Coalbed methane system:an unconventional petroleum system

To forecast the distribution of coalbed methane effectively and to point out the favorable area for coalbed methane exploration,the petroleum system is introduced to coalbed methane geology.Coal bed methane system is a natural system that encompasses coal seams and coalbed methane in them including all the geologic elements and processes.The essential elements include coal seams and surrounding rocks,and the processes are generation-reservoir-conservation of coalbed methane.The coalbed methane system is a new way of thinking and method.It offers a procedure and frame of coalbed methane exploration and research.