Effect of absorption boundary layer on nonlinear flow in low permeability porous media |
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| Authors: | WANG Xue-wu YANG Zheng-ming QI Ya-dong HUANG Yan-zhang |
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| Affiliation: | WANG Xue-wu1,2,YANG Zheng-ming1,QI Ya-dong1,HUANG Yan-zhang1,2 1.Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,China,2.Langfang Branch,Petro China Exploration and Development Research Institute |
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| Abstract: | Taking low permeability cores of Daqing oilfield for example,the flow characteristics at low velocity were studied with the self-designed micro-flux measuring instrument.Considering the throat distribution and capillary model,the thickness of fluid boundary layer under different pressure gradients was calculated,and the mechanism and influencing factors of nonlinear percolation were discussed.The results show that the percolation curve of ultra-low rocks is nonlinear,and apparent permeability is not a const... |
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| Keywords: | low permeability reservoirs percolation absorption boundary layer capillary model |
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