Experimental study of the temperature-pressure effect on gas transport in peridotite sample from Sudbury Basin, Canada
The physical processes triggering the fluid flow within the stressed rock are highly complex and not fully understood. In order to investigate the gas transport behaviors due to the deformation of rock, the peridotite sample from Sudbury, Canada, was subjected to the temperature-pressure effects using a special rock mechanic testing machine. It is shown that when the sample was ruptured by uniaxial compression, the connective cracks instantaneously occurred accompanied by a swarm of AE activities, which suddenly decrease the fluid pore pressure. This change can be able to drive the gas back to the emerging crack due to the gas pressure gradient within the damage zones. Once the fracture network is filled with backflow gas, gas pressure rose back quickly. The dominant components of mixed gases are carbon dioxide and methane. In addition, a large mounts of gas can be ejected from the deformed sample subjected to the confining pressure. The feature for the gas emission determined by the changes in pore structure of rock is also discussed and analyzed.
C.G. Wang X.H. Zhang H.J. Zhang
State key laboratory for Rock mechanics and Deep underground Engineering, Beijing, ChinaSchool of Me School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, China
国际会议
The Fifth International Symposium on In-situ Rock Stress(第五届国际岩石应力研讨会)
北京
英文
785-788
2010-08-25（万方平台首次上网日期，不代表论文的发表时间）