城口地区页岩含气特征及影响因素研究

Research into the characteristics and influencing factors of shale gas in Chengkou area

重庆城口地区地处大巴山弧形构造带,经历过多期构造运动,地质条件复杂,区内早寒武世水井沱期沉积的一套浅海深水陆棚相页岩。本文通过对位于北大巴山的重庆城口地区水井沱组页岩气生烃条件,储集条件、保存条件分析研究,结合区域钻井岩心样品现场解吸及等温吸附含气特征,分析该区域页岩吸附气量与Toc、伊/蒙混层等指标相关性,综合总结复杂地区页岩含气特征影响因素及影响机理,为区域页岩气规模化勘探开发提供地质参考。

The Chengkou area of Chongqing locatd in Dabashan arcuate tectonic belt,experienced multiple tectonic movements,having complicated geological structure,which exist a shallow deep shelf shale of Shuijingtuo period of early Cambrian.According to the hydrocarbon conditions,reservoir conditions and preservation condition in Chengkou area of Chongqing which located in Dabashan arcuate tectonic belt,combined the characteristics of the on-site analytical and adsorption isotherm of drilling core samples analysis the correlation between gas absorption quantity of shale and the intex liking Toc,illite smectite mixed layer clay in this region,and comprehensive analysis the factors and the influence mechanism of shale gas in complex areas.