页岩气开采过程中储藏压力影响因素研究

页岩气的流动是一个跨流态、多尺度的复杂问题,研究其在开采过程中,储层压力的变化规律,对其产能效率具有重要意义。基于连续介质模型、双重介质模型以及离散裂缝模型,建立页岩气流固耦合渗流模型。本文采用COMSOL Multiphysics软件建立页岩气水力压裂开采物理模型并进行求解,并且模拟页岩气开采过程中气体流动。通过改变压裂裂缝参数以及采用不同介质模型,探究页岩储层压力的变化规律。

Study on factors affectingreservoir pressure during shale gas mining

The flow of shale gas is a cross-fluid,multi-scale complex problem.Studying the law of reservoir pressure during the mining process is of great significance to its productivity.Based on the continuum model,the dual media model and the discrete crack model,a shale gas-solid coupling seepage model is established.The physical model of shale gas multi-stage fracturing mining was established by COMSOL Multiphysics software and solved to simulate the gas flow during shale gas mining.In addition,by changing the fracture crack parameters and using different media models,investigating the variation of shale reservoir pressure during mining.