In the work the analysis of the frequency characteristics of the measuring channels of a dual-input control system, and general frequency characteristics on example a dual input control system of dynamic increment of torque. The article shows that in mode of quasiresonance, the imaginary component of the frequency function becomes zero. This leads to the exclusion of the amplitude-frequency and phase-frequency distortions in the measurement channel. The calculation of the logarithmic amplitude-frequency characteristics of the entire system in mode of quasiresonance showed a complete absence of frequency distortion in a dual-input control system of dynamic increment of torque. Considered experimental logarithmic amplitude-frequency and phase-frequency characteristics in the absence of quasiresonance and if it in one of the measurement channels. It is shown that at frequencies less than resonance, the phase shift and amplitude of frequency distortion have positive values, while at frequencies above resonance – negative. The article presents the results of tests of a prototype of a dual input control system parameters torque on experimental wells in the company «Eltech», Usinsk, Komi Republic.

Keywords: dual-input control system; quasiresonance; measuring channel; variational structure; frequency characteristics; frequency distortion.

References

1. B.A.Perminov, V.B.Perminov, Z.Kh.Yagubov, A.E.Lapin. Coordination of inertial properties of a variation pattern of torque moment gradient measurement with drilling control system //Construction of Oil and Gas Wells on-Land and off-Shore. – 2015. – No. 9. – P. 10-14.
2. B . A . P e r m i n o v , V . B . P e r m i n o v , Z . H . J a g u b o v , e t a l . F e a t u r e s me a s u r eme n t o f t o r q u e u s i n g variational structures //Oil Engineer. –2016. –No. 2. –P.38-42.
3. B.A.Perminov, V.B.Perminov, Z.H.Jagubov, I.A.Dement'ev, E.V.Teterevljova. Frequency distortions while the gradient of the torque variation patterns changes //Oil Engineer. –2016. –No. 1. –P. 33-39.
4. N.D.Tshadaya, В.А.Perminov, V.В.Perminov, et al. Frequency characteristics of a variational structure of measurer of a torgue //The International Science-Technical Journal HERALD of the Azerbaijan Engineering Academy. –2016. –Vol. 8. –№1. –P. 52-62.
5. В.А.Perminov, V.В.Perminov, Z.H.Yagubov, E.Z.Yagubov. Ratio of indicators in the system «drill string – drive» //The International Science-Technical Journal HERALD of the Azerbaijan Engineering Academy. -2016. -Vol. 8. -№ 3. -P. 63-73.
6. O . A . A b d u k a m a l o v , L . N . S e r e b r y a k o v a , A.R.Tastemirov. Experience of shock action for bottomhole zone treatment of injection wells in the fields of Western Kazakhstan //SOCAR Proceedings. –2017. –No. 1. –P. 62-65.
7. E.M.Abbasov, N.A.Agaeva. Propagation of the constructed of pressure waves in fluid with the account dynamic connection of system the well-formation //SOCAR Proceedings. –2014. –No. 1. – P.77-84.
8. Z.Kh.Jagubov, B.A.Perminov, V.B.Perminov, S.V.Poletaev. Method of drilling control, and system for its implementation. RU Patent № 2569656, 2015.

The article describes problems while construction of directional wells with horizontal ending on the Jurskiye deposits of the Koshilskoye field. It demonstrates effectiveness of modified biopolymer emulsion drilling mud. The proposed drilling mud has high rheological, lubricating and inhibiting properties, unique filtration and crust-forming characteristics, contributes to the preservation of the natural reservoir properties. Using the mud while drilling for liner allowes to minimize the risk of fluid loss and stuck pipe and provides for trouble-free drilling. 

Keywords: biopolymer emulsion drilling mud; complications; jurskiye deposits; Bazhenov suite; directional well with horizontal ending; liner.

References

1. Gruppovoy rabochiy proekt na stroitelstvo naklonno-napravlennyh ekspluatacionnyh skvazhin s gorizontalnym okonchaniem stvola po plastu YuV1 Koshilskogo mestorozhdeniya. Nizhnevartovsk: OOO
   «SIBTEHNOBURPROEKT», 2012.
2. V.P.Ovchinnikov, N.A.Aksenova. Burovye i promyvochnye rastvory. Uchebnoe posobie. Tyumen: Ekspress, 2011.
3. V.P.Ovchinnikov, R.A.Ismakov, A.V.Oganov i dr. Tehnologiya bureniya neftya-nyh i gazovyh skvazhin. Tyumen: TyumGNGU, 2017.
4. N.A.Aksenova, A.E.Anashkina, V.A.Fedorovskaya. Tehnologiya i tehnicheskie sredstva dlya vskrytiya produktivnyh plastov. Tyumen: TyumGNGU, 2015.
5. V.P.Ovchinnikov, N.A.Aksenova, O.V.Rozhkova, T.A.Grosheva. Sovremennye sostavy burovyh rastvorov. Tyumen: Ekspress, 2013.

