CAJ | 학술논문

　　煤层气开发过程中，储层的渗透性是制约煤层气开发的重要因素之一。采用煤心室内流动实验的方法，对不同围压、不同流压下的煤心进行渗透率测试，得出其渗透率变化曲线；进而，对实验数据进行回归发现，煤心渗透率与围压之间存在幂指数关系，而模型参数与注入压差之间存在指数关系。分析三维渗透率流动实验过程得出，煤心渗透率变化为非可逆过程，煤心的左右方向对压力变化更为敏感；同时，在低压区，渗透率变化较快，而高压区变化平缓。因此，在煤层气开发过程中，要尤其注重低压区压力变化对渗透率的影响。
　　매층기개발과정중，저층적삼투성시제약매층기개발적중요인소지일。채용매심실내류동실험적방법，대불동위압、불동류압하적매심진행삼투솔측시，득출기삼투솔변화곡선；진이，대실험수거진행회귀발현，매심삼투솔여위압지간존재멱지수관계，이모형삼수여주입압차지간존재지수관계。분석삼유삼투솔류동실험과정득출，매심삼투솔변화위비가역과정，매심적좌우방향대압력변화경위민감；동시，재저압구，삼투솔변화교쾌，이고압구변화평완。인차，재매층기개발과정중，요우기주중저압구압력변화대삼투솔적영향。
During coalbed methane development, the permeability of reservoir is one of the important restricting factors. The paper, adopting lab flowing test of coal cores, has measured the permeability of coal cores under dif-ferent confining pressure and different flowing pressure, obtained the variation curves of permeability. Furthermore from regression of test data, it was found that there was power exponent relation between the permeability and the ambient pressure in coal cores, and there existed exponential relation between model parameters and injection pressure difference. The analysis of flowing experiment process of 3D permeability indicated that the permeability variation of coal cores is a non-reversible process, the left direction and the right direction of coal cores are more sensible to pressure change. Moreover, in the lower pressure area, permeability change is faster, but in higher pressure area, it is slower. So it should take more attention to the pressure change in the low pressure area during coalbed methane development.