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Characteristics of Typical Shale Reservoir Development and Its Gas-Bearing Influencing Factors

  • INNOVATIVE TECHNOLOGIES OF OIL AND GAS
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Chemistry and Technology of Fuels and Oils Aims and scope

The Longmaxi Formation in the Sichuan Basin is a hotspot formation for shale gas exploration. In this paper, taking the Longmaxi Formation shale in Yuxi area as an example, a large number of TOC tests, X-diffraction whole-rock mineral fraction tests, electron microscope observations, physical properties, gas content, and CT scanning experiments were carried out, which in turn analyzed the characteristics of the shale gas reservoir and the factors influencing the gas content. The results of the study show that there are seven types of shale facies developed in Yuxi area, which are organic-rich siliceous shale facies (I), organic-rich carbonate-siliceous shale facies (II), organic-rich clayey shale facies (III), organic-poor clayey shale facies (IV), organic-poor carbonate-siliceous shale facies (V), organic-poor siliceous shale facies (VI), and organic-poor siliceous-carbonate shale facies (VII). The microstructural characteristics of the shale reflect that it was disturbed by multiple environmental factors at the time of deposition, and the sources of brittle minerals include both terrestrial clasts and biogenic siliciclastics. The bottom 30 m shale of Longmaxi Formation has good physical properties and gas content, which is a high-quality target section for shale gas exploration and development. TOC, Ro, permeability, quartz content and clay mineral content all have a significant effect on shale gas content and are important control factors for shale gas content.

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Acknowledgements

This work was supported by the Science and Technology Research Program of the Chongqing Municipal Education Commission (Grant No. KJZD-K202103201) and the Natural Science Foundation of Chongqing (Grants No. cstc2021jcyj-msxmX0959 and cstc2021jcyj-msxmX0771).

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Authors and Affiliations

  1. School of Architecture and Engineering, Chongqing Industry Polytechnic College, Chongqing, China

    Weiwei Jiao, Yang Huang, Lei Wen & Ping Guo

  2. Chongqing Shale Gas Exploration and Development Co., Ltd, Chongqing, China

    Haijie Zhang

  3. Chongqing Institute of Geology and Mineral Resources, Chongqing, China

    Ye Zhang

  4. Artificial Intelligence Research Institute, China University of Mining and Technology, Xuzhou, China

    Difei Zhao

  5. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, China

    Jiaming Zhang

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  1. Weiwei Jiao
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Correspondence to Weiwei Jiao.

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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 1, pp. 100–108, January–February, 2024.

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Jiao, W., Huang, Y., Zhang, H. et al. Characteristics of Typical Shale Reservoir Development and Its Gas-Bearing Influencing Factors. Chem Technol Fuels Oils 60, 132–141 (2024). https://doi.org/10.1007/s10553-024-01664-3

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