大港油田滩海区域ZH5断块厚砂体夹层研究

大港油田滩海区域ZH5断块发育单层厚砂体，目前开发效果差，急需开展夹层研究，寻找注水未波及区，挖掘剩余油.通过采用孔隙度-渗透率交会法与测井识别法有效识别，研究区夹层主要为泥质夹层和物性夹层.夹层纵向对应关系差，平面分布受沉积微相展布特征控制，主要发育于滩坝沉积的侧部.泥质夹层主要分布于断块的中南部，呈条带状分布，物性夹层呈片状不稳定分布.通过对ZH29-29井封堵水淹层，控水效果良好.

STUDY ON THE THICK SAND RESERVOIR INTERBEDS OF ZH5 BLOCK IN SHALLOW WATER AREA OF DAGANG OILFIELD

Single-layer thick sand reservoir is developed in the ZH5 block of shallow water area, Dagang Oilfield, but the current exploitation effect is poor. Therefore it is urgent to study on interbeds to search for unaffected areas by water injection and tap the remained oil. The interbeds in the study area mainly fall into muddy and petrophysical interbeds by the effective identification methods of porosity-permeability intersection and logging curve. The vertical corresponding relationship of interbeds is poor; while the horizontal distribution characteristics are controlled by those of sedimentary microfacies, mainly developed on the side of beach bar sedimentation. The muddy interbeds distribute in bands along the central-south of the block. The petrophysical interbeds are in unstable platy distribution. Through sealing the water flooded layer of ZH29-29 well, the water controlling effect is good.