地理信息系统在韩城矿区煤层气资源评价中的应用

在韩城矿区煤层气资料分析的基础上,建立了煤层气空间数据库。根据钻孔甲烷含量与主要构造线之间的关系,确定主要控气构造的缓冲区半径,并通过缓冲区分析,将储集层划分为渗流区、滞流区和逸散区。通过煤层厚度、甲烷含量、煤层埋深、煤体结构、顶底板封闭性能和构造条件的叠加分析,将主要可采煤层的煤层气勘探开发划分为有利勘探开发区、中等勘探开发区和不利勘探开发区。最后指出韩城矿区煤层气开发的目标靶区。

Application of GIS in coalbed gas resource evaluation in Hancheng mining area

The spatial database of coal bedgas is established on the analysis of data about coal bed gas in Hancheng mining area. According to the relation between the content of methane and main structure line, the radius of buffer area of structure control of gas is confirmed and the storing layer is divided into three parts: seepage district, blocked district and vaporize district by the analysis of the buffer area. With the spliced analysis of coal thickness, content of methane, coal depth, coal construction, close function of top and foot structure condition, the gas exploitation of main coal seam is divided into advantageous, disadvantageous and common area. Finally, it points out the target area of exploitation.