沁东北15号煤显微组分对微裂隙的控制作用

The Control Action of Northeast Qin's Coal Microscopic Constituent to Micro-fissure

煤层显微组分与微裂隙二元关系研究对煤层气开采具有潜在价值.通过对沁东北太原组15号煤宏观、电镜、物性等方面资料进行综合分析,对煤储层显微组分和微裂隙之间二元机理进行阐述,结果表明,基质有机显微组分可以产生张性裂隙和压性裂隙,而镜质组中的张性裂隙对煤层气扩散作用较大,惰质组中内生裂隙不太发育.该区渗透率呈现低渗——特低渗的原因主要是割理被脉状方解石填充以及粘土矿物的充填.

The microscopic constituent of coal- bed and the micro -fissure＇s binary relation study has a potential value to the coal- bed methane＇s mine. Through the comprehensive analysis of microscopy, electron microscopy, physical property~ data of the northeast Qin of Taiyuan Group No. 15 coal and the elaborating of the binary mechanism between the microscopic constituent of coal - bed and micro - fissure which show that matrix organic microscopic constituent can produce tensional fissures and pres- sure fissures, tensional fissures in the vitreous component has bigger effect on the diffusion of coal - bed methane, endogenous fis- sures in the inertinite component are undeveloped. Permeability of the area presented hypotonie - ultra - low permeability, its main reasons are that the cleats are filled up by the vein calcite and clay minerals.