Analysis on Coal Bed Methane Corresponding to Groundwater Chemical Types in Some Northern China Plain Coal Fields

摘要

It was demonstrated that groundwater of aquifers in coal measures in northern China usually underwent desulphurization and methanogenesis in turns under a lower ORP (oxidation-reduction potential). Sulfate reduction due to sulfate-reducing bacteria (SRBs) metabolism was found an important hydrochemical phenomenon in the coal measures, and could inhibit methane production. The corresponding relationship between the gas occurrences and groundwater chemical types in coal-fields in central Anhui, eastern Henan and southwestern Shandong, as well as the Qinshui Coal-Basin in Shanxi, was well explained.