The article proposes possible options for the development of technologies of geological study and extraction of hard-to-recover reserves of the A. Usotsev oil field. Possible versions of models and systems for the development of complex structures of hard-to-recover reserves of the Achimov formation and the Neocomian complex are considered. The approaches of petrophysical substantiation for determining the absolute permeability of reservoirs are described. Nonlinear correlation relations between low and ultra-low permeability and porosity coefficients are obtained. The results of a detailed correlation of the well sections of the A. Usoltsev field by sequential paleoprofiling revealed the prerequisites for the beginning of a gradual immersion of individual tectonic blocks. Differentiation of deposits into large tectonic blocks, which, in turn, are subdivided into a series of small ones, as evidenced by the block change in the thicknesses of the Vasyugan formation deposits within the adjacent structures within the A. Usotsev field. Analyzing the change in the thicknesses of the Achimov formation throughout the field, we can say that there was a compensation of the total thicknesses of the Bazhenov formation and its anomalous section at the expense of increasing the thickness of the Achimov deposits. The presence of intense tectonic movements during the formation of deposits of the anomalous section of the Bazhenov formation and the Achimov strata indicates the need for a detailed analysis of the territory. A brief description of technologies for developing hart-to-recover reseves of the Achimov formation is given. The parameters of the main object of development are given and the approaches used in its operation are described. At the present stage of the object study, horizontal wells with multi-zone hydraulic fracturing show a higher efficiency. The results of research based on the supercritical state of fluids and gas micro nuclei are considered as a promising direction in the creation of innovative technologies.
References
1. Aref'ev S.V., Razrabotka modeli geologicheskogo stroeniya achimovskoy tolshchi v severo-zapadnoy chasti Nizhnevartovskogo svoda (Development of a model of the geological structure of the Achimov stratum in the northwestern part of the Nizhnevartovsk arch): thesis of candidate of geological and mineralogical science, Tomsk, 2008.
2. Gutman I.S., Aref'ev S.V. et al., Zapadno-Sibirskaya neftegazonosnaya provintsiya (West Siberian oil and gas province), In: Korrelyatsiya razrezov skvazhin slozhnopostroennykh ob"ektov i geologicheskaya interpretatsiya ee rezul'tatov (Correlation of well sections of complex objects and geological interpretation of its results), Moscow: Publ. of ESOEN, 2022, pp. 146–172.
3. Aref'ev S.V., Sokolov I.S., Pavlov M.S. et al., Implementation of horizontal wells with multistage hydraulic fracturing for low-permeability oil reservoir development (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2022, no. 9, pp. 90–95, DOI: https://doi.org/10.24887/0028-2448-2022-9-90-95
4. Shpurov I.V., Syr'evaya baza i trudnoizvlekaemye zapasy Rossii i Zapadnoy Sibiri (Raw material base and hard-to-recover reserves of Russia and Western Siberia), Proceedings of VI International Innovation Forum and Exhibition “NEFT''GAZTEK”, Tyumen, 16-17 September 2015.
5. Gutman I.S., Aref'ev S.V., Obgol'ts A.A., Fedoseeva E.N., Features of the block structure of the Bazhenov-Achimov complex rocks on the example of the Nong-Eganskoye field (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2022, no. 7, pp. 70-75, DOI: https://doi.org/10.24887/0028-2448-2022-7-136-139
6. Gutman I.S., Aref'ev S.V., Mitina A.I., Methods of detailed correlation of well sections in the study of the geological structure of Upper Jurassic and Lower Cretaceous rock complexes on the example of the Tevlinsko-Russkinskoye oil fields of the Surgut arch. Part 2. Substantiating the formation features of the Lower Cretaceous Sortym formation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2020, no. 10, pp. 25–29, DOI: https://doi.org/10.24887/0028-2448-2020-10-25-29
7. Ob utverzhdenii Poryadka opredeleniya pokazateley pronitsaemosti i effektivnoy neftenasyshchennoy tolshchiny plasta po zalezhi uglevodorodnogo syr'ya (On approval of the procedure for determining the indicators of permeability and effective oil-saturated thickness of the reservoir for hydrocarbon deposits), URL: https://normativ.kontur.ru/document?moduleId=1&documentId=240130&ysclid=lbkoapehlf639798602
8. Aref'ev S.V., Sokolov I.S., Fufaev S.A., Rozbaev D.A., Evaluation of the efficiency of the implemented development system at the facilities with oil rim of the oil and gas condensate field (In Russ.), Burenie i neft', 2022, no. 7, pp. 42–48.
9. Shakhverdiev A.Kh., Aref'ev S.V., Davydov A.V., Problems of transformation of hydrocarbon reserves into an unprofitable technogenic hard-to-recover reserves category (In Russ), Neftyanoe khozyaystvo = Oil Industry, 2022, no. 4, pp. 38–43, DOI: https://doi.org/10.24887/0028-2448-2022-4-38-43
10. Shakhverdiev A.Kh., Mandrik I.E., Influence of technological features of hardly recoverable hydrocarbons reserves output on an oil-recovery ratio (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2007, no. 5, pp. 76–79.
11. Shakhverdiev A.Kh., Panakhov G.M., Abbasov E.M. et al., High efficiency EOR and IOR technology on in-situ CO2 generation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 5, pp. 90–95.
12. Bakhtiyarov S.I., Panakhov G.M., Shakhverdlyev A.Kh., Abbasov E.M., Polymer/surfactant effects on generated volume and pressure of CO2 in EOR technology, Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007, DOI:10.1115/FEDSM2007-37100
13. Shakhverdiev A.Kh., Panahov G.M., Renqi Jiang, Abbasov E.M., High efficiency in-situ CO2 generation technology: the method for improving oil recovery factor, Petroleum Science and Technology, 2022, DOI: 10.1080/10916466.2022.2157010
14. Bakhtiyarov S.I., Panakhov G.M., Shakhverdiev A.Kh., Abbasov E.M., Oil recovery by in-situ gas generation: Volume and pressure measurements, Proceedings of ASME fluids engineering division summer meeting 2006, FEDSM2006, 2006, 1, Symposia, pp. 1487-1492, DOI: 10.1115/FEDSM2006-98359.
