渤西地区断裂体系与油气运聚

研究了渤西地区的断裂体系 ,以及由断裂体系控制的局部构造带的分布和油气运聚规律。渤西地区的圈闭有沿断层和凸起区分布的特点。凸起或低凸起区构造带以潜山、披覆背斜、地层超覆圈闭为主 ,边界断层下降盘常发育滚动背斜、断鼻圈闭 ,低凸起区是形成大、中型油气藏的有利场所。凹陷内的大断层两侧发育断块、滚动背斜、断鼻构造及凹中隆 ,已发现的中、小型油气田呈串珠状分布于大断层两侧。本区断层的发育对油气运移与聚集起重要作用 ,两组断层的交汇处 ,钻探成功率很高。

FAULT SYSTEM AND HYDROCARBON MIGRATION AND ACCUMULATION IN BOXI AREA

In Boxi area, traps develop along major faults and on uplifted zones, with downthrown sides of boundary faults dominated by rollover anticlines and faulted noses, and uplifted or low uplifted zones dominated by buried hills, draping anticlines. and stratigraphic overlapping traps. These low uplifted zone are advantageous to occurrence of major pools. Along two sides of major fault in sag, faulted blocks, rollover anticlines, faulted noses and a center crest have developed, and medium and small oil gas fields occur in moniliform. Migration and accumulation of hydrocarbon are probably controlled by major faults, with the intersection zone of two sets of fault having a high success rate of drilling.