柴达木盆地断裂上下盘油气差异聚集效应与成因  

Accumulation and origin of oil-gas difference between hanging wall and foot-wall blocks in Qaidam Basin

作　　者：王风华[1,2] 罗群[3] 李玉喜[3] 李荣权[1,2] 

机构地区：[1]中国科学院广州地球化学研究所 [2]中国石化股份胜利油田分公司胜利采油厂,山东东营257051 [3]中国石油大学(北京)盆地与油藏研究中心

出　　处：《油气地质与采收率》2007年第2期19-22,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家"973"重大基础研究项目"中国典型叠合盆地油气聚散机理与定理研究"(61999043310);中国博士后科学基金(PX060696)资助

摘　　要：断裂沟通含油气盆地不同层位、不同时代的烃源岩和生储盖组合,成为连接烃源岩和各种圈闭的重要渠道,导致了多种类型的与断裂有关的油气藏的形成。柴达木盆地的断裂控烃特征明显,断裂上下盘油气差异聚集现象十分普遍,不同构造系统区具有不同的油气差异聚集机理和模式。其根本原因是断裂上下盘具有不同的地质特征和油气运聚成藏条件,它们往往是互为消长的关系。油气是富集在断裂的上盘,还是聚集在断裂的下盘,取决于具体的地质条件。Faults become important relation channels between source rocks and traps because they link up source rocks and source rock -reservoir - cap rock assembly on different horizons in different periods in a petroliferous basin, which result in more kinds of petroleum accumulations related with faulting. In Qaidam Basin, the fault controlling hydrocarbon feature is obvious,and the phenomenon of oil - gas difference accumulation between hanging wall and footwall blocks of a fault is common. The mechanism and models of the oil - gas difference accumulation are different in various tectonic system regions. The cause is different geologic features and petroleum migrating and accumulating conditions between the hanging wall and footwall blocks of a fault. Their relation is growth and decline with each other. The petroleum accumulating in the hanging wall or footwall blocks in a fault depends on the geological conditions.

关 键 词：断裂上下盘 油气聚集 差异成因 柴达木盆地 

分 类 号：TE112.31[石油与天然气工程—油气勘探]