渤海大油田形成条件探讨  

Discussion on the forming conditions of Bohai Oilfield

作　　者：邓运华 徐长贵 李建平 

机构地区：[1]中海油研究总院,北京100027 [2]中海油天津分公司,天津300452

出　　处：《中国工程科学》2011年第5期10-15,共6页Strategic Study of CAE

基　　金：国家科技重大专项(2008ZX05024,2008ZX05057);国家“863”计划项目(2007AA090701)

摘　　要：重点分析了渤海形成大油田的石油地质条件。渤海晚期构造活动强,是渤海湾盆地渐新世—上新世的沉降—沉积中心,由此决定了它比周边陆地油区多出了东三段烃源岩,上覆馆陶—明化镇组沉积厚度大,使东三段生油岩深埋、成熟;东二段大型三角洲发育,明化镇组盖层条件好,这些为大油田形成提供了良好的储-盖组合;凸起上大型的潜山-披覆背斜和大断层下降盘的逆牵引背斜,数量多、面积大,为石油聚集提供了场所;基底不整合面及控凹大断层是运移的优质通道,为石油的汇聚提供了条件。以上优越的源、储、盖、圈、运等条件,奠定了渤海大油田形成的基础。The geologicical conditions of Bohai Oilfield were mainly analyzed.Bohai characterized strong late tectonic activity,and it was sedimentation-deposition center of the Bohai Bay Basin in Oligocene-Pliocene period,which made it develop more source rocks in east segment than in the surrounding land areas.Deposition thickness is large overlying Guantao-Minghuazhen making the Third Member source rocks deep buried and mature.The East Second Member developed large delta with good Minghuazhen covering condition,and this provides good reservoir-cap assemblages for the oilfield.The large buried-hill-draped anticlines on uplift and the large reverse-dragged anticlines in downthrown side of the main faults provided spaces for oil accumulation.The basement unconformity and the main faults are the high quality migration passageways.The above favorable source rock,reservoir,cap rock,traps,migration and preservation conditions,laid the foundation for the formation of Bohai Oilfield.

关 键 词：渤海大油田 地质条件 

分 类 号：TE51[石油与天然气工程—油气田开发工程]