临南洼陷临商断裂带与油气成藏的关系  

Relationship between hydrocarbon accumulation and Linshang fault zone in Linnan area,Huimin Depression

作　　者：陈伟[1] 吴智平[1] 侯峰[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061 [2]中国石油新疆油田公司陆梁油田作业区,新疆克拉玛依834000

出　　处：《油气地质与采收率》2010年第2期25-28,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石油化工股份有限公司重点科技攻关项目"临南地区张扭构造演化及其对油气输导作用的研究"(61-2007-JS-00096)

摘　　要：断裂控藏主要体现在成藏期对油气运聚的输导和封闭。通过临南洼陷临商断裂带断层活动速率分析,结合成藏期断裂不同部位封闭性的模糊综合评价,讨论临商断裂带与油气成藏的关系。结果表明,临商断裂主支活动性强、持续时间长(活动到第四纪),与成藏期(东营组沉积时期、明化镇组沉积时期至今)相匹配,有利于垂向输导;分支活动性明显较弱且消亡早,与主要成藏期匹配差,不利于垂向输导。在东营组沉积时期断裂对油气以侧向输导为主,现今则表现为主支下部侧向输导、上部封闭,分支以封闭为主,局部侧向输导。反映了临商断裂带对油气运聚成藏的控制具有很大的时空差异,正是这些差异使得临商断裂带具有不同的成藏模式,即主断层下盘主支成藏模式和阶梯状帚状分支成藏模式。Fault controlling petroleum accumulation is mainly reflected in hydrocarbon migration and sealing in accumulation periods.By means of fault activity rate analysis and fuzzy comprehensive sealing evaluation in different places of Linshang Fault Zone(LFZ).the relationship between hydrocarbon accumulation and LFZ was discussed herein.The result is ①major branch of LFZ activated intensely and lasted a long time(active until the Quaternary).which matches accumulation periods(Dongying,Minghuazhen to present-day)and is favorable for vertical transportation:however,branch faults activated weaker and disappeared earlier,which couldn't match the main accumulation periods,and is not conducive for vertical transportation.②In Dongying period,faults were mainly lateral channel for hydrocarbon migration.In present-day,the lower part of main branch exhibits lateral migration while the upper shows sealing;Branch faults are mainly sealing with locally lateral migration.So,LFZ controlling petroleum accumula-tion shows a lot of spatiotemporal differences,and because of these differences.different accumulation models are formed:major branch belt accumulation model with foot wall of major fault shaped like 'a tree in blossom' and branch belt accumulation model with typical stcpladder shape.

关 键 词：油气运移 断层活动性 断层封闭性 时空差异 成藏模式 临南洼陷 

分 类 号：TE112.3[石油与天然气工程—油气勘探]