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在全国煤层气资源评价中，将煤层气资源划分为探明储量、控制储量、预测储量和远景资源量。全国共获得可采煤层中风化带以下煤层甲烷含量大于或等于４ ｍ ３ ／ｔ 、埋深２ ０００ ｍ 以浅的煤层气资源量为１４ ．３３６ ９４４×１０１ ２ ｍ ３ ：其中预测储量９ ６７５ ．１０ ×１０８ ｍ ３ ， 远景资源量１３ ．３６９ ４３４ ×１０１ ２ ｍ ３ 。全国有３５ 个目标区的资源丰度大于１ ．５ ×１０８ ｍ ３／ｋ ｍ ２ ，有４９ 个目标区的资源丰度介于（０ ．５ ～１ ．５） ×１０８ ｍ ３ ／ｋｍ ２ 之间，有３１ 个目标区的资源丰度小于０ ．５ ×１０８ ｍ ３／ｋ ｍ ２ 。埋深小于１ ５００ ｍ 的煤层气资源量９ ．２５６ ０７８ ×１０８ ｍ ３ ，埋深１ ５００ ～２ ０００ ｍ 的煤层气资源量５ ．０８０ ８６６ ×１０８ ｍ ３ 。全国有煤层气资源量大于１ ０００ ×１０８ ｍ ３ 的大型目标区２８ 个，煤层气资源量介于（２００ ～１ ０００）×１０８ ｍ ３ 之间的中型目标区２８ 个，煤层气资源量小于２００ ×１０８ ｍ ３ 的小型目标区５９ 个。

DISTRIBUTION OF COAL BED GAS RESOURCES IN CHINA

In China,the coal bed gas resources were classified as the proved reserves,controlled reserves,forecast reserves and prospective resources in coal bed gas resource evaluation.The total amount of the coal bed gas resources under the weathered zone in the recoverable coal seams with burial depths of less than 2 000 m is 14 336.944 billion m 3 in China,the coal bed methane content being equal to or higher than 4 m 3/t.In which,there are 967.51 billion m 3 of forecast reserves and 13 369.434 billion m 3 of prospective reserves.In China there are 35,49 and 31 target areas which resource abundances are more than 150,between 150 and 50,and less than 50 million m 3/km 2 respectively.The coal bed gas resource extent with burial depths of less than 1 500 m is 925.607 8 million m 3 and that with burial depths between 1 500 m and 2 000 m is 508.086 6 million m 3.In China there are 28 large scale,28 medium scale and 59 small scale target areas which coal bed gas resources are more than 100 000,between 100 000 and 20 000,and less than 20 000 million m 3 respectively.