渤南油田沙三段含油体系研究

渤南洼陷位于沾化凹陷中部，是济阳坳陷中的一个三级负向构造单元，接受了巨厚的中、新生代断陷湖盆和坳陷湖盆沉积。沙三段沉积了一个大型浊积岩体，形成了一个大型浊积砂岩油田。该油田从20世纪60年代开始勘探开发，目前已完钻探井及开发井1000余口，进入勘探开发的高成熟区。该文利用渤南洼陷各项地质资料，从含油体系的角度阐述生储盖条件及油气生成、聚集特征，最后指出在洼陷的斜坡带进一步寻找岩性油藏是下步勘探方向。

Research on Es3 oil-beating system in Bonan oilfield

Bonan subsag lies in the middle of Zhanhua sag, and it is a third class negative structural element in Jiyang depression that deposited the massive rift lake basin and downwraped lake basin in Mesozoic and Cenozoic era. A large scale turbidite body sedimented in Es 3 forming a large scale turbidity sandstone oilfield. Exploration and production in this oilfield are started in 1960s and it has entered high maturation stage with more than 1000 drilled exploratory wells and development wells at present. The conditions of source reservoir caprock and the features of oil and gas generation and accumulation are set forth from the point of oil bearing system using the geological data of Bonan subsag in this paper. It is pointed out that the next exploration will focus on the slope belt of the subsag to seek lithological reservoir further.