板桥凹陷大张坨断裂带构造特征及其成藏模式  

Structural characteristics and hydrocarbon accumulation model of Dazhangtuo fault belt in the Banqiao sag

作　　者：宋璠 苏妮娜 李慧 洪伟俊 路允乾 刘佳星 刘学嘉 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《东北石油大学学报》2015年第6期12-19,110,共9页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05009-002);教育部博士点基金项目(20120133120013)

摘　　要：大张坨断裂带是黄骅坳陷板桥凹陷最大的Ⅱ级断裂系统,对凹陷油气分布与富集具有重要影响.为了揭示大张坨断裂带与新生代油气成藏的关系,利用油区构造解析理论对断裂带的活动性、断裂构造样式及演化特征进行研究,综合断裂输导体系与断层两盘(上升盘、下降盘)的油气分布状况,建立板桥凹陷大张坨断裂带油气的断控成藏模式.结果表明:大张坨断层具有垂向分期、平面分段的活动特征,断层两盘派生大量次级断层,在断裂带内可识别阶梯型、"y"型、"y"型复合、多米诺式、对倾伸展型等5种构造样式,断裂活动贯穿于整个第三纪沉积史,构造演化具有明显的继承性.不同的断裂构造样式决定断层两盘油气运聚规律具有明显差异,形成不同成因类型与不同储量丰度的油气聚集单元.Dazhangtuo fault belt is the largest levelⅡfault system of Banqiao sag in the Huanghua depression.It exerts important effect on hydrocarbon distribution and accumulation within the sag.In order to reveal the relationship between the Dazhangtuo fault belt and Cenozonic hydrocarbon accumulation of Banqiao sag,the fault activity,fault structural styles and structural evolution characteristics were systematically researched using the oilfield structural analysis method.Based on comprehensive research of fault passage system and hydrocarbon distribution in two fault walls,the accumulation model of Dazhangtuo fault belt in the Banqiao sag were established.The results show that the Dazhangtuo fault,with vertical installment and planar piecewise activity characteristic,derived a large number of secondary faults.Five kinds of structure style can be identified in the fault belt,mainly including the 'ladder' type,the 'y' type,the composite 'y' type,the 'domino' type and the opponent tendency stretch type.The fault activities throughout the Tertiary sedimentary history and the structure evolution have obvious inheritance.The hydrocarbon migration and accumulation are obviously different in the two sets of faults,controlled by the different style of fault structure.And the hydrocarbon gathering units with different genetic types and different reserves abundance formed.

关 键 词：板桥凹陷 大张坨断层 断裂活动 构造样式 构造演化 油气成藏 

分 类 号：TE121.2[石油与天然气工程—油气勘探]