叠前弹性波阻抗反演在储层预测中的应用  

APPLICATION OF PRE-STACK ELASTIC IMPEDANCE INVERSION TO RESERVOIR PREDICTION

作　　者：肖思和 李曙光[2] 许多[2] 鲁红英[3] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]中国石化西南油气分公司勘探开发研究院德阳分院,四川德阳618000 [3]成都理工大学网络教育学院,四川成都610059

出　　处：《物探化探计算技术》2010年第5期476-479,454,共4页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：四川省2010年科技计划项目(2010JY0033)

摘　　要：叠前弹性波阻抗反演是当前地震反演技术的一个热点,它利用叠前道集为输入,以横波、纵波、密度等测井资料为约束,联合反演出与岩性、含油气性相关的多种弹性参数,进而进行储层物性及含油气性综合判定。其反演结果比叠后声阻抗反演,在可信度方面有很大提高,能够获得更多、更敏感有效的数据,可对含油气性进行半定量和定量描述,具有广泛的应用前景。这里介绍了叠前弹性波阻抗反演技术的基本原理和方法,并对新疆某油田实际资料进行反演分析,其结果为储层预测和储量计算提供了重要依据,获得了良好的应用效果。Prestack elastic-impedance inversion is currently a hotspot on seismic inversion technique,which utilizes different offset gathers data and logging data like S-wave,P-wave,density etc,jointly inverts a variety of elastic parameters which is related to lithology and hydrocarbon potential.This inversion method can determine reservoir properties and hydrocarbon potential,and the inversion result has a great improvement in reliability compared with the post-stack acoustic impedance inversion.It can obtain more sensitive and effective data,helping to describe hydrocarbon potential semi-quantitatively and quantitatively,and has broad application prospects.This paper describes the basic principles and methods of pre-stack elastic impedance inversion and performs an actual data analysis of certain oilfield in Xinjiang.The results shows the goods effects and provide an important basis for reservoir prediction and reserve calculation.

关 键 词：弹性波阻抗 叠前反演 联合反演 储层 拉梅系数 

分 类 号：P631.4[天文地球—地质矿产勘探]