Research of Coalbed Methane Fracturing Crack Initiation and Propagation Law

Coalbed methane resource is rich in China, however the original fracture system is complex and the fracturing effect, the fracturing crack initiation and propagation law are different from conventional formations, so the conventional hydraulic fracturing experience is not applicable. This paper summarized previous experience, systematically discussed the main factors and influences of coalbed methane fracturing, analyzed the research progress of CBM for fracture propagation law and the main problems and put forward some recommendations on the development direction of theoretical research on coalbed methane fracturing, which are necessary for depth research of coalbed methane fracturing crack propagation law.