柴达木盆地西部新生界油气分布规律  

Distribution Rules of Hydrocarbon in the Cenozoic Erathem of Western Qaidam Basin

作　　者：曹海防[1] 夏斌[1] 胡勇 张娣[3] 范立勇[1] 刘平[1] 

机构地区：[1]中国科学院广州地球化学研究所 [2]中国石油青海油田分公司,甘肃敦煌736202 [3]中国石化胜利油田有限公司地质科学研究院,山东东营257237

出　　处：《桂林工学院学报》2007年第1期6-12,共7页Journal of Guilin University of Technology

基　　金：中国科学院知识创新工程资助项目(kzcx2-sw-117)

摘　　要：以柴达木盆地西部多年的勘探成果及取得的地质认识为基础,剖析了该区新生界油气成藏的主控因素.得到了本区新生代油气分布的几点规律:下干柴沟组上段(E23)和上干柴沟组(N1)作为本区的主力烃源岩是形成油气田的先决条件;深大断裂控制了油气藏在横向上和纵向上的分布;构造发育史、圈闭和生烃条件的匹配是油气成藏的关键;通过构造运动、圈闭和生烃史匹配关系研究发现新近纪的构造圈闭是最有利的油气圈闭;新构造运动以来形成的浅层滑脱断层对原生油气藏具有较大的破坏作用.Based on the exploration and geologic cognition for many years in the west of Qaidam Basin, study is made about the major controlling factors of hydrocarbon accumulation in this area. The rules of hydrocarbon distribution are found： The distribution of effective source rocks in E3^2 and N1 formation is the precondition to discover hydrocarbon; Discordogenic faults control the distribution of hydrocarbon accumulation in vertical and horizontal. Because of hydrocarbon accumulation, tectonic development history and trap match with hydrocarbongenerating condition. The result shows the structural trap of the Neogene matches well with the hydrocarbongenerating history. It is a beneficial hydrocarbon trap in this area. The ecollement fracture gTeady destroys primary oil-gas reservoirs through new structural movement.

关 键 词：油气分布规律 新生界 烃源岩 断裂 柴达木盆地西部 

分 类 号：P618.130[天文地球—矿床学]