Linear zones of increased oil producti vity in the carbonate reservoir of the Pushkarskoe area of Zimne-Stavkinsko-Pravoberezhnoye field
https://doi.org/10.37493/2308-4758.2022.3.2
Abstract
Introduction. The object of research is the carbonate deposit of the Neftekumsk suite of the Zimne-Stavkinsko-Pravoberezhnoye field (Pushkarskoye area), confined to the Lower Triassic deposits of the Eastern Stavropol. The purpose of the research is to increase the efficiency of oil field development based on the identification of zones of increased well productivity. To achieve this goal, the following tasks are supposed to be solved: assessment of the influence of tectonic and geodynamic factors; identification of zones of increased productivity of wells associated with a system of fractures accompanying zones of tectonic stresses discharge.
Materials and methods of research. The materials included geological and field data on oil deposits (including well productivity), geophysical surveys of more than 200 deep wells, seismic data, satellite images of various scales, seismicgeological profiles, structural maps, isopach maps of effective oil saturated thicknesses, maps of current and cumulative recoveries and other materials of scientific and industrial enterprises. The following research methods were used: analysis, systematization and generalization of geological, geophysical and field data, the system-aerospace method, including the classical technology of interpretation of space images. The methodology developed by the authors for identifying zones of increased productivity of wells in carbonate deposits was used, taking into account satellite imagery interpretation data.
Results and discussion. The analysis of zones of increased productivity of wells is given. It is established that these zones are predominantly linear in nature, and the linearity of the cumulative oil production does not depend on the time of putting the wells into operation. Structural factor, effective oil pay thickness, height above the contact, open porosity, oil saturation, specific oil reserves of the formation are not the determining factors of linearity. Based on the analysis of the geotectonic activity of the studied region, the influence of the geodynamic factor on well productivity was considered and it was revealed that zones of increased fracturing, which cause an increase in well productivity, are the result of tectonic stresses discharge. The established pattern of confinement of the directions of linear zones of increased fracturing is observed not only for carbonate Neftekumsk deposits, but also for terrigenous deposits in the upper part of the field crosssection.
Conclusion. This methodology has been developed for identifying zones of increased fracturing and increased productivity of wells in the carbonate deposits of the Neftekumsk suite, due to the discharge of tectonic stresses, according to the directions of the lineaments of the day surface. The results of the research can be used to issue recommendations for identifying promising additional exploration objects for infill drilling and carrying out geological and technological measures to increase the recoverability of residual reserves.
About the Authors
K. I. ChernenkoRussian Federation
Chernenko Katerina Igorevna, Senior lecturer of Chair of Geology of Oil and Gas
Stavropol
Scopus ID: 57216909166
Researcher ID: AEA-6877-2022
Phone: +7 (918) 880-20-80
kabiso@rambler.ru
N. V. Yeriomina
Russian Federation
Yeriomina Natalia Vladimirovna, Candidate of Geologic-Mineralogical Sciences, associate professor of Chair of geology of oil and gas
Stavropol
Scopus ID: 57216908112
Researcher ID: FFL-9679-2022
Phone: +7 (905) 462-93-76
Ye. Yu. Tumanova
Russian Federation
Tumanova Yelena Yurievna, Candidate of Geologic-Mineralogical Sciences, associate professor, Head of Chair of Geology of Oil and Gas
Stavropol
Scopus ID57216909521
Researcher ID: GOV-4268-2022
Phone: +7 (962) 740-31-55
References
1. Mollaev Z.Kh., Nelepov M.V. Search for hydrocarbon deposits in the Eastern Stavropol based on the concept of the block structure of the sedimentary cover // Geology, Geophysics and Development of Oil and Gas Fields. M.: JSC «VNIIOENG », 2004. No. 7. P. 21–22.
2. Nelepov M., Gridin R., Lutsenko O., Sterlenko Z., Tumanova Ye., Yeriomina N., Chernenko K., Gridin V. Fracture modeling of carbonate reservoirs of Low Triassic Neftekumsk formation of hydrocarbon field in Petrel software // EMMFT-2020: E3S Web of Conferences, 2021. 244. 03020. ttps://doi.org/10.1051/e3sconf/202124403020.
3. Nelepov M.V. Linear structures in the saved-up oil production of the Velichayevsko-Kolodeznoye field of Stavropol region // Neftyanoe khozyaystvo, 2015. №. 9 (1104). P. 96–97.
