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An Analysis for the Influences of Fracture Network System on Multi-Stage Fractured Horizontal Well Productivity in Shale Gas Reservoirs

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  • Deliang Zhang

    (PetroChina Southwest Oil & Gas Field Company, Chengdu 610000, Sichuan, China
    Petroleum Engineering College, Southwest Petroleum University, Chengdu 610500, Sichuan, China)

  • Yu Dai

    (PetroChina Southwest Oil & Gas Field Company, Chengdu 610000, Sichuan, China)

  • Xinhua Ma

    (PetroChina Southwest Oil & Gas Field Company, Chengdu 610000, Sichuan, China)

  • Liehui Zhang

    (Petroleum Engineering College, Southwest Petroleum University, Chengdu 610500, Sichuan, China)

  • Bing Zhong

    (PetroChina Southwest Oil & Gas Field Company, Chengdu 610000, Sichuan, China)

  • Jianfa Wu

    (PetroChina Southwest Oil & Gas Field Company, Chengdu 610000, Sichuan, China)

  • Zhengwu Tao

    (PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China)

Abstract

This paper presents two representative models to analyze the flow dynamic of multi-scale porous medium in hydraulic fractured horizontal shale gas wells. In this work, considering the characteristic mechanisms (multi-scale porous space, desorption and diffusion), flow equations in shale are established. After that, two representative models (discrete fracture model and dual-porosity model) are tailored to our issues. Solved by the control-volume finite element method (CVFEM), influences of fracture network system on productivity in shale reservoirs are analyzed in detail. Based on the analysis, the effects can be summarized as follow: at the beginning of production, high conductivity fracture network means more free gas could be produced; at the later part of production, high conductive fracture network can form a large low pressure region, which can not only stimulate the desorption of adsorbed gas, but also reduce the flow resistance to the well. Finally, the sensitivities of characteristic parameters in shale are discussed.

Suggested Citation

  • Deliang Zhang & Yu Dai & Xinhua Ma & Liehui Zhang & Bing Zhong & Jianfa Wu & Zhengwu Tao, 2018. "An Analysis for the Influences of Fracture Network System on Multi-Stage Fractured Horizontal Well Productivity in Shale Gas Reservoirs," Energies, MDPI, vol. 11(2), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:2:p:414-:d:131351
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    Citations

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    Cited by:

    1. Shi, Yu & Song, Xianzhi & Shen, Zhonghou & Wang, Gaosheng & Li, Xiaojiang & Zheng, Rui & Geng, Lidong & Li, Jiacheng & Zhang, Shikun, 2018. "Numerical investigation on heat extraction performance of a CO2 enhanced geothermal system with multilateral wells," Energy, Elsevier, vol. 163(C), pages 38-51.
    2. Jia Liu & Jianguo Wang & Chunfai Leung & Feng Gao, 2018. "A Fully Coupled Numerical Model for Microwave Heating Enhanced Shale Gas Recovery," Energies, MDPI, vol. 11(6), pages 1-28, June.
    3. Shi, Yu & Song, Xianzhi & Wang, Gaosheng & McLennan, John & Forbes, Bryan & Li, Xiaojiang & Li, Jiacheng, 2019. "Study on wellbore fluid flow and heat transfer of a multilateral-well CO2 enhanced geothermal system," Applied Energy, Elsevier, vol. 249(C), pages 14-27.
    4. Gang Hu & Guorong Wang & Liming Dai & Peng Zhang & Ming Li & Yukun Fu, 2018. "Sealing Failure Analysis on V-Shaped Sealing Rings of an Inserted Sealing Tool Used for Multistage Fracturing Processes," Energies, MDPI, vol. 11(6), pages 1-11, June.
    5. Jia Liu & Jianguo Wang & Chunfai Leung & Feng Gao, 2018. "A Multi-Parameter Optimization Model for the Evaluation of Shale Gas Recovery Enhancement," Energies, MDPI, vol. 11(3), pages 1-29, March.
    6. Jingxuan Zhang & Xiangjun Liu & Xiaochen Wei & Lixi Liang & Jian Xiong & Wei Li, 2019. "Uncertainty Analysis of Factors Influencing Stimulated Fracture Volume in Layered Formation," Energies, MDPI, vol. 12(23), pages 1-24, November.
    7. Liying Zhu & Guoqing Han & Wenqi Ke & Xingyuan Liang & Jingfei Tang & Jiacheng Dai, 2022. "A Numerical Multistage Fractured Horizontal Well Model Concerning Hilly-Terrain Well Trajectory in Shale Reservoirs with Natural Fractures," Energies, MDPI, vol. 15(5), pages 1-20, March.

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