基于Kelvin黏声介质的最小二乘品质因子线性反演  

Linear inversion of quality factor based on least-squares strategy for Kelvin visco-acoustic medium

作　　者：杨宇 黄建平 李振春 田坤[3] 李庆洋 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]Earth Science Department of Rice University,6100 Main Street,Houston TX77005,USA [3]中国石油化工集团胜利油田有限公司物探研究院,山东东营257022

出　　处：《石油物探》2015年第6期705-715,共11页Geophysical Prospecting For Petroleum

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB239006,2011CB202402);国家自然科学基金(41104069,41274124);山东省自然科学基金(ZR2011DQ016);中央高校基本科研业务费专项资金(R1401005A,R1401038A);骨干教师人才支持计划联合资助

摘　　要：品质因子Q值是描述介质黏性大小最重要的物理量,准确获取地下介质Q值分布,是黏性介质叠前属性反演、地震波正演模拟及黏性介质偏移成像的基础。为此,基于迭代反演思想,将地下介质的黏滞性引入最小二乘框架中,对品质因子Q值进行线性反演,形成了一种基于多次迭代策略的Q值反演方法;通过简单Q模型、二维盐丘Q模型试算,验证了方法的正确性及适应性。研究结果表明,利用最小二乘迭代反演方法不仅可以得到地下Q值扰动界面,而且可以得到Q绝对值分布。The quality factor （Q）, an important physical parameter of the viscous media, is the basis of the pre-stack attributes inversion, seismic forward modeling and seismic image for the viscous media. In this paper, we introduce the viscosity into the least-squares framework based on the iterative strategy and implement an iterative method to calculate Q by linear inversion. Numerical tests on synthetic data suggest that the proposed method is correct with good validity and high accuracy. In addi- tion, the proposed least-squares iterative inversion method can not only get the interface of Q perturbation but also the distri- bution of absolute Q value which are both very important to describe the attenuation attribution of the media.

关 键 词：黏声介质 品质因子 最小二乘迭代 线性反演 Q值扰动界面 

分 类 号：P631[天文地球—地质矿产勘探]