On inclusion of high-watered reserves of oil-poor reservoirs in the category of hard-to-recover reserves

UDK: 622.276.1/.4.038.004.14

DOI: 10.24887/0028-2448-2023-4-34-39

Key words: unprofitable hard-to-recover reserves, oil recovery, waterflooding, DNA logging, DNA sequencing, undersaturated oil reservoirs, enhanced oil recovery (EOR), improved oil recovery (IOR)

Authors: A.Kh. Shakhverdiev (Sergo Ordzhonikidze Russian State University for Geological Prospecting, RF, Moscow), S.V. Arefiev (LUKOIL-Western Siberia LLC, RF, Kogalym), A.S. Pozdyshev (Geonom LLC, RF, Moscow), R.R. Ilyazov (Sergo Ordzhonikidze Russian State University for Geological Prospecting, RF, Moscow)

The article deals with current problems of developing fields with unprofitable hard-to-recover reserves of liquid and gaseous hydrocarbons in oil-poor reservoirs. It proposes a new concept of unprofitable hard-to-recover oil reserves, a new solution for predicting water breakthrough and prevention of its consequences in conditions of unstable displacement front and under oil-saturated reservoirs. The expediency of creating innovative technologies of EOR and IOR for the effective development of under-saturated oil reservoirs and their successful application at development sites is shown, which requires tax preferences for the creators of scientific and technical products and oil producing companies. We offer an analysis of innovative technologies, including rheogasochemical technology based on the generation of carbon dioxide in reservoir conditions, as well as technology of DNA sequencing of reservoir biota at the early stage of drilling out and development object development, studied in the laboratory and pilot tested at specific sites of development. Thus, it is shown that the development of unprofitable natural and man-made unprofitable hard-to-recover oil reserves is an urgent, in-demand and long-term task, the solution of which requires a scientific systematic approach that ensures coordination of geological, technological, economic and regulatory parameters and indicators to justify the choice of objects falling under the benefits and to assess the expected economic effect. References 1. 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