【摘要】 基底断裂是深化盆地构造和油气勘探研究的重要领域。以苏北盆地高邮凹陷为研究对象,综合利用钻井、地震、地质、重磁等多元化资料,对基底断裂进行精细构造解释,明确其几何学、运动学特征及成因演化模式。结果表明,高邮凹陷存在一条主干基底断裂(即真武断裂),平面上呈弯曲线性发育,西段走向NEE向、倾向NNW向,东段走向NE向、倾向NW向,剖面上呈铲式发育,后期继承性演化为浅层的真1断层和吴1断层,并发育挤压、反转、伸展、走滑等4类典型构造样式。挤压期和反转期,真武断裂西部活动性强于真武断裂东部活动性;伸展期,真1断层活动性强于吴1断层。在区域动力学分析基础上,分5个阶段解释了高邮凹陷基底断裂的成因和演化。更多还原

【Abstract】 Basement fault is an important field to deepen structure and exploration of basins.Taking Gaoyou Sag as a research object,structural characteristics of basement faults are investigated according to the drilling,seismic,geological,gravity,and magnetic data and the geometry,kinematics and evolution mode are determined.The results show that there is one main basement fault,called Zhenwu fault.Zhenwu fault performs to be bending linear on the plane and spade on the profile,which strike towards NEE in western part and NE in eastern part,and grows to be Zhen1 fault and Wu1 fault in shallow strata during late period.There are four typical structural styles associated with Zhenwu fault because of the special background of tectonic evolution,including compressional,reverse,extensional,and strike-slip styles.The activity of Zhenwu’s western part is stronger than that in the eastern part during compression and inversion period,and the activity of Zhen1 fault is stronger than that of Wu1 fault during extension period.In the regional dynamics analysis,there are five stages to explain the origin and evolution of basement faults in Gaoyou Sag,which has important guiding significance for its oil and gas exploration and development.更多还原