Results of pilot projects on the implementation of advanced approaches to the development of low-permeability reservoirs at Rosneft Oil Company

UDK: 622.276.66СГ

DOI: 10.24887/0028-2448-2026-4-50-57

Key words: reservoir management, hard-to-recover reserves, low- permeability reservoirs, multistage hydraulic fracturing, horizontal wells with transverse and longitudinal hydraulic fractures, low-viscosity fracturing fluids

Authors: A.M. Sadykov (RN-TECHNOLOGIES LLC, RF, Moscow); A.A. Gayazov (RN-TECHNOLOGIES LLC, RF, Moscow); A.E. Fedorov (RN-TECHNOLOGIES LLC, RF, Moscow); A.A. Mironenko (RN-TECHNOLOGIES LLC, RF, Moscow); S.A. Erastov (RN-TECHNOLOGIES LLC, RF, Moscow); M.S. Antonov (RN-TECHNOLOGIES LLC, RF, Moscow); D.A. Kravets (RN-Yuganskneftegaz LLC, RF, Nefteyugansk); S.V. Valeev (RN-Yuganskneftegaz LLC, RF, Nefteyugansk); K.M. Parovinchak (Rosneft Oil Company, RF, Moscow); A.V. Sergeychev (Rosneft Oil Company, RF, Moscow)

This article is a summary of articles devoted to the search for optimal solutions for the development of reservoirs with low permeability using the example of the Erginsky license area, which is a testing ground for pilot industrial works to improve the efficiency of hard-to-recover reserves (HRR) production. The drilling of the horizontal well (HW) stock across the direction of propagation of the maximum regional stress for the development of transverse fractures proved to be more effective than the basic system of developing HW with longitudinal fractures of multi-stage hydraulic fracturing (HF) for low- permeability reservoirs. Based on geomechanical modeling and refinement of the fracture geometry in the HF simulator, a strategy for conducting pilot projects using various HF designs (six technologies at the first stage) was determined. According to the pilot test results, high-tech wells with an increased share of low-viscosity fluids showed an increase in productivity and cumulative production compared to standard large-volume HF with high-viscosity cross-linked guar-borate gel. The potential of using only low-viscosity fluids with an alternative fracturing job schedule with reduced proppant mass and increased fluid volume is noted. The article describes the results of changing the reservoir development strategy to increase the profitability of involving HRR in development. The influence of the HW orientation for the development of transverse fractures, various HF designs and the number of stages on the increase in cumulative production and well productivity is studied; studies of the interference of transverse fractures and microseismic monitoring of multi-stage HF are presented.

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