鄂西渝东地区典型构造流体封存箱划分及油气藏的形成与演化  

Division of fluid compartments and the formation and evolution of oil and gas accumulation in the typical structures of Western Hubei-Eastern Chongqing area,China

作　　者：徐国盛[1] 曹竣锋[1] 朱建敏[1] 袁海锋[1] 刘树根[1] 王国芝[1] 

机构地区：[1]“由气藏地质及开发工程”国家重点实验室(成都理工大学),成都610059

出　　处：《成都理工大学学报（自然科学版）》2009年第6期621-630,共10页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重点基础研究发展规划“973”项目(2005CB422106);中国石化前瞻性项目(PH08001)

摘　　要：鄂西渝东地区海相地层油气保存较为完整。通过对储层沥青(天然气)与可能烃源岩的有机地球化学特征对比分析,确定了丁山构造震旦系储层沥青和建南构造韩家店组、黄龙组、长兴组、飞仙关组、嘉陵江组天然气藏的烃源岩;然后利用EasyRo模型恢复了丁山1井下寒武统和建38井下志留统、二叠系烃源岩的热演化史;再以泥质岩类及膏盐层为流体封存箱的顶底板,划分了两典型构造(古)油气藏所处的流体封存箱系统;最后结合构造演化史,分析了两构造流体封存箱及其油气藏的形成与演化。通过对比分析可知建南构造震旦系-志留系天然气成藏条件优越,仍是今后重点勘探层位。The hydrocarbon preservation in marine strata is complete in the Western Hubei-Easterrn Chongqing area where multi-layered industrial gas pools have been found.An analysis of the formation and evolution of the fluid compartments in typical structures and hydrocarbon reservoirs is important to guide further exploration and exploitation in this area.Firstly,this paper defines the source rock of reservoir bitumen in Sinian of the Dingshan structure and the natural gas pool in Hanjiadian,Huanglong,Changxing,Feixianguan and Jialingjiang Formations of Jiannan structure by a contrastive analysis of the organic geochemistry characteristics between reservoir bitumen（natural gas） and possible hydrocarbon source rock.Secondly,the thermal evolution history of the source rock of Lower Cambrian in Well Dingshan 1 and Lower Silurian,Permian in Well Jian 38 is recovered using the Easy Ro（vitrinite reflectance） model.Thirdly,using the argiloid and gypsum-salt rocks as the top and bottom boards of fluid compartments,and dividing the fluid compartments systems in which two typical structural hydrocarbon reservoirs are divided.Finally,combined with the structural evolution history,the formation and evolution progress of fluid compartments and their hydrocarbon reservoir of two structures are analysed.Through the contrastive analysis,the paper indicates that the Sinian-Silurian＇s hydrocarbon accumulation conditions are favourable in the Jiannan structure.Thus,they are still the main exploration targets.

关 键 词：流体封存箱 油气藏形成与演化 丁山构造 建南构造 鄂西渝东地区 

分 类 号：TE122.3[石油与天然气工程—油气勘探]