页岩微观孔隙中气体流动特征研究

The study of shale gas flow in the mico-scale pores

以页岩微观孔隙作为研究尺度,结合气体流动机制并考虑多个因素,建立了页岩微观孔隙中的气体流动模型。结合数学理论和计算机语言进行数值求解,研究结果显示,页岩微观孔隙中气体滑脱和吸附气体解吸扩散、页岩应力敏感性及页岩物性在不同程度上影响着气体流动,且应力敏感性的负面影响比较突出。

Based on the research scale of the occurrence places of shale gas,we combine the gas flow mechanisms and consider multiple factors,establish a micro model of gas flow in the micopores.The results carried out by using the mathematic methods and the computer programs reveal that,the gas slippage, the diffusion of absorbed gas,the stress sensitivity and the shale properties influence the gas flow in different degree,and the negative effects of stress sensitivity is more outstanding.