glukhikh

 

Tyumen State University

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

 

The paper considers a case-based reasoning (CBR) method as a decision-making tool for the design of oil and gas field development by analogue object searching. The current engineering practice involves a vaguely formalized method of analogues, which does not allow defining the object as much as possible authentically the analogue, thus causing errors in the course of designing. The analogue object serves as a source of ready-made near-optimal design solutions and additional information about the object under study. The paper presents the upgrade of the tool for finding analogue objects which on the basis of the CBR method. An idea of the object of development as a precedent and a procedure of extracting precedents from the database has been changed. All changes are expounded in a new conceptual scheme, which, being implemented like an information system, will allow accounting for the different level of precedents self-descriptiveness, up-to-dateness of the information about precedents, which are saved in the database, and to accelerate a procedure of extracting precedents from the database. The principal novelty is the fact that the presented conceptual scheme, presented in the paper, allows taking into consideration the up-to-dateness of the information about precedents and design solutions.

 

Keywords: case-based reasoning; CBR; analogue techniques; decision making support system; expert system; intelligent system; case extracting; modeling of oil and gas fields; design of oil and gas fields development.

 

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UDC 622.276.1/.4.001.57          DOI: 10.30713/2413-5011-2020-10(346)-112-118

 

THE INFLUENCE OF METHODOLOGICAL APPROACHES TO TIGHT SANDSTONES MODELING
ON THE ESTIMATION ACCURACY OF HYDROCARBONS PRODUCTION LEVELS (p. 112)

 

Maxim Alexandrovich Starikov,

Vadim Leonidovich Kiselev,

Vitaliy Nikolaevich Arkhipov,

Dmitriy Vyacheslavovich Grandov,

Yuriy Nurmukhametovich Utyashev,

Alexander Alexandrovich Evdoshchuk

 

LLC "Tyumen Petroleum Research Center"

42, Maxim Gorky str., Tyumen, 625048, Russian Federation

 

The complexity of the geological structure of the hydrocarbon deposits in Krasnoyarsk Territory, being mainly at the initial stage of commercial development, is determined by their facial variability, as well as by the presence of a significant number of carbonated interlayers – "blocks" in the productive section. The presence of such intervals significantly increases the heterogeneity of the formation, affects the pressure distribution and the direction of filtration flows. For this reason, their correct mathematical modeling is a fundamentally important aspect that ensures the reliability of technological indicators prediction. The authors of the article, based on the example of one of the large fields of the Vankor cluster, evaluate the impact of methodological approaches to modeling tight sandstones on the quality of production levels prediction and the process of choosing the optimal density of the wells network.

 

Keywords: geological modeling; sedimentary environment; facies; carbonated sandstone; tight sandstone; hydrodynamic model (hereinafter HDM); adaptation of the HDM.

 

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