Development strategy of pore-fractured low-permeability reservoirs of the Berezovskaya suite

UDK: 622.276.66СГ

DOI: 10.24887/0028-2448-2025-9-24-29

Key words: Berezovskaya suite, siliceous rocks, fractured reservoir, hydraulic fracturing (HF), cyclic geomechanical treatment, gas-dynamic impulse stimulation, development strategy

Authors: A.N. Kiselev (RN-Geology Research Development LLC, RF, Tyumen); A.O. Gordeev (RN-Geology Research Development LLC, RF, Tyumen); T.A. Abramov (RN-Geology Research Development LLC, RF, Tyumen); A.Sh. Ackerman (RN-Geology Research Development LLC, RF, Tyumen)

This paper examines the geological, technical, and economic aspects of developing pore-fractured low-permeability reservoirs of the Berezovskaya suite in Western Siberia. The key challenges of such reservoirs are identified, including low productivity, high heterogeneity of filtration properties, and weak hydraulic connectivity within the fracture system. A review of both international and domestic experience in inflow stimulation methods is presented, covering artificial fracturing techniques such as hydraulic fracturing (HF), directional unloading (georipping), gas-dynamic impulse stimulation, and cyclic geomechanical treatments. Based on the analysis of geological conditions and field test results, a development strategy is proposed that combines artificial fracturing techniques with HF (to generate extended «main» fractures). A typical economic evaluation demonstrates that the proposed strategy is the most preferable, as it ensures a faster payback of the associated costs. Particular attention is devoted to a core study program aimed at experimental validation of the methodology which is determination of critical drawdowns, assessment of permeability enhancement, and investigation of fracture formation mechanisms in water-sensitive rocks. The prospects for scaling this approach across the region and the key factors determining its success are discussed. The results of this research may be applied in planning pilot-industrial projects and in developing regulatory and technical frameworks for the development of hard-to-recover gas reserves of the Berezovskaya suite and similar reservoirs.

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