渤海湾盆地凹陷—凸起油气聚集的差异性

渤海湾盆地具有凹凸相间的构造格局,断裂活动控制了凹陷演化,凹陷控制了烃源岩分布,凹陷中的储层及圈闭条件决定了油气富集场所.渤海湾盆地油气富集有凹陷富集、凸起富集、凹陷-凸起平均富集3种模式.东营凹陷、西部凹陷是典型的凹陷富集油气,沾化凹陷、辽中凹陷、渤中凹陷主要是其周围凸起富集油气,歧口凹陷、黄河口凹陷为凹陷及周围凸起平均富集油气.较准确地认识凹陷、凸起油气富集的类型,能有效地指导勘探,从而提高勘探成功率.

ANALYSING THE PETROLEUM ACCUMULATIONAL DIFFERENCE OF SAG AND UPLIFT IN BOHAI BAY BASIN

There is structural style of sag interwith uplift in Bohai Bay basin. The source rocks distribute in the sag,and rich-belts are controlled by the reservoirs and traps. It is show that there are three accumulational types, ie. rich-sag type, rich-uplift type, average richness type of sag and uplift, according to the difference of sag and uplift. There are Dongying sag and West sag in Liaohe of standard rich-sag type,there are Zhan-hua sag, Liaozhong sag and Bozhong sag with the adjacent uplift of rich-uplift type, the Qikou sag, Huanghekou sag with adjacent uplift are belonged to the average richness type of sag and uplift. It is pointed out that it can effectively help exploration,discovered rich-belts as soon,and enhance effect of exploration, if we accurately forecast accumulational type and rich areas.