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Investigation of the Impact of Natural Fracture Geomechanics on the Efficiency of Oil Production and CO 2 Injection from/to a Petroleum Structure: A Case Study

Author

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  • Wiesław Szott

    (Oil and Gas Institute-National Research Institute, 25A Lubicz Str., 31-503 Cracow, Poland)

  • Piotr Ruciński

    (Oil and Gas Institute-National Research Institute, 25A Lubicz Str., 31-503 Cracow, Poland)

  • Małgorzata Słota-Valim

    (Oil and Gas Institute-National Research Institute, 25A Lubicz Str., 31-503 Cracow, Poland)

  • Krzysztof Sowiżdżał

    (Oil and Gas Institute-National Research Institute, 25A Lubicz Str., 31-503 Cracow, Poland)

Abstract

The paper addresses the problem of geomechanical effects in the vicinity of production/injection wells and their impacts on the processes of enhanced oil recovery by CO 2 injection and CO 2 sequestration in a partially depleted oil reservoir. In particular, it focuses on natural fracture systems and their dynamics caused by variations in the rock geomechanical state due to reservoir pressure changes during production/injection processes. The comprehensive approach to the problem requires the combined modeling of both geomechanical and flow phenomena associated with effective coupling simulations of their evolution. The paper applies such an approach to a real, partially depleted oil reservoir in Poland. An effective method of coupled geomechanical and dynamic simulations was used together with the natural boundary and initial conditions for both simulation types. In addition, typical operating conditions were applied in analyzing the processes of enhanced oil recovery by CO 2 injection and CO 2 sequestration. The detailed results of relevant modeling and simulations are presented and discussed focusing on various scale consequences, including the reservoir, well, and completion ones. Both general conclusions as well as the ones specific to the analyzed geological structure are drawn; they confirm the significant dependence of well performance on geomechanical effects and point out several key factors for this dependence. The conclusions specific to the analyzed structure concern fracture reactivation in tensile/hybrid failure mode caused by pressure build-up during CO 2 injection and the importance of the fracture-induced aperture changes resulting from the normal stress, while the shear stress is found to be negligible.

Suggested Citation

  • Wiesław Szott & Piotr Ruciński & Małgorzata Słota-Valim & Krzysztof Sowiżdżał, 2023. "Investigation of the Impact of Natural Fracture Geomechanics on the Efficiency of Oil Production and CO 2 Injection from/to a Petroleum Structure: A Case Study," Energies, MDPI, vol. 16(10), pages 1-35, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:10:p:4219-:d:1151729
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    References listed on IDEAS

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    1. Liu, Yueliang & Rui, Zhenhua & Yang, Tao & Dindoruk, Birol, 2022. "Using propanol as an additive to CO2 for improving CO2 utilization and storage in oil reservoirs," Applied Energy, Elsevier, vol. 311(C).
    2. Małgorzata Słota-Valim & Andrzej Gołąbek & Wiesław Szott & Krzysztof Sowiżdżał, 2021. "Analysis of Caprock Tightness for CO 2 Enhanced Oil Recovery and Sequestration: Case Study of a Depleted Oil and Gas Reservoir in Dolomite, Poland," Energies, MDPI, vol. 14(11), pages 1-32, May.
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