基于地震沉积学的复杂曲流带沉积相研究

为了揭示孔店油田河流相砂体展布特征及复杂连通关系,运用地震沉积学方法综合井资料和90°相位地层切片对孔店油田Ng23砂层的河流沉积砂体平面展布进行精细刻画,并且结合动态资料分析油气开采中储层内部结构对流体运动的控制作用。研究认为将孔店油田的三维地震数据进行90°相位转化可以获得更好的测井岩性标定,地层切片分析结果表明孔店油田Ng23砂层为复杂曲流带沉积,内部发育点坝、河道、泥质河道和泛滥平原,复杂曲流带是由多期河道沉积拼接、叠置组合形成,其内部结构对储层内部流体的运动有明显的控制作用,是调整开发措施、提高油田采收率的目标区域。
To reveal distribution characteristics and complex connectivity of fluvial sandbodies, plane distributions of fluvial deposited sandstone in the Ng23 of Guantao Formation have been finely depicted using logging data and 90-degree phase stratal slices. The controlling effects on fluid motionof the reservoir 's internal structure have also been analyzed according to dynamic development information. Our results show that a 90-degree phase transformation of the 3D seismic data in Kongdian Oilfield can achieve a better logging lithology calibration. The analysis of stratal slices shows thatin the Ng23 deposited in the complex meandering belt are point bar, channel, muddy channel and floodplain deposits. The complex meandering belt is formed by the amalgamation and superimposition of multi-channel deposits and its internal structure has obviously controlled fluid motion in the reservoir. These areas are the target areas for adjusting development measures and improving oil recovery