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煤层气储量、资源量级别主要受控于勘探区所处的勘探阶段和勘探程度。依据探区内开发井数目和储量、资源量评价参数的多寡，我国煤层气可划分为２类资源量和４类地质储量。据不完全统计，我国２０００ｍ以浅的煤层气资源总量约为３２６３６６×１０８ｍ３，其中１０００～２０００ｍ埋深的为２１５６６６×１０８ｍ３，１０００ｍ以浅的为１１０７００×１０８ｍ３。
CBM reserves and resource levels are mainly controlled by the prospecting stage and exploration level of the exploration area. According to the number of exploration wells in the exploration area and reserves, the amount of resource evaluation parameters, China’s CBM can be divided into two types of resources and four types of geological reserves. According to incomplete statistics, the total amount of coalbed methane with a shallow depth of 2000m in China is about 326366 × 108m3, of which the depth of 1000-2000m is 215666 × 108m3, while that of shallow coal is 110700 × 108m3.