黔北煤田官田坝向斜煤层气赋存及潜力分析

Analysis of CBM Hosting and Potential of Guantianba Syncline in North of Guizhou Coalfield

根据官田坝向斜地质条件、煤层、煤质及1902煤层气参数井等资料,对该区煤层气赋存特征进行分析,认为区内可采煤层发育较稳定,煤层间距较小,埋深适中,处于氮气-沼气带,煤层气含量较高,属中型气藏。煤层气富集、储存、渗透性条件较好,计算煤层气潜在地质储量为85.74亿m^3,煤层气资源潜力较大,具有较好的勘探开发前景。

Based on the materials including the geological conditions, coal seams, coal quality and No. 1902 CBM parameter well data from the Guitianba Syncline, the paper analyzes the CBM occurrence feature, and considers that the target coal seams were developed steadily, with smaller intervals, moder- ate coal buried depth, and relatively high CBM content in nitrogen-methane bag. It belongs to the medi- um-sized gas reservoir. The conditions for CBM enrichment, storage, permeability are favorable. The CBM potential resources are 85.74 billion m3 with great potential and exploitation prospect.