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Numerical Simulation of Embedded Discrete-Fracture Seepage in Deep Carbonate Gas Reservoir

Author

Listed:
  • Yufeng Gong

    (Energy College, Chengdu University of Technology, Chengdu 610059, China)

  • Shuo Zhai

    (Energy College, Chengdu University of Technology, Chengdu 610059, China)

  • Yuqiang Zha

    (China National Offshore Oil Corporation (CNOOC) Ltd., Zhanjiang 524057, China)

  • Tonghao Xu

    (Chengdu Huarun Gas Engineering Co., Ltd., Chengdu 610045, China)

  • Shu Liu

    (Energy College, Chengdu University of Technology, Chengdu 610059, China)

  • Bo Kang

    (Chengdu North Petroleum Exploration and Development Technology Co., Ltd., Chengdu 610059, China)

  • Bolin Zhang

    (Chengdu North Petroleum Exploration and Development Technology Co., Ltd., Chengdu 610059, China)

Abstract

Existing fractured gas reservoir development techniques are mainly based on dual medium numerical-simulation models, which can, to a certain extent, effectively simulate natural fractures with high fracture density; however, these models have some limitations, particularly in terms of simulating the fracture morphology and distribution. Considering carbonate gas reservoirs with complex fractures, in this paper, we establish a numerical-simulation model of embedded discrete-fracture seepage in horizontal wells of carbonate gas reservoirs, in order to compare and study the development effect of carbonate gas reservoirs under different horizontal well fracture parameters. The fracture distribution and structure in carbonate gas reservoirs is obtained using an ant-tracking approach based on 3D seismic bodies, and a numerical-simulation model based on the embedded discrete-fractures model is solved using the open-source program MRST. We considered the following parameters: half fracture length, fracture permeability, and horizontal segment length. By changing the fracture parameters of horizontal wells and comparing the gas-production trends, technical optimization in gas reservoir development can be realized. The results show that the embedded discrete-fracture model can effectively solve the difficult problem of characterizing fluid seepage in fractures of different scale in carbonate gas reservoirs. Although gas production increases with increasing fracture length, fracture conductivity, horizontal section length, and natural fracture conductivity, the contributions of these parameters to gas well production capacity are greatly influenced by the natural fractures.

Suggested Citation

  • Yufeng Gong & Shuo Zhai & Yuqiang Zha & Tonghao Xu & Shu Liu & Bo Kang & Bolin Zhang, 2022. "Numerical Simulation of Embedded Discrete-Fracture Seepage in Deep Carbonate Gas Reservoir," Energies, MDPI, vol. 15(19), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7237-:d:931645
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    References listed on IDEAS

    as
    1. Shengchun Xiong & Siyu Liu & Dingwei Weng & Rui Shen & Jiayi Yu & Xuemei Yan & Ying He & Shasha Chu, 2022. "A Fractional Step Method to Solve Productivity Model of Horizontal Wells Based on Heterogeneous Structure of Fracture Network," Energies, MDPI, vol. 15(11), pages 1-26, May.
    2. Xijun Ke & Yunxiang Zhao & Jiaqi Li & Zixi Guo & Yunwei Kang, 2022. "Production Simulation of Oil Reservoirs with Complex Fracture Network Using Numerical Simulation," Energies, MDPI, vol. 15(11), pages 1-17, May.
    3. Yueying Wang & Jun Yao & Zhaoqin Huang, 2022. "Parameter Effect Analysis of Non-Darcy Flow and a Method for Choosing a Fluid Flow Equation in Fractured Karstic Carbonate Reservoirs," Energies, MDPI, vol. 15(10), pages 1-21, May.
    4. Yong Hu & Jiong Wei & Tao Li & Weiwei Zhu & Wenbo Gong & Dong Hui & Moran Wang, 2022. "Numerical Simulation of Fluid Flow in Carbonate Rocks Based on Digital Rock Technology," Energies, MDPI, vol. 15(10), pages 1-26, May.
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