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首页> 外文期刊>Fresenius environmental bulletin >APPARENT PERMEABILITY FOR SHALE GAS CONSIDERING ADSORPTION AND FLOW PATTERNS: TAKING THE LONGMAXI SHALE GAS RESERVOIR OF SICHUAN BASIN AS AN INSTANCE
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APPARENT PERMEABILITY FOR SHALE GAS CONSIDERING ADSORPTION AND FLOW PATTERNS: TAKING THE LONGMAXI SHALE GAS RESERVOIR OF SICHUAN BASIN AS AN INSTANCE

机译：考虑吸附和流动模式的页岩气的表观渗透性：以四川盆地为例，以川龙米星页岩气藏为例

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摘要

The flow pattern is unique in a certain range of pore size divided by the Knudsen number. In order to characterize permeability of nano-pore in shale gas reservoir more accurately, and solve the issue of apparent permeability calculation, the formulas of nano-pore permeability are put forward considering the influence of adsorption gas and pore size distribution, taking the chang7 shale gas reservoir of of Ordos Basin as an instance. After the calculated results were compared and analyzed, the conclusions are obtained as follows: (1) Pore size is the main factor to determine the flow pattern; (2) There are three main flow pattern in the shale reservoirs nano-pore, slip flow, Fick diffusion and transition diffusion, meanwhile Darcy percolation and Knud- sen diffusion do not exist; (3) Flow pattern has great influence on apparent permeability and adsorption has a greater impact in a high pressure condition (greater than 20 MPa).
机译：流动模式在一定范围的孔径中是独一无二的，该孔径除以knudsen数。为了更准确地在页岩气藏纳米孔的渗透性，并解决明显的渗透性计算问题，考虑到吸附气体和孔径分布的影响，提出了纳米孔隙渗透性的公式，占孔径分布，采用长7页岩鄂尔多斯盆地的气体储层作为一个例子。比较和分析计算结果后，得出结论如下：（1）孔径是确定流动模式的主要因素; （2）页岩储存器中有三种主流模式纳米孔，滑动流，Fick扩散和转变扩散，同时不存在达西渗透和持持knudus扩散; （3）流动模式对表观渗透性的影响很大，吸附在高压条件下具有更大的影响（大于20MPa）。

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