摘要
高邮凹陷位于苏北盆地东台坳陷中南部,为含油气资源最为丰富的半地堑式断陷盆地。凹陷基底发育的NEE、NNE两组基底断裂在古今纪断陷期近南北向拉张应力场作用下复活。大型边界真(1)断层是两组基底断裂复活并相互扩展连接,同时追踪新生近EW向断层发育而成,其左侧的真(2)断裂带走向与之大致平行,协同弯曲,是铲状真(1)断层派生的替代性分离断层。本文通过3D Move三维古构造恢复技术,全面的再现了高邮凹陷真武断阶带主干反射层三维构造形态,客观的反演了主干断裂活动演化规律,验证了上述成因分析结论。
Situated in the middle-southern part of the Dongtai depression in the North Jiangsu basin, the Gaoyou sag is a semi-graben-like rifted basin most abundant in oil and gas. Two groups of NEE and NNE basement faults developed at the bottom of the sag were revived in the Paleogene rifting period in a nearly south-north tensile stress field. The large borderline fault Zhen 1 has been formed by the two groups of basement faults that came to life, extended, linked up with each other and developed along the newborn nearly EW-trending fault, and at the left the faulting zone Zhen 2 is roughly parallel to Zhen 1, accordingly curving, as a replacement derived from the spade-like fault Zhen 1. This paper completely reconstructed 3D structural form of the major reflecting layer of the Zhenwu step-fault zone in the Gaoyou sag, objectively inverted the major fault activity and evolution law and tested the abovementioned genetic analysis and conclusion using 3Dmove paleostructure recovery technique.
出处
《安徽地质》
2017年第2期105-109,共5页
Geology of Anhui
基金
国家自然科学基金重大研究计划(编号91214301)
江苏油田项目共同资助的成果
关键词
高邮凹陷
基底断裂
三维古构造恢复技术
演化规律
Gaoyou sag
basement fault
3D paleostructure recovery technique
evolution law
