摘要：

 板桥凹陷位于黄骅坳陷中北部，沙三段是区内的主要生储油岩系。根据沉积环境、沉积特征及重矿物组合分布特征分析，板桥凹陷沙三段沉积期在湖盆的陡岸发育冲积扇-扇三角洲-深水浊积扇-深湖沉积体系以及近岸水下扇-深湖沉积体系，不同的物源区通过边界断层的运动控制着沉积体系的发育。在盆地的裂陷兴盛期，北部燕山褶皱带物源经过北唐凹陷和海河断层，于长芦一带形成扇三角洲，并进一步向板桥凹陷中央推进，形成板桥深水浊积扇沉积体；西北部的沧县隆起物源则沿着不同的入口，在沧东大断裂下降盘形成近岸水下扇和扇三角洲，它们也可进一步向凹陷深处推进而形成深水浊积体。应用沉积体系分布与油气聚集的规律，处于沉积体系的中间相带的扇三角洲和深水浊积扇，具有良好的油气生储组合，是断陷湖盆中有利的勘探目标。

Abstract:

Banqiao sag lies in the middle-northern of Huanghua depression,and Shasan member is the main oil-generating strata and reservoirs in the area.Based on studies of sedimentology characteristics, petrology characteristics and heaven minerals association distribution of sandbodies of Shasan member in Banqiao sag,the result indicated that alluvial fan- fan delta-deep water turbidity fan-deep lake depositional system and beachy subaqueous fan-deep lake depositional system were developed.Different source provenance areas controlled the development of depositional system by controlling the movement of main border faults.During the rifting-subsiding stage of the basin, the north Yanshan fold belt source provenance bypassed Beitang sag and Haihe fault,formed fan delta in Changlu area,and pushed into Banqiao sag to form deep water turbdity fan.From different inlets of the west-north Cangxian uplift,the sediments poured into sag as beachy subaqueous fan or fan delta along Cangdong fault down-dropped block,they would push into sag to form deep water turbidity also.Applied the theory of depositional system distributions and oil-and-gas accumulation,the middle facies belt of depositional system,such as deep water subaqueous fan and fan delta,have good oil-generating strata and reservoirs,they are the most prospective areas for exploration.