Localization and further extraction of residual recoverable oil reserves in low-permeability sandstone reservoirs with chaotic oblique layering in a late-stage field: a case study of the Achimov sequence
https://doi.org/10.31660/0445-0108-2025-2-85-97
Abstract
Achimov sequence is characterized by high heterogeneity and low reservoir properties. Development of Achimov sequence occurs using horizontal wells with multistage hydraulic fracturing. Despite the adoption of advanced technologies, the oil recovery factor in these deposits ranges from 5% to 14%. As part of the article, we studied the localization’s process of residual recoverable oil reserves in low-permeability, macro-heterogeneous sandstones with chaotic layered structures in a late-stage field. We studied belonging of sandstones to the filtration-capacitance matrix of the reservoir and the current state of field development. In addition, we analyzed production well operation. As a result, we found areas with undeveloped reserves for infill drilling on the base of depositional environments and facies. We considered all these factors to adapt a hydrodynamic simulation model of a highly heterogeneous reservoir. We utilized this model to select the design system that is optimal in terms of technical and economic indicators.
About the Authors
T. K. Apasov
Industrial Uni-versity of Tyumen
Russian Federation
Russian Federation
Timergaley K. Apasov, Сandidate of Engineering, Associate Professor at the Department of Development and Operation of Oil and Gas Fields
Tyumen
A. G. Kudiiarov
Gazpromneft-Noyabrskneftegaz LLC
Russian Federation
Russian Federation
Aleksandr G. Kudiiarov, Project Manager for The Formation of Business Cases
Perm
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Review
For citations:
Apasov T.K., Kudiiarov A.G. Localization and further extraction of residual recoverable oil reserves in low-permeability sandstone reservoirs with chaotic oblique layering in a late-stage field: a case study of the Achimov sequence. Oil and Gas Studies. 2025;(2):85-97. (In Russ.) https://doi.org/10.31660/0445-0108-2025-2-85-97
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