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The Study on Diagenetic Characteristics of Coal Measures Sandstone Reservoir in Xishanyao Formation, Southern Margin of the Junggar Basin

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  • Aobo Zhang

    (School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China)

  • Shida Chen

    (School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China)

  • Dazhen Tang

    (School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China)

  • Shuling Tang

    (School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China)

  • Taiyuan Zhang

    (School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China)

  • Yifan Pu

    (School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    Coal Reservoir Laboratory of National Engineering Research Center of Coalbed Methane Development & Utilization, Beijing 100083, China)

  • Bin Sun

    (Unconventional Research Institute, Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

Abstract

The reservoir physical properties, pore types, diagenetic characteristics and reservoir quality controlling effect of the Xishanyao formation coal measure sandstone in the southern margin of the Junggar basin were discussed in this study based on thin section observation, high pressure mercury injection, low-temperature nitrogen adsorption and scanning electron microscope observation. The result shows that the porosity and permeability of the sandstone are generally low with a medium-high texture maturity and low compositional maturity. The sandstone storage space is mainly composed of residual intergranular pores, secondary dissolution pores, inter-crystalline pores and micro-fractures. The diagenetic stage of coal measure sandstone is in the mesodiagenesis A1-A2 stage, and their diagenetic interaction types mainly include compaction, cementation and dissolution. The reservoir quality of the coal measure sandstone deteriorates by compaction due to high matrix content and plastic debris content. Because of the large amounts of organic acids generated during the thermal evolution of the coal measure source rock, the coal measure sandstone suffers from strong dissolution. The secondary dissolution pores formed by the massive dissolution of feldspar, lithic fragments and early carbonate cementation in the sandstone significantly improved the reservoir quality. In the coal measure sandstone, clay mineral cementation is the most developed cementation form, followed by quartz cementation and carbonate cementation. Although kaolinite cementation and dolomite cementation can generate a small number of inter-crystalline pores, cementation deteriorates the reservoir quality. The Xishanyao formation coal measure sandstone formed in a lacustrine-delta environment, and its composition and texture make it susceptible to the influence of compaction and dissolution during diagenesis.

Suggested Citation

  • Aobo Zhang & Shida Chen & Dazhen Tang & Shuling Tang & Taiyuan Zhang & Yifan Pu & Bin Sun, 2022. "The Study on Diagenetic Characteristics of Coal Measures Sandstone Reservoir in Xishanyao Formation, Southern Margin of the Junggar Basin," Energies, MDPI, vol. 15(15), pages 1-24, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5499-:d:875359
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    References listed on IDEAS

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    1. Tianqi Zhou & Chaodong Wu & Xutong Guan & Jialin Wang & Wen Zhu & Bo Yuan, 2021. "Effect of Diagenetic Evolution and Hydrocarbon Charging on the Reservoir-Forming Process of the Jurassic Tight Sandstone in the Southern Junggar Basin, NW China," Energies, MDPI, vol. 14(23), pages 1-27, November.
    2. Yue Zhang & Jingchun Tian & Xiang Zhang & Jian Li & Qingshao Liang & Xiaoyu Zheng, 2022. "Diagenesis Evolution and Pore Types in Tight Sandstone of Shanxi Formation Reservoir in Hangjinqi Area, Ordos Basin, Northern China," Energies, MDPI, vol. 15(2), pages 1-16, January.
    3. Shaochun Yang & Ya Wang & Shiqi Zhang & Yongchao Wang & Yifan Zhang & Yongfu Zhao, 2020. "Controls on Reservoirs Quality of the Upper Jurassic Mengyin Formation Sandstones in Dongying Depression, Bohai Bay Basin, Eastern China," Energies, MDPI, vol. 13(3), pages 1-21, February.
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    Cited by:

    1. Wenguang Tian & Suping Zhao & Fenghua Tian & Xingtao Li & Wanguo Huo & Guanghao Zhong & Song Li, 2023. "Symbiotic Combination and Accumulation of Coal Measure Gas in the Daning–Jixian Block, Eastern Margin of Ordos Basin, China," Energies, MDPI, vol. 16(4), pages 1-15, February.

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