川东北侏罗系千佛崖组页岩气勘探潜力分析

通过对比国内外页岩气成藏的有利地质条件,分析测试发现川东北侏罗系千佛崖组暗色泥页岩具有埋藏深度适中(3 500～4 000 m),厚度较大,TOC平均质量分数大于1.0%,热演化程度在1.43%～1.62%之间,孔隙度平均为4.08%,渗透率平均为1.106 6×10-3μm2,并且脆性矿物质量分数高等特点,具有良好的页岩气成藏和开发条件,勘探潜力巨大.

Analysis of the exploration potential of shale gas in Jurassic Qianfoya Formation in Northeast Sichuan Basin

By comparing and summing up the favorable geological conditions for the accumulation of shale gas at home and abroad,it is found that the dark shale of Jurassic Qianfoya Formation in Northeast Sichuan Basin has the characteristics of moderate burial depth(3 500～4 000 m),a larger thickness,the average TOC mass fraction of 1.0%,the thermal evolution degree of 1.43%～1.62%,the average porosity of 4.08%,the average permeability of 1.106 6×10-3 μm2,high content of brittle minerals,and so on.So there are good shale gas accumulation and development conditions in this area,and the exploration potential of shale gas is huge.