Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (6): 1540-1551.doi: 10.13278/j.cnki.jjuese.20180232

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Gas Water Relative Flow of Tight Sandstone Gas Reservoirs and Its Influencing Factors: Case Study of Member 8 of Permian Xiashihezi Formation and Member 1 of Permian Shanxi Formation in Shaan Well 234-235 Area of Sulige Gas-Field in Ordos Basin

Ji Wei   

  1. Changqing Division of China Petroleum Group Logging Co., Ltd., Xi'an 710201, China
  • Received:2018-08-31 Published:2019-11-30
  • Supported by:
    Supported by Young Talent Project of Natural Science Basic Research Plan in Shaanxi Province (2016JQ4022)

Abstract: The Sulige gas-field in the Ordos basin covers a wide range of natural gas, but the gas content varies greatly. In order to investigate the migration characteristics under the influence of gas-water interaction, 13 samples from the 8th member of Permian Xiashihezi Formation and the 1st member of Permian Shanxi Formation in the Shaan Well 234-235 area were selected and studied based on the gas water relative flow analyses. The results show that the fluid permeability of reservoir in the target horizon is poor. The reservoirs with typeⅠgas-water phase permeability curve are hardly seen; while the reservoirs with typeⅡgas-water phase permeability curve are the preferred layers for exploration and development. The movable gas porosity equals to the storage space of recoverable gas, which has a positive correlation with movable fluid porosity, porosity, movable fluid saturation, permeability, effective pore volume, effective throat volume, quartz volume fraction, and carbonate volume fraction. The maximum effective gas-phase permeability equals to the gas flow capacity, which has a positive correlation with the first seven factors mentioned above; while the volume fraction of clay minerals plays a negative role both in the storage space of the recoverable gas and the gas flow capacity.

Key words: tight sandstone gas, gas water relative flow, influence factor, Sulige, Ordos basin

CLC Number: 

  • TE122
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