地层切片结合相干技术在砂体刻画中的应用

针对油田开发中后期井间砂体边界刻画困难、河道组合方式多样化、难以确定河道内部变差砂体展布等问题，对研究区萨尔图油层组进行了精细的地质解释与层位标定。在地震沉积学的理论指导下，利用地层切片技术提取振幅属性，并定性定量地优选各沉积单元的地震切片，用相干技术作为辅助刻画砂体边界的方法，最终制作了振幅—相干融合切片，与测井资料相结合，对研究区萨尔图油层组共33个沉积单元展开了精细刻画砂体的研究。研究显示振幅—相干融合切片对研究区内井间砂体边界、河道组合方式及河道内部变差砂体的刻画均有良好效果，并对研究区北部测井资料缺失的下段层位进行了砂体展布预测，解决了以往仅以测井资料作为刻画砂体依据的一些弊端。

Application of stratal slicing and coherence technique for describing sand body

In the middle-late stage of reservoir development，in order to solve the problem of describing sand body boundary between wells，river channel′s combination is diversity，difficult to describe the variation sand body′s distribution，and so on. We elaborate geological interpretation and level calibration sartu oil-bearing layer，under seismic sedimentology′s guidance，we use strata slice technology to extract seismic attribute，after that we choose seismic attribute slice of every sedimentation unit quantitative and qualitative，use coherence technique as an auxiliary method to describe sand body boundary，at last we make amplitude-coherence fusion slice，and combined with log information，the study of describing sand body of thirty-three sedimentation unit Sartu oil-bearing layer has been carried out. The study shows that amplitude-coherence fusion slices have a great effect on the problem of describing sand body boundary between wells，river channel′s combination is diversity and describe the variation sand body′s distribution，and we continue forecasting the sand body′s distribution at the lower sedimentation unit which has no log information in the north of the study area，and solve the problem of only use log information to describe sand body before.