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我国深煤层煤层气的资源量巨大,但对其储层物性认识不够清楚,对深煤层气的深度界限划分也不明确。本次共选取了3套不同的关键参数系列进行了模拟研究。通过研究发现:沁水盆地中高煤阶煤层气,以力学为关键的储层物性临界深度为1 043 m,以储层物性为关键参数的临界深度为614~1 077 m,以产能为关键参数的临界深度为660~980 m。在此基础上,对3套不同的关键参数进行了归一化的曲线拟合,并划分了深煤层和浅煤层的深度界限。
The resources of deep coalbed methane in our country are huge, but the understanding of reservoir physical properties is not clear enough, and the deep boundary of deep coalbed methane is also not clear. This time, a total of three sets of different key parameters were selected for simulation study. According to the research, the critical depth of medium-high coal rank CBM in Qinshui Basin, which is mechanics-critical, is 1 043 m, and the critical depth of reservoir physical property is 614-1 077 m. Taking productivity as the key parameter The critical depth is 660 ~ 980 m. On this basis, normalized curve fitting is performed on three sets of different key parameters, and the depth limits of deep and shallow coal seams are divided.