【摘要】 基于大量钻井取心及岩心薄片观察,成像测井、录井等资料分析及三维地震资料解释,在厘定塔里木盆地塔中北斜坡中-下奥陶统鹰山组和蓬莱坝组地震层序格架基础上,对其进行沉积古地貌恢复及储层研究,进而建立了相应的台地演化模式、储层演化模式及地质模式。该区蓬莱坝组沉积期为缓坡台地沉积模式,鹰山组沉积期为弱镶边台地沉积模式;其储层发育受沉积控制作用较强,与三级或四级层序界面暴露溶蚀及埋藏流体溶蚀关系密切,呈现准层状和孔洞型储层发育、沉积地貌分异小等特点;蓬莱坝组层(块)状白云岩是下步重要的勘探领域。更多还原

【Abstract】 With a lot of drilling coring and core thin section observations,imaging logging and logging data,as well as 3D seismic data interpretation and on the basis of determining the seismic sequence stratigraphic framework of Yingshan Formation and Penglaiba Formation in the Mid-Lower Ordovician in Tanzhong northern slope of Tarim Basin,we conduct sedimentary paleogeomorphology restoration and reservoir research to further establish corresponding platform evolution model,reservoir evolution model and geological model.Penglaiba depositional period in the region is of gentle slope platform deposition model and Yingshan depositional period is of weak rimmed platform deposition model;reservoir development is under strong control of sedimentation,which is closely related to level 3 or level 4 sequence boundary exposure and corrosion as well as burial fluid corrosion and features quasi-layered and pored reservoir development,small depositional landform differentiation;the laminated or block dolomite reservoir in Penglaiba Formation will be the important exploration area in the next step.更多还原