The paper presents a scientific substantiation of improving enhanced gas recovery technology and current gas production from fields with low-permeable terrigenous reservoirs. In the results of physical and hydrodynamic modeling the regularities of adsorption-desorption processes in tight gas reservoirs were established and the impact of different well placing with interval hydraulic fracturing on the production flow rate and gas recovery factor was estimated. On the basis of this research the existing technologies of enhanced gas recovery from tight reservoirs could be improved, their technological and economic impacts on field performance were established and recommendations for implementation were given.

Keywords: tight reservoirs; desorption; gas recovery factor; hydraulic fracturing.

References

1. O.R.Kondrat, N.M.Hedzyk. Enhanced natural gas recovery from low-permeable reservoirs //Quarterly of AGH University of Science and Technology. –2016. – Vol.33(2). – P. 323-339.
2. O.R.Kondrat, N.M.Hedzyk. Optimization of the process of natural gas production stimulation from low permeable reservoirs //New Developments in Mining Engineering. Theoretical and Practical Solutions of Mineral Resources Mining. –2015. – P. 479-484.
3. O.R.Kondrat, N.M.Hedzyk. Study of adsorption processes influence on development of natural gas fields with low-permeability reservoirs //The "Prospecting and Development of Oil and Gas Fields" Journal. – 2014. –№4(53). –P. 7-17.
4. R.Aguilera. Flow units: from conventional to tight gas to shale gas reservoirs //Paper SPE-132845-MS presented at the Trinidad and Tobago Energy Resources Conference, Port of Spain, Trinidad, 27-30 June 2010.
5. C.L.Cipolla, E.P.Lolon, J.C.Erdle. Reservoir modeling in shale gas reservoirs //Paper SPE-125530-MS presented at the SPE Eastern Regional Meeting, Charleston, West Virginia, USA, 23-25 September 2009.
6. C.M.Freeman, G.J.Moridis, D.Ilk, T.A.Blasingame. A numerical study of performance for tight gas and shale gas reservoir systems //Paper SPE-124961-MS presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, 4-7 October 2009.
7. C.Gao, J.W.Lee, J.P.Spivey, M.E.Semmelbeck. Modeling multilayer gas reservoirs including sorption effects //Paper SPE-29173-MS presented at the SPE Eastern Regional Meeting, Charleston, West Virginia, 8-10 November 1994.
8. C.D.Pope, T.T.Palisch, E.P.Lolon, et al. Improving stimulation effectiveness-field results in the haynesville shale //Paper SPE-134165-MS presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19-22 September 2010.
9. J.A.Rushing, K.E.Newsham, T.A.Blasingame. Rock typing – key to understanding productivity in tight gas sands //Paper SPE-114164-MS presented at the SPE Unconventional Reservoirs Conference, Keystone, Colorado, USA, 10-12 February 2008.
10. H.S.Scott, S.Denis, R.Pierce. Enhanced coalbed methane recovery using CО₂ injection:worldwide resource and CО₂ sequestration potential //Paper SPE-48881-MS presented at the SPE International Oil and Gas Conference and Exhibition in China, Beijing, China, 2-6 November 1998.
11. S.A.Holditch. Tight gas sands //Journal of Petroleum Technology. – 2006. – Vol.58(6). – P. 86-94.
12. I.M.Indrupskiy, A.R.Kondrat, T.N.Tsagan-Mandzhiev. Estimation of non-pay natural gas reserves //Doklady Earth Sciences. – 2016. – Vol. 470(1). – P. 909-913.
13. D.-F.Zhao, Y.-H.Guo, C.-G.Xiang, et al. Simulation and history matching of a shale gas reservoir using different models in Eagle Ford basin //SOCAR Proceeding. – 2015. – № 1. – Р. 67-73.
14. B.-X.Xu, Y.-H.Bai, G.-H.Chen, R.-Y.Feng. The impact of engineering parameters on shale oil and gas
    production: theory and practice //SOCAR Proceeding. – 2015. – No. 2. – Р. 24-31.
15. N.H.Ha, H.H.Bui, T.D.Nguyen, et al. Development of a dual-porosity model for “Bach Ho” fractured basement reservoir //SOCAR Proceeding. – 2015. – No. 4. – Р. 12-20.
16. L.V.Skakalska. Forecasting physical and reservoir characteristics of reservoir formations for exploration of unconventional gas //SOCAR Proceeding. – 2014. – No. 1. – P. 4-10.
17. V.J.Abdullayev, M.A.Huseynov, M.M.Ismyilov, K.M.Nabiyev. 3D geological modeling of «Guneshli» reservoir for increasing final development stage efficiency //SOCAR Proceeding. – 2014. – No. 2. – P. 75-82.

