Determination of the optimal time for re-fracturing in low-permeability reservoirs with abnormally high reservoir pressure

UDK: 622.276.66.013

DOI: 10.24887/0028-2448-2025-11-42-45

Key words: hydraulic fracturing, low-permeability reservoirs, abnormally high reservoir pressure, optimal time

Authors: K.A. Kharlamov (ROSPAN INTERNATIONAL JSC, RF, Novy Urengoy; Ufa State Petroleum Technological University, RF, Ufa); Yu.A. Zakharzhevskiy (ROSPAN INTERNATIONAL JSC, RF, Novy Urengoy); D.V. Savchuk (ROSPAN INTERNATIONAL JSC, RF, Novy Urengoy); P.N. Stetsyuk (ROSPAN INTERNATIONAL JSC, RF, Novy Urengoy); D.V. Korokhovoy (ROSPAN INTERNATIONAL JSC, RF, Novy Urengoy); V.O. Safronov (Rosneft Oil Company, RF, Moscow); D.K. Sagitov (Ufa State Petroleum

Since 2013, Rosneft Oil Company has been developing the low-permeability Urengoy gas condensate field in the Yamalo-Nenets Autonomous District. The development of low-permeability reservoirs without creating a system of artificial cracks is currently unprofitable. In the presence of abnormally high reservoir pressure, the development of low-permeability reservoirs becomes more complicated, the permeability and conductivity of the created crack decrease, and the proppant indentation increases compared to a similar low-permeability reservoir without abnormally high reservoir pressure. This shall lead to the need for secondary hydraulic fracturing under conditions of changed reservoir pressure. Currently, there are a large number of techniques and tools that enable to select candidates for geological and technical actions, including hydraulic fracturing, there is high-tech software that enables to simulate hydraulic fracturing designs, and digital services are being developed for planning, preparing and conducting hydraulic fracturing. Rosneft Oil Company pays attention to further improving the planning processes and application of hydraulic fracturing technology. The article considers an approach to determining the optimal time for re-hydraulic fracturing on low-permeability reservoirs, which shall maximize the effect of secondary hydraulic fracturing. Using the example of the actual data of a well operating at a low-permeability facility with an abnormally high reservoir pressure, the optimal time for re-hydraulic fracturing is calculated.

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