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The Fractured Permian Reservoir and Its Significance in the Gas Exploitation in the Sichuan Basin, China

Author

Listed:
  • Xin Luo

    (Chongqing Division, PetroChina Southwest Oil & Gasfield Company, Chongqing 400707, China)

  • Siqi Chen

    (Chongqing Division, PetroChina Southwest Oil & Gasfield Company, Chongqing 400707, China)

  • Jiawei Liu

    (School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China)

  • Fei Li

    (PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China)

  • Liang Feng

    (Chongqing Division, PetroChina Southwest Oil & Gasfield Company, Chongqing 400707, China)

  • Siyao Li

    (School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China)

  • Yonghong Wu

    (Chongqing Division, PetroChina Southwest Oil & Gasfield Company, Chongqing 400707, China)

  • Guanghui Wu

    (School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China)

  • Bin Luo

    (Chongqing Division, PetroChina Southwest Oil & Gasfield Company, Chongqing 400707, China
    PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China)

Abstract

Large gas reserves have been found in the Permian platform margin of the Kaijiang-Liangping area of the Sichuan Basin in SW China. They are assumed to be a widely developed reef–shoal reservoir. However, the tight matrix reservoir cannot support high gas production using conventional development technology at deep subsurface. In this contribution, we analyze the fractured reservoirs along the strike-slip fault zones using the compiled data of cores, well logging, and production data, and provide a seismic description. It was shown that the fractures and their dissolution developed along the strike-slip fault zones. The porosity and permeability of the fractured reservoir could increase by more than one and 1–2 orders of magnitude, respectively. The seismic anisotropic energy found in the steerable pyramid process suggests that fractured reservoirs have a strong heterogeneity, with a localized fault damage zone. This fracturing has both positive and negative effects, showing varied reservoir parameters in the fault damage zone. The development pattern should adopt a non-uniform well pattern, in order to target the localized “sweet spot” of the fractures in these deep tight matrix reservoirs.

Suggested Citation

  • Xin Luo & Siqi Chen & Jiawei Liu & Fei Li & Liang Feng & Siyao Li & Yonghong Wu & Guanghui Wu & Bin Luo, 2023. "The Fractured Permian Reservoir and Its Significance in the Gas Exploitation in the Sichuan Basin, China," Energies, MDPI, vol. 16(4), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1968-:d:1070725
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    References listed on IDEAS

    as
    1. Guoping Liu & Lianbo Zeng & Chunyuan Han & Mehdi Ostadhassan & Wenya Lyu & Qiqi Wang & Jiangwei Zhu & Fengxiang Hou, 2020. "Natural Fractures in Carbonate Basement Reservoirs of the Jizhong Sub-Basin, Bohai Bay Basin, China: Key Aspects Favoring Oil Production," Energies, MDPI, vol. 13(18), pages 1-23, September.
    2. Ali Shafiei & Mohammad Ali Ahmadi & Maurice B. Dusseault & Ali Elkamel & Sohrab Zendehboudi & Ioannis Chatzis, 2018. "Data Analytics Techniques for Performance Prediction of Steamflooding in Naturally Fractured Carbonate Reservoirs," Energies, MDPI, vol. 11(2), pages 1-29, January.
    3. Xiao He & Guian Guo & Qingsong Tang & Guanghui Wu & Wei Xu & Bingshan Ma & Tianjun Huang & Weizhen Tian, 2022. "The Advances and Challenges of the Ediacaran Fractured Reservoir Development in the Central Sichuan Basin, China," Energies, MDPI, vol. 15(21), pages 1-14, November.
    4. Yahua Yang & Xingyao Yin & Bo Zhang & Danping Cao & Gang Gao, 2021. "Linearized Frequency-Dependent Reflection Coefficient and Attenuated Anisotropic Characteristics of Q-VTI Model," Energies, MDPI, vol. 14(24), pages 1-18, December.
    5. Qingsong Tang & Shuhang Tang & Bing Luo & Xin Luo & Liang Feng & Siyao Li & Guanghui Wu, 2022. "Seismic Description of Deep Strike-Slip Fault Damage Zone by Steerable Pyramid Method in the Sichuan Basin, China," Energies, MDPI, vol. 15(21), pages 1-13, October.
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