4. Lebedinets N.P. Study and development of oil fields with fractured reservoirs. M.: Science, 1997. 396 p.
5. Bagrintseva K.I. Carbonate rocks – oil-and-gas reservoirs. M.: Nedra, 1977. 231 p.
6. Guidelines for the identification and evaluation of complex carbonate reservoirs in the Lower Triassic and Paleozoic deposits of the Stavropol Territory, South Mangyshlak using the methods of field geophysics (RD 39-4-544-81). Grozny: SKTB PG, 1981. 120 p.
7. Nechay A.M. Study of fractured reservoirs using field geophysics methods // Exploration geophysics. 1969. No. 36. P. 111–126.
8. Kopylov N.T., Turtukov G.Ya., Savelyeva L.M. Methodology for exploration of oil deposits in the sediments of the transitional complex of the Eastern Fore-Caucasus // Prospects for the oil-and-gas content of the transitional complex of young platforms. 1985. P. 123–137.
9. Stasenkov V.V., Letavin A.I., Kopylov N.T., Savelyeva L.M., Sharafutdinov F.G., Mirzoev D.A. Prospects for the search for lithological-stratigraphic deposits of oil and gas in the Permian- Triassic deposits of the Eastern Fore-Caucasus // Geology of oil and gas, 1983. No. 5. P. 23-–27.
10. Henning P., Allwardt P., Paul P., Zahm Ch., Reid R., Alley H., Kirschner R., Lee B., Hough E. Relationship between fractures, fault zones, stress, and reservoir productivity in the Suban gas field, Sumatra, Indonesia // AAPG Bulletin, 2012. 96. P. 753-772. DOI:10.1306/08161109084.
11. Nelepov M.V., Tomashev D.V., Paporotnaya A.A. Impact of the natural fractures studies on the oil fields production efficiency program for Eastern Stavropol region // Neftepromislovoe Delo, 2019. No. 7(607). P. 28–33. DOI:10.30713/0207-2351-2019-7(607)-28-32.
12. Nelepov S.V., Ilchenko P.V., Nelepov M.V. Analysis of the degree of influence of geological factors on the amount of accumulated hydrocarbon production // Gas industry, 2015. №. 3. P. 19–22.
13. Chernenko K.I., Nelepov M.V., Eremina N.V. Construction of a digital geological model of an oil deposit in the conditions of a lack of information about the parameters of fracturing using interpretation data // Magazine Neftegaz.RU, 2021. №. 8 (116). P. 36–40.
14. Gorbachev S.V., Syryamkin V.I. Neuro-fuzzy methods in intelligent systems of processing and analysis of multidimensional information. Tomsk: Tomsk State University. 2014. P. 276–337.
15. Kharchenko V.M., Lapta D.V., Nerkararyan A.E. Integrated Remote and Geophysical Methods for Searching Deposits of Hydrocarbons (Territory of the Central Caucasus) // Science. Innovation. Technologies, 2019. No. 4. P. 33–48.
16. Tomashev D.V. The structure of the natural oil reservoir in the Lower Triassic deposits (Neftekumsk suite) of the Eastern Stavropol region according to hydrodynamic studies // Bulletin of the North-Caucasus State Technical University, 2012. №. 3 (32). P. 96–100.
17. Letavin A.I., Orel S.M., Chernyshev et al. Tectonics and oiland- gas potential of the North Caucasus. Moscow: Science, 1987. 94 p.
18. Korchuganova N.I., Korsakov A.K. Distant methods of geological mapping: textbook. Moscow: KDU, 2009. 288 p.
19. Golovanov M.P., Drozdov V.V. Experience of lineament analysis in Ciscaucasia // Space information when searching, exploration and operation of gas fields: results and prospects of using. Moscow: Proceedings of VNIIGAZ, 1987. P. 61–68.
Review
For citations:
Chernenko K.I., Yeriomina N.V., Tumanova Ye.Yu. Linear zones of increased oil producti vity in the carbonate reservoir of the Pushkarskoe area of Zimne-Stavkinsko-Pravoberezhnoye field. Science. Innovations. Technologies. 2022;(3):29-46. (In Russ.) https://doi.org/10.37493/2308-4758.2022.3.2