Abstract:

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 326 366×10⁸m³,within which the resources buried between 1 000～2 000 m is about 215 666×10⁸m³,the resources buried shallower than 1 000 m is 1107× 10⁸m³.