陡倾斜煤层气藏成藏模式——以新疆库拜温州矿区A5号煤为例

CBM Accumulation Mode in Steep Slope: Choosing A5~# Coal Seam of Wenzhou Mining Area in Kubai Xingjiang as Example

以新疆温州矿区A5号煤储层为陡倾斜煤层气藏地质研究对象,对储层条件、气藏保存条件,流体特征等进行综合分析,结果表明:相较于低倾角煤层气藏,陡倾斜煤层气藏特征在深部和浅部均体现出较强的非均一性;风化层以下一定深度的倾斜段是煤层气成藏主要部位;矿区煤层气藏类型为承压水封闭气藏。

The A5^# Coal Seam is selected as a research target of the CBM reservoir geology of steep slope,and comprehensive analysis of the reservoir condition,the gas storage conditions and the fluid characteristics is conducted. The study results show that there are some differences from normal reservoir.Fist,compared with CBM reservoir with low declination,the characteristics of the CBM reservoir with steep slope are strongly non-homogenous in both the deep and shallow parts. Second,the weathering under certain depth of inclined section is a major part of the CBM reservoir. Third,the type of CBM reservoir in this coal mining area is reservoir with confined water.