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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2014  >  36(1): 123-128
Wang Ruifei, Qi Hongxin, Lü Xinhua, Guo Dianbin. Characteristics and controlling factors of movable fluid in deep-buried high-pressure and low-permeability sandstone reservoirs：A case study of middle section of 3rd member of Shahejie Formation in Wendong Oil Field, Dongpu Sag[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 123-128. doi: 10.11781/sysydz201401123
Citation: Wang Ruifei, Qi Hongxin, Lü Xinhua, Guo Dianbin. Characteristics and controlling factors of movable fluid in deep-buried high-pressure and low-permeability sandstone reservoirs：A case study of middle section of 3rd member of Shahejie Formation in Wendong Oil Field, Dongpu Sag[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 123-128. doi: 10.11781/sysydz201401123
shu

Characteristics and controlling factors of movable fluid in deep-buried high-pressure and low-permeability sandstone reservoirs：A case study of middle section of 3rd member of Shahejie Formation in Wendong Oil Field, Dongpu Sag

doi: 10.11781/sysydz201401123
  • 1.

    College of Petroleum Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China

  • 2. SINOPEC Zhongyuan Oilfield Company, Puyang, Henan 457001, China

  • Received Date: 2012-09-20
  • Rev Recd Date: 2013-12-03
  • Publish Date: 2014-01-28
    Abstract
  • The samples of the deep-buried high-pressure and low-permeability sandstone reservoirs in the middle section of the 3rd member of the Shahejie Formation in the Wendong Oil Field of the Dongpu Sag were tested with nuclear magnetic resonance technique. The characteristics and controlling factors of movable fluid were analyzed with movable fluid percentage and porosity. The results have shown that the T2 pattern of the samples displays 4 modes, and the T2 cutoff value is positively correlated with porosity. The movable fluid content is relatively low and the heterogeneity is intense. The higher the permeability is, the wider is the main throat radius. The relation between the movable fluid parameter and the permeability gets better with the increase of permeability. The movable fluid parameter gets higher attenuation velocity with the decrease of permeability and has more sensitivity to the changes of permeability. The micro-pore structure determines the existing state of fluid in deep-buried high-pressure and low-permeability sandstone reservoir. Applying main throat radius, the micro-pore structure controlling movable fluid was token, which has achieved good results. Wide throat controls more movable fluid when physical property is better.

     

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