永川煤矿延深区须六段砂岩储层特征及致密气储量估算
China Mining Magazine（2016）
Abstract
永川煤矿延深区煤系地层上覆须家河六段岩层含有大量气体.在实验室对须六段岩芯进行了化验分析,结果显示为长石岩屑砂岩层,结构成熟度为中到低,孔隙度平均3.98％,渗透率平均0.080506×10-3μm2,岩层内孔隙以微裂隙为主,含气饱和度平均84.3％,属于Ⅲ～Ⅱ类中等复合性储层类型的致密砂岩气藏.应用容积法计算表明该矿延深区须六段致密砂岩气地质储量为12.84×108 m3,丰度为1.712×108m3/km2.可在井下应用水力压裂技术对岩层增透,结合瓦斯负压抽采系统,对须六段岩层致密气进行开发.
MoreKey words
tight sandstone,rock type,microstructure,porosity,permeability,saturation analysis,reserves estimation
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