物探与化探Issue(2)：346-351,6.DOI:10.11720/wtyht.2015.2.22
扩展弹性阻抗反演技术在致密砂岩薄储层含气性预测中的应用
Extended elastic impedance inversion technology and its application to the tight and thin sandstone reservoir
摘要
Abstract
Compared with the post⁃stack inversion,the extended elastic impedance is more sensitive to the reservoir and hydrocarbon.In this paper,the authors discussed the theory,key techniques and steps of the extended elastic impedance inversion.Wetake P1x1 and P1s2 in DND gas field of North of Erdos Basin were taken as the study objects.Based on a detailed analysis of logging data,the authors pro⁃pose fusion method for estimating data of shear wave.This method combines modeling method,formula method and neural network meth⁃od.It estimates the sandstone section using modeling method,and mudstone with formula method for low frequency model and,in combi⁃nation with neural network,predicts the mudstone section of shear wave information,thus avoiding the error of mudstone caused by total porosity measurement inaccurate prediction using Xu⁃White model. Based on cross pictures analysis,the authors deal with sensitive elas⁃tic parameters for EEI inversion and effective scale for interpretation of lithology and fluid and,according to deterministic extended elas⁃tic impedance inversion,determine the variation and range and complete the pre⁃stack stochastic extended elastic impedance inversion, thus meeting the requirements of thin reservoir prediction.At last,the inversion results are interpreted crossly and the distribution of gas sand is predicted accurately,with the drilling data matching rate reaching over 90%.关键词
致密砂岩/薄气层预测/扩展弹性阻抗反演/横波估测Key words
tight sandstone/thin gas reservoir prediction/extended elastic impedance inversion/shear wave prediction分类
天文与地球科学引用本文复制引用
时磊,刘俊州,董宁,王箭波,夏红敏,王震宇..扩展弹性阻抗反演技术在致密砂岩薄储层含气性预测中的应用[J].物探与化探,2015,(2):346-351,6.基金项目
国家科技重大专项 （）