New designs of downhole filters are developed and applied to prevent or limit mechanical impurities entry into the underground equipment. The new design gravel pack, proposed in the article, can be applied in wells, regardless of the operation mode or extracted products, comprising mechanical impurities. This paper gives the solution how to provide the maximum filter strength, increase effective life, distribute a comprehensive, uniform product inflow into the well and, if necessary, ensure full recovery of the equipment from the well. The installation of a downhole filter eliminates the risk of cement sheath damage in the casing annulus and limits sand entry, resulting in an increase in wells’ turnaround time, reduction in current and capital works, and an increase in well flow rate.

Keywords: borehole filter; mechanical impurities; formation fluid

References

1. R.J.Armentor, M.R.Wise, M.Bowman, et al. Regaining sand control //Oilfield Review. -2007. –Vol. 19. –No. 2. –P.4-17.
2. V.A.Bondarenko, O.V.Savenok. Research of methods and technologies management of complications, due to sand control //Mining Informational and Analytical Bulletin (Scientific and Technical Journal). –2014. – No. S5-1. –P. 3-27.
3. A.A.Hajiyev, E.K.Tolepbergenov. Field tests of new composition for stabilizing weak producing formation //SOCAR Proceedings. -2015. –No. 4. –P. 31-34.
4. E.М.Аbbasov. Determination of time of composite-base isolation plugging material washout from the formation //SOCAR Proceedings. -2015. -No. 1. –P. 27-28.
5. S.Kvernstuen, K.R.Dowling, J.S.Graham, et al. ICD screen technology in Stag Field to control sand and increase recovery by avoiding wormhole effect //Paper IPTC-12385-MS presented at the International Petroleum Technology Conference held in Kuala Lumpur, Malaysia, 3-5 December 2008.
6. Sh.P.Kazimov, Fariz Ahmed. Experience and prospects on application of well screen with inflow control device //SOCAR Proceedings. –2015. –No. 2. –P. 32-40
7. F.S.Ismailov, B.A.Suleimanov, Sh.P.Kyazymov, et al. Well strainer. EA patent № 024517, 2016.

The paper suggests a method for sand and mechanical impurities settling in a liquid flow, including a sand settler, which is installed prior to a production gathering and handling point directly on the infield pipeline, both on one well line and at branch connections. However, the developed sand settler is located at a distance determined by the proposed relationship. The design parameters of the sand settling device, which provide the most complete trapping of mechanical impurities as well, are determined based on the daily volume of liquid passing through the device by comparing parameters such as settling time of solids and the passage time of liquid with solid particles through the device. Since June 20, 2016, the tests of the developed device for sand settling were started on deep-water offshore platform No. 4 of Guneshli field, "28 May” OGPD.  In order to protect liquid -injection pumps against sand impact, the sand settler was installed on the on suction pipe of onshore field line of the 4th platform. 450 kg of sand was settled by the sand settler within the period from November 13, 2016 until November 21, 2016.

Keywords: mechanical impurities; infield pipeline; field equipment; production gathering and handling facilities; sand settler; particles settling rate; particle size; fluid discharge. 

