沁水盆地阜生煤矿煤储层物性特征

Physical Characters of Coal Reservoirs in Fusheng Coal Mine of Qinshui Basin

为了开发利用煤矿区煤层气资源,防治煤与瓦斯突出和矿井瓦斯超限,基于井下煤层裂隙和煤体结构观测,结合压汞实验和含气量测试及煤层底板等高线构造曲率,分析了阜生煤矿15号煤储层的物性特征。研究结果表明:15~#煤过渡孔、微孔发育较好,利于煤层气的吸附,大、中孔基本不发育,不利于煤层气的扩散和渗流;含气量介于5.30~16.36 m^3/t之间,煤层气资源量为36 741.31万m^3;煤体结构为碎裂煤至碎粉煤,煤层底板等高线构造曲率预测其渗透率介于0.004×10^(-3)~0.134×10^(-3)μm^2之间。

In order to exploit coalbed methane（CBM） resources, prevent the outburst of coal and gas and avoid gas overrun in coal mining area, the characters of 15~#coal reservoirs were analyzed based on the underground observation of natural fractures and coal structure, combined with mercury intrusion test, gas content test as well as the tectonic curvature of the coal seam floor contour in Fusheng Coal Mine. The results show that the transition pores and micro-pores of 15#coal, which are beneficial to the adsorption of coalbed methane, are well developed. The micro-pores and medium-pores are not developed, which shows that 15~#coal is unfavorable to the diffusion and seepage of coalbed methane. The gas content range is from 5.30 m3/t to 16.36 m3/t and the amount of coalbed methane resource is 367.413 1 million m3. The coal body structure from broken coal to pulverized coal is developed in research area and the tectonic curvature of the coal seam floor contour predicts that the permeability range is from0.004×10（-3）μm^2 to 0.134×10（-3）μm2.