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Multi-Well Pressure Interference and Gas Channeling Control in W Shale Gas Reservoir Based on Numerical Simulation

Author

Listed:
  • Jianliang Xu

    (CNPC Chuanqing Drilling Engineering Co., Ltd., Chengdu 610051, China)

  • Yingjie Xu

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
    Shale Gas Research Institute, PetroChina Southwest Oil & Gas Field Company, Chengdu 610051, China)

  • Yong Wang

    (CNPC Chuanqing Drilling Engineering Co., Ltd., Chengdu 610051, China)

  • Yong Tang

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China)

Abstract

Well interference has drawn great attention in the development of shale gas reservoirs. In the W shale gas reservoir, well interference increased from 27% to 63% between 2016 and 2019, but the gas production recovery of parent wells was only about 40% between 2018 and 2019. Therefore, the mechanism and influencing factor of well interference degree were analyzed in this study. A numerical model of the W shale gas reservoir was developed for history matching, and the mechanisms of well interference and production recovery were analyzed. Sensitivity analysis about the effect of different parameters on well interference was carried out. Furthermore, the feasibility and effectiveness of gas injection pressure boosting to prevent interference were demonstrated. The results show that the main causes of inter-well interference are: the reservoir energy of the parent well before hydraulic fractures of the child well, well spacing, the fracture connection, etc. The fracture could open under high pressure causing fracturing fluid to flow in, while fracture closure happens under low pressure and the influence on the two-phase seepage in the fracture becomes more serious. The combination of liquid phase retention and fracture closure comprehensively affects the gas phase flow capacity in fractures. Gas injection pressure boosting can effectively prevent fracturing fluids flowing through connected fractures. Before the child well hydraulic fracturing, gas injection and pressurization in the parent well could reduce the stress difference and decrease the degree of well interference. The field case indicates that gas channeling could be effectively prevented through parent well gas injection pressurization.

Suggested Citation

  • Jianliang Xu & Yingjie Xu & Yong Wang & Yong Tang, 2022. "Multi-Well Pressure Interference and Gas Channeling Control in W Shale Gas Reservoir Based on Numerical Simulation," Energies, MDPI, vol. 16(1), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:16:y:2022:i:1:p:261-:d:1015816
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    References listed on IDEAS

    as
    1. Cheng Chang & Yongming Li & Xiaoping Li & Chuxi Liu & Mauricio Fiallos-Torres & Wei Yu, 2020. "Effect of Complex Natural Fractures on Economic Well Spacing Optimization in Shale Gas Reservoir with Gas-Water Two-Phase Flow," Energies, MDPI, vol. 13(11), pages 1-21, June.
    2. Dapeng Gao & Yuewu Liu & Daigang Wang & Guofeng Han, 2019. "Numerical Analysis of Transient Pressure Behaviors with Shale Gas MFHWs Interference," Energies, MDPI, vol. 12(2), pages 1-21, January.
    3. Lixia Kang & Wei Guo & Xiaowei Zhang & Yuyang Liu & Zhaoyuan Shao, 2022. "Differentiation and Prediction of Shale Gas Production in Horizontal Wells: A Case Study of the Weiyuan Shale Gas Field, China," Energies, MDPI, vol. 15(17), pages 1-13, August.
    4. Tao Huang & Xin Liao & Zhaoqin Huang & Fuquan Song & Renyi Wang, 2022. "Numerical Simulation of Well Type Optimization in Tridimensional Development of Multi-Layer Shale Gas Reservoir," Energies, MDPI, vol. 15(18), pages 1-20, September.
    5. Cheng Chang & Chuxi Liu & Yongming Li & Xiaoping Li & Wei Yu & Jijun Miao & Kamy Sepehrnoori, 2020. "A Novel Optimization Workflow Coupling Statistics-Based Methods to Determine Optimal Well Spacing and Economics in Shale Gas Reservoir with Complex Natural Fractures," Energies, MDPI, vol. 13(15), pages 1-24, August.
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