山西晋城矿区成庄井田3号煤储层的物性研究

对研究区内3号煤储层的几何形态、割理和孔隙系统进行了研究,并引入了储层结构综合指数(SI)来评价研究区内煤层透气性特征和甲烷运移能力,并得出了如下结论:①全区煤层厚度稳定,是煤层甲烷的良好储集层;②根据全区割理发育程度推测出,构造主应力来自NE-SW方向;③通过孔隙系统研究,3号煤层基本上属于非渗透性储层;④成庄井田3号煤层结构综合指数(SI)等值线平面图,显示了煤层透气性由东北向西南呈逐渐变差的趋势。

Research on characteristics of third coalbed reservoir in Chengzhuang mine,Jincheng coalfield of Shanxi Province

Chengzhuang mine lies 20km to the northwest of Jincheng City,Shanxi Province.Based on the study of geometry configuration,cleat and porosity of the third coalbed reservoir in the study area,and the introduction of reservoir structure synthetic index(SI),the authors evaluated the coalbed permeability and methane migration.It is concluded that the coalbed thickness is steady in the whole region and the steady thickness can be served as a fine reservoir of coalbed methane;the main tectonic stress comes from northwest to southwest based on the detection of cleat development degree;the third coalbed reservoir belongs basically to a non-permeability reservoir through a study of porosity system;the structure synthetic index isogram of the third coalbed reveals a trend of coalbed permeability descends from northeast to southwest.