黄河口凹陷北半环的构造样式及构造演化

黄河口凹陷北半环位于渤海湾盆地的渤中坳陷内,油气富集,构造复杂。系统分析该区构造样式及其演化规律有助于进一步把握勘探方向,研究表明,该区主要发育伸展构造样式和走滑构造样式两大类。新生界以来,主要经历了7次构造旋回,造成现今的构造格局。主要有利的油气聚集带在走滑断层两侧,其次在伸展构造上升盘发育有利圈闭,中浅层两盘都具有有利的油气圈闭。

Tectonic Pattern and Evolution of the North Half Ring in Huanghegou Depression

The northern half ring of Huanghegou Depression was situated in Bozhong Depression of Bohai Bay Basin,where hydrocarbon was enriched with complex structures.The systematical analyzing its tectonic pattern and evolutional rules were beneficial for further exploration.The study shows that stretch structure and sticking-slip structure are grown in the area.Since the Ceinozoic group,it had experienced 7 structural cycles,thus the current structural pattern was induced.The beneficial zones for oil and gas exploration are on both sides of the sticking-slip belt,and beneficial traps are grown on the upside of stretch structure,oil and gas traps are also on the low and middle sides.