Title

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

单位

(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)

Organization

(1.School of Geosciences,China University of Petroleum,Qingdao 266580,China;2.Earth Science Department of Rice University,Houston TX77005,USA;3.Shengli Geophysical Research Institute,SINOPEC,Dongying 257022,China)

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。

Abstract

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 addition,the proposed least-squares iterative inversion method can not only get the interface of Q perturbation but also the distribution 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;

Keywords:

visco-acoustic media,; quality factor,; least-squares iteration,; linear inversion,; Q perturbation interface;

基金项目

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)及骨干教师人才支持计划联合资助。

DOI

10.3969/j.issn.1000-1441.2015.06.009

基于Kelvin黏声介质的最小二乘品质因子线性反演