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《Petrochemical Industry Application》 2012-06
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The research on the determination of the porosity limitation of the low permeability sandstone reservoirs by the water film thickness

WANG Yong1,LIU Jianbo2,WANG Wenquan3,FAN Lingling1,WANG Shu1 (1.Chengdu University of Technology Energy College,Chengdu Sichuan 610059,China;2.China University of Petroleum (Beijing)Petroleum Engineering College,Beijing 102249,China;3.The No.2 Oil Extraction Plant of Changqing Oilfield of PetroChina,Qingyang Gansu 745000,China)  
Based on the data obtained in mercury injection experiment and the researching of physical property and pore structure, the high mean value of the study area shows that the throat is mostly micro ones; slight standard deviation presents a well-sorted reservoir and generally tiny throat, the coefficient of variation is low, which indicates a poor pore structure. low permeability, high capillary pressure and high irreducible water saturation are characters of a typically low permeability sandstone reservoir. Pore-throat parameters and the water film thickness are of the same magnitude in low permeability sandstone reservoirs. Combining the mercury injection data and the water film thickness, the paper completes a probability distribution chart of porosity and pore throat width larger than 0.195 μm, and then it determines the porosity limit of the low permeability sandstone reservoir of the study area is 3.5 %.
【Fund】: 国家科技重大专项(2008ZX05044)资助
【CateGory Index】: TE311
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