摘要
为明确含油气盆地内断裂网络体系复杂程度与油气运移的关系,以临南洼陷T1,T2以及T6层位断裂网络体系为研究对象,利用研究区丰富的三维地震资料及油气运移资料,针对断裂网络体系复杂程度进行了进一步研究.通过拓扑结构分析方法,定量表征临南洼陷不同层位断裂网络体系的复杂程度及连通性,结合典型区带油气运移资料,揭示出临南洼陷不同层位断裂网络体系复杂程度分布特征和油气运移的关系,认为断裂网络体系中断层派生、侧接或相互接近形成的断层交互区和拓扑高值区以及油气运移区具有良好的耦合关系.研究结果表明:断裂网络体系中断层交互区(断裂末端、构造转换带等)和拓扑结构高值区有良好耦合性,这些区域往往具有良好连通性.临南洼陷T6,T2和T1层位断层交互区断层连接节点N_(c)峰值分别位于7~32,7~15和8~12区间内;T6,T2和T1层位断层连接点的C_(B)峰值分别位于1.4~1.8,1.4~1.6和0.8~1.4区间内.断层交互区与油气运移存在良好耦合性,相较于其它构造部位,断层侧接处以及共轭断层形成的断层交互区具有更强的流体活动性,往往是油气运移的优势通道.结合临南洼陷分析,临商断层盘河段尾端、夏口断层侧接处以及曲堤地垒转换带是油气运移的优势通道,有利于形成油气藏.
To clarify the relationship between the complexity of the fault network systems and hydrocarbon migration in petroleum basin,3Dseismic data and hydrocarbon migration data from T1,T2and T6horizon in Linnan sag were analyzed to study the complexity of the fault network system.The complexity and connectivity of the fault network system at different horizon in Linnan sag are quantitatively characterized based on the topological analysis method.The relationship between the distribution characteristics of the complexity of the fault network system at different horizon in Linnan sag was revealed combined with hydrocarbon migration data in typical zones.It indicates that fault derived,flanked and closed to each other to form fault interaction zones,and the topological high value areas and hydrocarbon migration areas have a good coupling relationship in the fault network system.The results showed that:there has a good coupling relationship between the fault interaction zone(fracture tip,structural transition zone,etc.)and the topological high value areas,and these areas also have good connectivity.The peak values of the number of branches(N_(C))in T6,T2and T1horizon are in the range of 7—32,7—15and 8—12,respectively.The peak values of the average number of connections per branch(C_(B))in T6,T2and T1horizon are among 1.4—1.8,1.4—1.6and 0.8—1.4,respectively.There is a good coupling relationship between fault interaction zone and hydrocarbon migration zone.Comparing with other structural area,the fault interaction zone which is formed by overlapping faults and conjugate faults often has stronger fluid mobility.They always become the dominant channel of hydrocarbon migration.Combined with the analysis results of Linnan sag,this concluded that the Panhe area in Linshang fault,the overlapping area of Xiakou fault and the Qudi horst in Linnan sag are the dominant channels for oil and gas migration,which are favorable for the formation of favorable oil and gas reservoirs.
作者
王迪
吴智平
宋国奇
贾光华
WANG Di;WU Zhiping;SONG Guoqi;JIA Guanghua(School of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China;Qingdao National Laboratory for Marine Science and Technology,Qingdao,Shandong 266235,China;SINOPEC Shengli Oilfield Branch,Dongying,Shandong 257015,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2021年第1期154-162,共9页
Journal of China University of Mining & Technology
基金
“十三五”国家重大专项(2016ZX05006-007-001)
中石化重大科技攻关项目(30200018-17-ZC0613-0019)
国家留学基金项目(201906450071)。
关键词
断层交互区
拓扑结构
断裂网络连通性
油气运移
临南洼陷
fault interaction zone
topology structure
fault network connectivity
hydrocarbon migration
Linnan sag
