BZ34油区明下段浅水三角洲沉积特征及其油气勘探意义  

Discovery of the shallow delta sediment in Minghuazhen formation in BZ34 oil fields and its significance in oil and gas exploitation

作　　者：吴小红[1,2] 吕修祥[1,2] 周心怀 李建平 加东辉 

机构地区：[1]中国石油大学盆地与油藏研究中心,北京102249 [2]中国石油大学油气成藏机理教育部重点实验室,北京102249 [3]中国海洋石油有限责任公司天津分公司,天津塘沽300452

出　　处：《大庆石油学院学报》2009年第5期32-36,40,共6页Journal of Daqing Petroleum Institute

基　　金：中海油重点科技攻关项目(SC06TJ-TQL-004)

摘　　要：渤海海域明下段浅水三角洲砂体在渤中、渤南地区广泛发育.以黄河口凹陷BZ34油区为例,从构造演化、微体古生物、沉积构造、地球物理特征等方面,分析BZ34油区存在浅水三角洲沉积的地质依据.分析浅水三角洲沉积特征及其油气勘探意义知:浅水三角洲具有良好的储盖组合;新构造运动形成和改造了晚期圈闭,并决定了圈闭的最终定型,圈闭的形成与浅水三角洲储层形成时期一致;新近纪以来凹陷主力源岩生烃峰期与新构造运动同步耦合,晚期走滑伴生断层沟通了烃源,并且是研究区良好的油气输导体系,这促成了BZ34区油气的晚期成藏.Among the big and medium oil and gas fields in Neocene in Bohai sea,the reservoirs are mainly fluvial facies and shallow water lake delta facies.And the shallow water delta sedimentation is in majority.The sands of shallow water lake delta develop widely in Bozhong and Bonan areas.For example BZ34 oil fields in Huanghekou depression,the evidences on the currencies of shallow water delta are obvious.And the significance for oil and gas exploitation is great.First,the formations of reservoirs and caps are very good.Second,the period of the traps' formation is consistent with the reservoirs' formation.Finally,the periods of hydrocarbons' generating are consistent with neotectonics,so the strike slip faults communicate the hydrocarbons.All these factors promoting the fields form.

关 键 词：BZ34油区 浅水三角洲 沉积特征 新构造运动 

分 类 号：TE122[石油与天然气工程—油气勘探]