Sun Wanlu, Ying Wenmin, Fan Mingzhu, et al. GRADATION OF RESERVES AND RESOURCES EXTENTS OF COALBED GAS IN CHINA[J]. 1997, 18(4): 305-308.DOI: 10.11743/ogg19970408.
The grades of coalbed gas reserves and resources extents are mainly determined by exploration stage and degree of a wildcat area.According to the numbers of development wells
the numbers of assessment parameters of reserves and resource extents
China's coalbed gas could be classified into two kinds of resources extents and four types of geological reserves.Based on incomplete statistics
the total coalbed gas resources buried shallower than 2 000 m is about 326 366×10
8
m
3
within which the resources buried between 1 000~2 000 m is about 215 666×10
8
m
3
the resources buried shallower than 1 000 m is 1107× 10