【摘要】 运用高分辨率层序地层学理论和分析方法,综合研究钻井、测井和三维地震资料,在饶阳凹陷大王庄地区古近系沙一段中识别出2个层序界面,将其划分为1个长期基准面旋回LSC1和5个中期基准面旋回MSC1-MSC5。研究区古近系沙一段发育滨浅湖辫状河三角洲沉积体系、滨浅湖滩坝沉积体系和半深湖沉积体系。在等时地层格架约束下,分析了生油岩、储层、盖层及生储盖组合的发育和分布特征与基准面旋回的内在联系,指出沙一段隐蔽油藏勘探应以生储盖组合为研究单元,并采取相应的勘探对策;N50-L3-L444-L434井以西的辫状河三角洲前缘发育区是隐蔽油藏勘探的有利区带。更多还原

【Abstract】 One long-term base level circle(the 3rd sequence)LSC1 and the corresponding five middle-term base level circles(the 4th sequence)MSC1,MSC2,MSC3,MSC4 and MSC5 could be dis- tinguished from the first member of Shahejie Formation within the two sequence boundaries in Dawangzhuang area,Raoyang Depression by the ways and principles of the high resolution se- quence stratigraphy.The base of the research is the data of drill- ing,logging and 3D seismic comprehensively.Within the correla- tion framework,three depositional systems are identified,namely braided river delta,beach-bar of shallow lake and middle deep lake depositional systems.Within the isochronal stratigraphic framework of the depression constrained,the relationship of the base level circle and the source,reservoir rock,cap rock and source-reservoir-caprock assemblages are analyzed.It suggests that different strategy should be applied to the different reservoir -caprock assemblages when we analysis the subtle petroleum res- ervoir exploration of the first member of Shahejie Formation,mo- reover,the study unit should be the reservoir-caprock assem- blage.Such area as the west of the well N50 and well L434 is the most favorable regions for searching subtle petroleum reservoir where the braided river delta front facies developed.更多还原