地面钻井水力压裂煤层瓦斯流动规律研究

Study on the law of ground drilling hydraulic fracturing of coalbed gas flow

本文通过4个地面钻井进行煤层水力压裂实验,煤层压裂后瓦斯流动过程符合菲克扩散定律和达西渗流理论,抽采效果的好坏取决于煤层赋存条件、煤质、煤层原透气性以及产生砂缝的透气性等因素,掌握瓦斯流动规律有助于提高地面钻井水力压裂抽采瓦斯效果。

Through the experiment of four ground well drilling hydraulic fracturing in this paper, the gas flow process after hydro fracture according to Ficks law of diffusion and Darcy seepage theory, The gas extraction effect depends on the occurrence condition of coal seam, the original gas permeability and sand seam permeability etc. , the gas flow law is helpful to improve the gas extraction effect of ground well drilling hydraulic fracturing gas.