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An Efficient Numerical Model for the Evaluation of the Productivity Considering Depletion-Induced Plastic Behaviors in Weakly Consolidated Reservoirs

Author

Listed:
  • Feifei Luo

    (Research Institute of Exploration and Development, CNPC Xinjiang Oilfield Company, Karamay 834000, China)

  • Lei Zhong

    (Research Institute of Exploration and Development, CNPC Xinjiang Oilfield Company, Karamay 834000, China)

  • Zhizhong Wang

    (Research Institute of Exploration and Development, CNPC Xinjiang Oilfield Company, Karamay 834000, China)

  • Zixuan Li

    (Changqing Petroleum Engineering Supervision Company Limited, CNPC Chuanqing Drilling Engineering Company Limited, Xi’an 710018, China)

  • Bolong Zhu

    (Department of Petroleum Engineering, China University of Petroleum—Beijing at Karamay, Karamay 834000, China
    College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China)

  • Xiangyun Zhao

    (Department of Petroleum Engineering, China University of Petroleum—Beijing at Karamay, Karamay 834000, China
    College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China)

  • Xuyang Guo

    (Department of Petroleum Engineering, China University of Petroleum—Beijing at Karamay, Karamay 834000, China
    College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China)

  • Jiaying Lin

    (Research Institute of Exploration and Development, CNPC Xinjiang Oilfield Company, Karamay 834000, China)

Abstract

Efficient and accurate modeling of rock deformation and well production in weakly consolidated reservoirs requires reliable and accurate reservoir modeling techniques. During hydrocarbon production, the reservoir pressure is dropped, and rock compaction is induced. In such depletion-induced reservoir rock deformation, both elastic and plastic deformation can be generated. The numerical investigation of depletion-induced plasticity in shale oil reservoirs and its impact on coupled reservoir modeling helps provide insights into the optimization of horizontal well productivity. This study introduces a coupled flow and geomechanical model that considers porous media flow, elastoplastic deformation, horizontal well production, and the coupling between the flow and geomechanical processes. Simulation results are then provided along with numerical modeling parameters. Effects of relevant parameters, including depletion magnitude, rock mechanical properties, and hydraulic fracture parameters, jointly affect rock deformation, rock skeleton damage, and horizontal well productivity. Depletion-induced plasticity, stress, pressure, and subsidence are all characterized by the solution strategy. In addition, the implementation of direct and iterative solvers and the usage of full coupling and sequential coupling strategies are investigated, and the associated solver performance is quantified. It helps evaluate the numerical efficiency in the highly nonlinear numerical system. This study provides an efficient coupled flow and elastoplastic model for the simulation of depletion in weakly consolidated reservoirs.

Suggested Citation

  • Feifei Luo & Lei Zhong & Zhizhong Wang & Zixuan Li & Bolong Zhu & Xiangyun Zhao & Xuyang Guo & Jiaying Lin, 2025. "An Efficient Numerical Model for the Evaluation of the Productivity Considering Depletion-Induced Plastic Behaviors in Weakly Consolidated Reservoirs," Energies, MDPI, vol. 18(4), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:4:p:892-:d:1590174
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    References listed on IDEAS

    as
    1. Tang, Jizhou & Zhang, Min & Guo, Xuyang & Geng, Jianhua & Li, Yuwei, 2024. "Investigation of creep and transport mechanisms of CO2 fracturing within natural gas hydrates," Energy, Elsevier, vol. 300(C).
    Full references (including those not matched with items on IDEAS)

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