References

1. N.V.Chuhareva, A.V.Rudachenko, A.V.Barhatov, D.V.Fedin. Transport skvazhinnoy produktsii. Tomsk: TPU, 2011.
2. Sh.P.Kazimov, E.S.Abdullayeva, N.M.Racabov. Structure of swelling packers and their applicability in the fields of Azerbaijan //SOCAR Proceedings. -2015. –No. 3. -P. 43-51.
3. N.A.Svarovskaya. Podgotovka transport i hranenie skvazhinnoy produktsii. Tomsk: TPU, 2004.
4. V.V. Shaidakov, S.F. Urmancheev, O.Yu. Poletaeva, et al. Mechanical impurities coagulation in liquid flow // Oilfield Engineering. - 2009. – No. 9. - P. 53-55.
5. V.V.Shaidakov, M.V.Musaev, K.V.Chernova i dr. Ustroystvo dlya koagulyatsii ferromagnitnyih chastits zhidkosti i gaza. Patent Rossiyskoy Federatsii No. 69859, 2008.
6. F.G.Gasanov, Sh.P.Kazimov, N.M.Radzhabov, E.S.Abdullaeva. Sposob ulavlivaniya mehanicheskih primesey v potoke plastovyih flyuidov. Zayavka No. 201700307/26 ot 13/04/2017 na poluchenie Evraziyskogo patenta na izobretenie. Uvedomlenie o polozhitelnom rezultate ot 28/08/2017.
7. F.Hasanov, N.Racabov, E.Abdullayeva. Medendaxili avadanliqlarin qumun tesirinden muhafize uchun qum chokdurucu qurqu //Israfil Quliyevin anadan olmasinin 100 illik yubileyine hesr olunmush «Deniz neft ve qaz yataqlarinin ishlenilmesinin aktual problemleri» movzusunda konfransin materiallari. Baki: ADNSU, 2017. - S. 121-128.
8. E.S.Abdullayeva. Mitigation of environmental damage aftereffects when operating an intra-field transportation system //Oilfield Engineering. -2017. -№ 9. -С.50-54.
9. A.G.Laptev, M.I.Farakhov. Separation of heterogeneous mixtures in packed apparatuses. Kazan: Kazan State Power Engineering University, 2006.
10. P.I.Pilov. Gravitatsionnaya separatsiya poleznyih iskopaemyih. Dnepropetrovsk: NGU, 2010.

The paper deals with laboratory-experimental studies of the effect of temperature of a working agent on the displacement coefficient of high-viscosity oil in conditions of the Karazhanbas oil field. According to the results of studies conducted by the laboratory center of JSC «KazNIPIMunaigas», it follows that an increase in the temperature of the working agent contributes to an increase in the displacement of oil, an increase in the oil displacement coefficient is noted for all lithotypes of the rocks. The dynamics of the displacement coefficient increases sharply as the temperature of the injected water rises from 50 °C and more. This is achieved due to a sharp decrease in the viscosity of oil (3 times) and increase its mobility, which is confirmed by the results of PVT studies of deep oil samples performed on 4 wells. Evaluation of the effect of mineralization on clay rocks showed that a decrease in mineralization negatively affects reservoir properties. A significant decrease in permeability with a decrease in the mineralization of injected water before complete desalination is associated with clay types: clays are represented by illites and smectites, which are highly prone to swelling. In the work on the basis of laboratory-experimental research, it is recommended to use hot water with a temperature in the range of 50-90 °C for an effective displacement of oil and to carry out an experimental industrial test.

Keywords: high viscosity oil; displacement coefficient; lithotypes of rocks; pvt study; mineralization; clay rocks; reservoir properties; permeability; laboratory-experimental research; oil displacement.

References

1. F.G.Arzhanov, D.G.Antoniadi, A.R.Garushev, et al. Thermal methods of impact on oil layers. Handbook. M. : Nedra, 1995.
2. V.I.Kudinov. Sovershenstvovanie teplovyih metodov razrabotki mestorozhdeniy vyisokovyazkih neftey. M.: Neft i gaz, 1996.
3. A.R.Garushev. Thermal treatment of reservoirs in the development of high-viscosity oil fields. Topical Scienceand-Technology Review in the “Oil Production” Series. M.: VNIIOENG, 1973.
4. Analiz razrabotki mestorozhdeniya «Karazhanbas» (po sostoyaniyu na 01/01/2015). Otchet AO «KazNIPImunaygaz» po dogovoru № 15-KGD1-0840 (reg. №83/15-n) ot 08/06/2015.
5. Otsenka perehoda ot zakachki para k zakachke podtovarnoy vodyi na opyitnom uchastke mestorozhdeniya Karazhanbas (po sostoyaniyu na 01/01/2015). Otchet AO «KazNIPImunaygaz» po dogovoru №15-KGD1-1212 (№115-15n) ot 19/10/2015.
6. Z.E.Bulekbaev, S.E.Votsalewski, B.A.Iskujiev, et al. Oil and gas Fields of Kazakhstan. Reference. M.: Nedra, 1996.
7. Analiz razrabotki mestorozhdeniya «Karazhanbas». Otchet po NIR AO «NIPIneftegaz», Aktau, 2005.
8. T.F.Tleubaeva, L.A.Popova, L.R.Belko. Podschet zapasov nefti, rastvorennogo gaza i poputnyih komponentov mestorozhdeniya «Karazhanbas» (Mangistauskoy oblasti Respubliki Kazahstan). Otchet po NIR po sostoyaniyu na 01/07/2007, AO «NIPIneftegaz», Aktau, 2008.
9. M.R.Sisenbayeva. Changes in formation oil viscosity in phase change area and effect of SAA «Karpatol-UM2KNurol » on bubble-point pressure //SOCAR Proceedings. –2015. –No.3. –P.21-26.
10. A.M.Hajiyev. Control and regulation ofreservoir development, characterized bydifferent environmental conditions //SOCAR Proceedings. –2014. –No.2. –Р.38-45.

