地质和测井联合反演储层波阻抗技术  

Geology and logging joint inversion of wave impedance

作　　者：黄凤祥[1,2] 纪璇[3] 龚福华[3] 桂志先[1,2] 杨亚华[1,2] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [2]长江大学地球物理与石油资源学院,武汉430100 [3]长江大学地球科学学院,武汉430100

出　　处：《地球物理学进展》2016年第2期668-674,共7页Progress in Geophysics

基　　金：国家自然科学基金(41074104);国家科技重大专项(2011ZX05006-004)联合资助

摘　　要：为进一步提高波阻抗对储层反演的精度,增加其纵向预测性,以满足储层预测开发的需要,在对储层预测研究中,利用测井资料在纵向上的高分辨率,及地质岩心资料对地下岩性、含油性的清晰反映,将地质资料与测井资料相结合预测储层.该方法通过取心井的岩心、铸体薄片及扫描电镜观察分析,精细准确地得到该区的主要岩性、孔隙类型及其含油特征,将该区储层和非储层划分为7种,并运用测井资料计算不同类型储层波阻抗范围,利用交会图分析得到有利储层波阻抗门槛值,并应用取心井试油资料在地震反演属性平面图及剖面图上进行验证,取得较好效果.As the geology of oil and gas exploration in our country has become increasingly complex. it is essential to carry out the geological and geophysical multi-disciplinary integrated studies to fully know the object and strengthen the understanding of underground geological body. The resolution of conventional seismic inversion is not high due to the impact of noise and band wavelets.This makes the inversion results can not describe and recognize formation accurately. So,it is urgent to improve the accuracy of lateral lithology prediction and the description of geological objects to understand the spatial distribution of the target formation.By using the vertical high resolution of logging data and the clear reflection of the lithology and oil characteristics of geological data,The paper combined both together to predict reservoir and accurately get the main lithology,pore types and oil characteristics in this area according to the core image,casting thin sections and scanning electron microscopes of three coring wells. And the reservoir and non reservoir are divided into seven kinds. Then the wave impendance range of favorable reservoir can be calculated by analyzing the cross-plot of well logging. In the last,The paper used three coring wells to verify the result in seismic inversion attribution map and section map,and obtained good result.The wave impedance threshold of favorable reservoirs which obtained from cross-plot is applied to inversion profiles to predict reservoir. Otherwise,the inversion profile of other several wells is used to validate the result of prediction. And the oil layers ＇distribution characteristics of verification wells are consistent with favorable reservoirs＇. It indicated that the effect is good. Compared to conventional three disciplines combined inversion,this paper not only use the macro understanding of geological data but also add the microscopic geological information in seismic impedance inversion.So,it can reduce the multiple solutions of reservoir inversion and it is signif

关 键 词：岩心照片 测井波阻抗 储层预测 地震反演 

分 类 号：P631[天文地球—地质矿产勘探]