The article considers the adaptation of methodological approaches to the application of non-stationary waterflooding to the conditions of a carbonate object of one of the fields of the Nenets Autonomous Okrug of the Arkhangelsk Region. Non-stationary waterflooding is a hydrodynamic method of increasing oil recovery, the advantages of which are simplicity of implementation in a short time, applicability in a wide range of reservoir conditions and high technological efficiency. For the most effective design and implementation of cyclical waterflooding, a target-focused approach is proposed, which includes the following methods: tracer analysis, analysis of well interference by statistical analysis methods and analysis of the reaction of producing wells to stops/starts of injection wells. Based on the proposed target approach, stagnant zones have been identified, and prospective areas have been formed for conducting a waterflooding. Waterflooding at the selected area was carried out in 2023. The technological efficiency of the work program was assessed by an extrapolation method using displacement characteristics. Additional oil production due to non-stationary flooding for the area as a whole as of 01.01.2024 amounted to 4822 tons, or 3 % of the total area production; reduction in associated water withdrawals – 1635 tons. A target-focused approach to selecting an area for non-stationary waterflooding ensures maximum technological development indicators with minimum economic costs.
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URL: https://ogbus.ru/files/ogbus/authors/Lyalin/Lyalin_1.pdf