The paper presents a mathematical model for calculation of dynamic loads, which force a rod column and plunger of sucker rod pump in inclined well during pumping the multiphase fluid consisting of water, oil and gas. The mathematical model accounts for forces of boundary friction of rods and tube surface and viscous friction of rods and moving gas-liquid flow in the tubes, parameters of multiphase flow inside the tubes and annulus and also a variable type of pressure under the plunger space, phase transition and hydraulic losses. Results of simulation are compared with field measurements.

Keywords: sucker rod pump; dynamogram; inclined well; boundary friction; dynamic load.

References

1. V.M.Kasyanov. Analytical method for control of downhole sucker rod pumps. M.: VNIIOENG, 1973.
2. I.A.Charniy, A.I.Freydenzon, C.T.Arustamova. Dinamicheskiy raschet shtang glubokih neftyanyh nasosov s uchetom sil treniya o nasosnye truby //Izvestiya AN SSSR. OTN. –1949. –T.6. –C.855-875.
3. M.M.Hasanov, M.D.Valeev, K.R.Urazakov. O haraktere kolebaniy davleniya zhidkosti v NKT glubinnonasosnyh skvazhin //Izvestiya VUZov. Seriya «Neft i Gaz». –1991. –№11. –S.32-36.
4. A.Kh.Mirzadzhanzade, M.M.Khasanov, R.N.Bakhtizin. Studies on the modeling of complex systems of oil production. Nonlinearity, disequilibrium, heterogeneity. Ufa: Gilem, 1999.
5. V.D.Kovshov, S.V.Svetlakova, M.E.Sidorov. The dynamometer card of well pumping unit modeling //Oil Industry. –2005. –No.11. –P.84-88
6. K.R.Urazakov, V.V.Dmitriev, G.B.Agamalov. Model shtangovoy kolonny dlya naklonno napravlennoy skvazhiny //Trudy 3-ey Mezhdunarodnoy prakticheskoy konferencii i vystavki «Mehanizirovannaya dobycha - 2006». Moskva: 2006.
7. K.R.Urazakov, R.N.Bakhtizin, S.F.Ismagilov, A.S.Topolnikov. Theoretical dynamometer card calculation taking into account complications in the sucker rod pump operation //Oil Industry. –2014. –No. 1. –P. 90-93.
8. K.R.Urazakov, V.A.Molchanova, A.S.Topolnikov. Matematicheskaya model shtangovoy ustanovki s ezhektorom dlya otkachki gaza iz zatrubnogo prostranstva //Interval. –2007. –№6(101). –S.54-60.
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The paper demonstrates that the hydrophilic behavior of productive formations is primarily determined by water retaining capacity. Especially it concerns carbonaceous reservoirs characterized by lack or lon gel cement. In terrigenous reservoirs the water retaining capacity is greatly affected by variability of gel cement mineral composition. In (unchanged) permanent mineral composition of interstitial clay there may present correlational relationship between hydrophilic behavior and water retaining capacity of a productive reservoir.

Keywords: hydrophilic behavior; water retaining capacity; productive reservoir; reservoir properties.

