淮南煤田次生生物成因气的比例及资源意义

Studies on Resources Significance and Mixing Proportion of Secondary Biogenic Gas in Coalbed Gases, Huainan Coalfield

主要利用实验的方法,并结合计算,对淮南煤田各研究矿区次生生物成因和热成因混合煤层气的比例进行了对比估算。结果显示两种方法估算的研究区煤层气的混合比例较为一致。淮南煤田混合煤层气中次生生物成因气所占比例较大,最高达到了79%,最低的也占到了43%。同时,国内外的研究也表明,煤层中后期次生生物气的生成可明显提高煤储层的含气量。因此,淮南煤田中后期次生生物气的生成对矿区煤层气资源的贡献重大。

Using experiment and formula method, this study calculated mixing proportion of thermogenic gases and secondary biogenie gases, and evaluated resources significance of secondary biogenie gases in Huainan coalfield. The result showed that mixing proportion is accordant by two different methods. The content of secondary biogenie gases is large in eoalbed gases, the distribution range is from 43% to 79%. Moreover, the research results of domestic and o- versea show that the generation of secondary biogenie gases increases gas content of combed. Therefore, the contribution of secondary biogenie gases is great for combed gases resources in Huainan coalfield.