渝东南-湘鄂西地区构造运动与下志留统页岩气勘探  

Tectonic Movement and Lower Silurian Shale Gas Exploration Potential in the South-east of ChongqiWest of Hunan and Hubei Area

作　　者：李伦炯[1] 杨飞[2] 孙传敏[1] 叶建中[3] 裴振洪[4] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]油气资源与勘探技术教育部重点实验室(长江大学),湖北武汉430100 [3]中石化江汉油田分公司荆州采油厂,湖北荆州434020 [4]中石化勘探南方分公司研究院,四川成都610041

出　　处：《石油天然气学报》2013年第10期68-71,86,共5页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(U1262205)

摘　　要：由于受不同的地球动力学背景和构造应力场控制,渝东南-湘鄂西地区在地史发展的各个阶段经历了多期次的构造变革,形成各种样式的褶皱断裂,期间共经历了加里东运动、印支运动、燕山运动及喜马拉雅运动。加里东至印支运动形成下志留统龙马溪组(S1l)烃源岩并保存较好,燕山运动使得烃源岩强烈褶皱达到成熟-高成熟演化阶段;喜山期遭受构造叠加改造,地层持续抬升掀斜,这既使烃源岩抬升,达到页岩气勘探开发经济深度,同时也给页岩气的保存与开采带来不利影响。综合上述分析认为,该区页岩气开采的有利区应为复背斜上的宽缓向斜或背斜。Controlled by different geodynamic backgrounds and tectonic stress fields,the South-east of Chongqi-West of Hunan and Hubei Area had experienced tectonic movement stages,it resultied in many styles of faults,folds and unconformities.Four tectonic movements were experienced,including the Caledonian,Indosinian,Yanshanian and Himalayan movements.From Caledonian to Indosinian period,the hydrocarbon in Longmaxi Formation(S1l)was created and it waspreserved well,the strong folds of hydrocarbon induced mature-high mature evolution stages in Yanshanian movement.The tectonic overlap and reconstruction were experienced,strata were continuously uplifted and declined,it was the uplifting of source rocks,it improved the economic depth of shale gas exploration,and it also induced unfavorable influence on its preservation.The analysis above indicates that the favorable shale gas exploration areas are on the synclines and anticlines of compound anticline and anticline.

关 键 词：页岩气 构造运动 复背斜 勘探 

分 类 号：P618.13[天文地球—矿床学]