References

1. A.V.Andreev, V.Sh.Mukhametshin, Yu.A.Kotenev. Deposit productivity forecast in carbonate reservoirs with hard to recover reserves //SOCAR Procеedings. –2016. –No. 3. –P. 40-45.
2. Yu.V.Zeigman, V.Sh.Mukhametshin, A.R.Khafizov, S.B.Kharina. Prospects of application of multi-functional well killing fluids in carbonate reservoirs //SOCAR Procеedings. –2016. –No. 3. –P. 33-39.
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4. N.Sh.Khayredinov, V.E.Andreev, K.M.Fedorov et al. Enhanced oil recovery methods application for major oil and gas territories geological-technological study and forecasting: training manual. Ufa: USPTU, 1997.
5. V.V.Mukhametshin, V.E.Andreev, G.S.Dubinsky, et al. The usage of principles of system geologicaltechnological forecasting in the justification of the recovery methods //SOCAR Proceedings. –2016. –No.3. –P. 46-51.
6. R.R.Kadyrov, R.Kh.Nizaev, A.F.Yartiev, V.V.Mukhametshin. A novel water shut-off technique for horizontal wells at fields with hard-to-recover oil reserves //Oil industry. –2017. –No.5. –P. 44-47.
7. R.T.Akhmetov, V.V.Mukhametshin, A.V.Andreev. Residual oil saturation and the displacement factor prediction methodology based on geophysical studies data to evaluate efficiency of nanotechnologies application. Nanotehnologii v stroitel’stve //Nanotechnologies in Construction. 2017, Vol. 9, no. 5, P. 116–133
8. V.V.Mukhametshin. The need for creation of a unified comprehensive method of geological and field analysis and integration of data on effective influence on the bottom-hole formation zone //Oil industry. –2017. –No 4. –P. 80-84.
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11. R.T.Akhmetov. Dumbbell-like model of vacuum space of oil and gas natural reservoirs //Geology, Geophysics and Development of Oil and Fas Fields. –2011. –No. 5. –P. 31-35.
12. V.V.Mukhametshin. Eliminating uncertainties in solving bottom hole zone stimulation tasks //Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering. -2017. -No. 7. -P. 40-50.
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14. N.N.Mikhailov, N.A.Semenova, L.S.Sechina. The conditions of microstructure wetting forming and their influence on filtration-measurement characteristics of productive strata //Georesources, geoenergetics, geopolitics. –2010. –Issue 1. –P. 30-31.
15. A.M.Hajiyev. Control and regulation of reservoir development, characterized by different environmental conditions //SOCAR Proceedings. –2014. –No. 2. –P. 38-45.

By analyse results of complex of geological-geophysical and geochemical studying of kura and gabirri interfluves it was revealed that, oil-gas source rock of maykop deposits was subsided in different: continental, deltaic, shallow and deep marine conditions. Organic matter substance in crossection of this deposits changes between from 0.02 to 2.14%. Geothermic gradient of upper part of maykop deposits, shows on low maturity level of organic matter on the studied region. Despite of it, conducted studies shows that, in low part of maykop deposits and Eocene deposits there are subsiding probability of shale HC. By the study results it is possible to come to conclusion that, deposits of the 3000-5000 m depth interval, passed the main oil-gaz formation window. At the same time low permeability and fracturing of Eocene and maykop deposits positively influenced on subsiding and preservation processes of shale HC.

Keywords: geology; tectonics; paleotectonics; lithology; litophase; stratigraphy; structure; paleostructure; raising; basin; sedimentation; deposit; hydrocarbon; trap; organic matter; oil-gaz mining; clay; shale; perpective; paleogen-miosen; maykop.

References

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The work presents a substantiation of the need for the introduction of computer microtomography (µ-CT) into a set of standard core studies to refine the facies conditions of reservoir rocks formation. The object of the study was the rocks of the Ju₂ layer (Tyumen formation) from well № 47 of the Urnenskoye oil field (West Siberian oil and gas basin). Core samples with a diameter of 8 mm were analyzed using the X-ray microtomography method. The study consisted of a structural analysis of tomographic sections and the correlation of geological-geophysical, textural-structural and lithologic-facies data. The relationship between the data of microtomography and the results of geological and geophysical studies has been revealed. Analysis of these materials allows to isolate in the delta channel the sediments of three subtypes of sediments, identified with sedimentary sub-microfacies. The pore space structure of Ju2 layer reservoir rocks was studied. It was concluded that it is necessary to use the results of computer microtomography during the facial analysis of terrigenous sediments of the West Siberian sedimentary megabasin and the construction of three-dimensional geological models.

Keywords: computer microtomography; core; sedimentation; facies analysis; spectrometric modification of gamma-ray logging on a core; sedimentary facies; sub-microfacies; petrophysical studies; reservoir rocks.

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