【摘要】 沁水盆地南部地区已累计投入 40口井的勘探工作量 ,并取得了重大的勘探成果 ,证实该区为煤层气高渗富集区。从含煤性、含气性、可采性等方面对该区进行了全面分析 ,得出以下认识 :煤层厚度较大 ,分布稳定 ;煤变质程度高 ,煤的吸附能力强 ,含气量高 ,含气饱和度也较高 ;煤体结构、煤岩类型和煤质好 ,煤层割理较发育 ,渗透性较好 ,适合于压裂改造 ;区域构造稳定 ,煤系及上覆连续地层保存较好 ,后期改造、断裂不严重 ,构造较简单 ,煤层气赋存和保存条件好 ;煤层埋藏较浅 ;水文地质条件比较有利。综合评价该区煤层气具有良好的可采性 ,可以作为我国第一个煤层气滚动勘探开发区块。更多还原

【Abstract】 An exploration work load of 40 wells in total has been finished in the south part of Qinshui Basin and a significant result has been obtained,which proves that this region being of high permeability is rich in coal-bed gas.Through overall analyzing the coal reserves,gas potential and recoverability in the region,it is considered that the thickness of coal-beds with a stable distribution is large;the rank of coal metamorphism is high;and the coal is of strong adsorption capacity,high gas content and high gas saturation;coal body structure,coal petrologic type and coal quality are good;the cleats in coal are developed with fair permeability,which is suitable for fracturing;the occurrence and preservation conditions of coal-bed gas are good because of stable tectonics,well preserved coal measures and overlying strata,a weak late deformation,a few fractures and complete structures;coal-beds are shallowly buried;and hydrogeological condition is relatively favourable.According to comprehensive evaluation it is concluded that the coal-bed gas in the region is of good recoverability,therefore it can be taken as the first coal-bed gas rolling exploration and development area in China.更多还原