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Research on Rock Minerals and IP Response Characteristics of Shale Gas Reservoir in Sichuan Basin

Author

Listed:
  • Kui Xiang

    (Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China)

  • Liangjun Yan

    (Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China)

  • Gang Yu

    (Bureau of Geophysical Prospecting, China National Petroleum Corporation, Zhuozhou 100083, China)

  • Xinghao Wang

    (Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China)

  • Yuanyuan Luo

    (Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China)

Abstract

As a kind of clean energy, shale gas has attracted much attention, and the exploration and development potential of shale gas resources in the middle and deep layers is huge. However, due to the changeable geological and burial conditions, complex geophysical responses are formed. Therefore, studying the characteristics of reservoir rock minerals and their complex resistivity response characteristics is helpful to deepen the understanding of the electrical characteristics of shale gas reservoirs and provide theoretical basis and physical basis for exploration and development. The study is based on shale samples from the Longmaxi Formation to the Wufeng Formation of a shale gas well in southern Sichuan, China, and the mineral composition and complex resistivity of shale are measured. Through inversion of complex resistivity model, four IP parameters, namely zero-frequency resistivity, polarizability, time constant and frequency correlation coefficient, are extracted, and the relationship between mineral components of rock samples and IP parameters is analyzed. It is found that the polarizability gradually increases and the resistivity gradually decreases with the increase in borehole depth. With the increase in pyrite content, the polarization increases and the resistivity decreases. The corresponding relational model is established, and it is found that the polarizability is highly sensitive to the characteristic mineral pyrite, which provides more effective data support for the subsequent deep shale gas exploration.

Suggested Citation

  • Kui Xiang & Liangjun Yan & Gang Yu & Xinghao Wang & Yuanyuan Luo, 2022. "Research on Rock Minerals and IP Response Characteristics of Shale Gas Reservoir in Sichuan Basin," Energies, MDPI, vol. 15(17), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6439-:d:905757
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    References listed on IDEAS

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