吉尔嘎朗图凹陷下白垩统断裂特征分析  

THE FEATURE ANALYSIS OF EARLY CRATACEOUS FAULTS IN THE EAST AREA OF JIERGALANGTU SAG

作　　者：张琳琳[1] 周路[1] 张以明[2] 胡红[1] 吴勇[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]华北油田分公司,河北任丘062500

出　　处：《西南石油大学学报（自然科学版）》2007年第S2期5-8,167,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：吉尔嘎朗图凹陷具有典型的断裂控制的箕状凹陷特征,吉东地区断裂十分发育,分布一系列NE、NNE向正断层,断裂都具有同生断层特点,主要活动期为晚侏罗世及早白垩世。NE向主干断裂控制了该区的构造与沉积格局,并将该区由北向南依次划分为宝丰构造带、洼槽带以及巴德构造带,在这些断裂的控制下,洼槽带成为该区的沉积中心;其它断裂为主干断裂的派生或调整断层,断层的相互切割使各构造单元内部进一步复杂化,形成大小不等的断块构造与断块圈闭。断块圈闭形成期与油气生成及运移期匹配,靠近洼槽的断块圈闭更有利于油气聚集。Jiergalangtu sag is a type of fault-controlled half graben-like basin.In this area,faults are very complex.There are a series of normal faults whose trends are northeast and north-northeast,the faults are almost growth faults,and the main period when they acted were Late Jurassic and Early Cretaceous.The main faults of northeast trend control the pattern of structure and sedimentation in this area,and divide this area into three parts: Baofeng structural zone,Bade structural zone and sag zone.Under the control of these faults,the sag zone became the center of sedimentation.The other faults are the derivation of the main faults.The faults cut each other,make the structure units more complex and form a series of fault traps or fault structure that are different in size.The matching of fault-trap developing time and oil active time makes the fault-traps around the sag zone more suitable for the oil accumulation.

关 键 词：二连盆地 吉尔嘎朗图凹陷 断裂特征 形成演化 构造特征 

分 类 号：P542.3[天文地球—构造地质学]