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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2014  >  36(1): 77-82
Xiao Kaihua, Feng Dongjun, Li Xiupeng. Micro pore and throat characteristics and moveable fluid variation of tight sandstone in 4th member of Xujiahe Formation, Xinchang Gas Field, western Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 77-82. doi: 10.11781/sysydz201401077
Citation: Xiao Kaihua, Feng Dongjun, Li Xiupeng. Micro pore and throat characteristics and moveable fluid variation of tight sandstone in 4th member of Xujiahe Formation, Xinchang Gas Field, western Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 77-82. doi: 10.11781/sysydz201401077
shu

Micro pore and throat characteristics and moveable fluid variation of tight sandstone in 4th member of Xujiahe Formation, Xinchang Gas Field, western Sichuan Basin

doi: 10.11781/sysydz201401077

  • SINOPEC Exploration and Production Research Institute, Beijing 100083, China

  • Received Date: 2013-09-25
  • Rev Recd Date: 2013-11-26
  • Publish Date: 2014-01-28
    Abstract
  • In order to evaluate the tight sandstone reservoirs in the 4th member of the Xujiahe Formation in the Xinchang area of the western Sichuan Basin, nuclear magnetic resonance and constant-rate mercury intrusion experiments have been carried out to quantitatively analyze micro pore and throat and moveable fluid variation characteristics. Studies have indicated that the moveable fluid parameters, throat parameters and pore parameters of tight sandstones vary largely. In micro-fractured tight sandstones, pores have an advantage over throats affecting the moveable fluid parameters, and the moveable fluid parameters are mainly controlled by pores. Low moveable fluid content and low producing degree of tight sandstones are mainly caused by the relatively long radius and wide distribution of pores and throats. In micro-fractured tight sandstones, the mercury saturation in throats is higher than that in pores, indicating that the dominant type of reservoir space is pore-fracture type in the 4th member of the Xujiahe Formation, the Xinchang Gas Field.

     

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