Lithologic Reservoirs ›› 2024, Vol. 36 ›› Issue (2): 147-159.doi: 10.12108/yxyqc.20240214

• PETROLEUM EXPLORATION • Previous Articles    

Sandbody superimposition patterns and oil and gas exploration significance of Permian Shanxi Formation in Daniudi gas field，Ordos Basin

LEI Tao1, MO Songyu2, LI Xiaohui1, JIANG Nan2,3, ZHU Chaobin2, WANG Qiao2, QU Xuejiao2,3, WANG Jia2,3   

  1. 1. Research Institute of Exploration and Development, North China Oil & Gas Branch Company, Sinopec, Zhengzhou 450006, China;
    2. School of Petroleum Engineering, Chongqing University of Science and Technology, Chongqing 401331, China;
    3. Chongqing Key Laboratory of Complex Oil and Gas Field Exploration and Development, Chongqing 401331, China
  • Received:2023-02-02 Revised:2023-02-28 Published:2024-03-06

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Abstract: The reservoir configuration of fluvial facies sand bodies is of great significance for the distribution of high-quality tight sandstone reservoirs in tight sandstone and natural gas development. Through field geological profiles and drilling cores observation，combined with logging and core analysis testing data，the sand body con‐figuration elements，stacking patterns and oil and gas development significance of tight sandstones of Permian Shanxi Formation in Da 12 well area of Daniudi gas field in Ordos Basin were studied. The results show that：（1）The Permian Shanxi Formation in the study area developed six-level composite braided flow zones and five-level single braided flow zone，the single braided flow zone includes river bed（distributary channel）and river diffuse，the mid-channel bar contains three-level accretion bodies and siltation layers.（2）The four-level floodplain deposits in the five-level single braided flow zone of braided river delta plain are more developed than the river diffuse in the braided river，and the siltation layer in the mid-channel bar is less developed.（3）The sand bodies in the single braided flow zone of the braided river in Shan 2-2 sub-member of Shanxi Formation are continuously deposited in a pattern of“channel to mid-channel bar”，with undeveloped shale and high degree of sand body stacking （mostly in composite stacking），good connectivity，and many high-quality reservoirs.（4）In the delta plain deposits of Shan 1 member and Shan 2-1 sub-member of Shanxi Formation，the river channels in the west have good connectivity，and the sand bodies are mainly composite and side-jointed superimposed，with good connectivity and production effects，while the sand bodies in the east are mainly of isolated and side-jointed styles，with low sand body drilling rate and low single well production.

Key words: sand body configuration, delta plain, braided river, braided flow zone, Shanxi Formation, Permian, Da 12 well area, Daniudi gas field, Ordos Basin

CLC Number: 

  • TE122.2+3
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