基于L—BFGS算法的全波形反演Q值方法研究  

Method of Q through full waveform inversion based on L—BFGS algorithm

作　　者：孙慧秋 韩立国[1] 徐杨杨[1] 高晗[1] 周岩[1] 张盼[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2015年第4期1106-1112,共7页World Geology

基　　金：国家高技术发展规划重大项目(2014AA06A605)资助

摘　　要：估计地层品质因子Q对描述地下构造分布和油气预测都有着重要的意义。考虑到地震波在介质中传播时的黏滞吸收作用,笔者选择2D黏滞性声波方程全波形反演,将观测波场与正演模拟计算得到的波场构建一个目标函数,引入L--BFGS算法反演出地层品质因子。将该方法应用于异常体模型和Marmousi模型测试,结果均表明反演的模型与理论模型的相对误差较小,计算精度高,反演效果好。Estimating the stratigraphic quality factor Q is important for the description of tectonic distribution and the prediction of oil and gas. Considering the viscous property of the medium when the wave propagation is modeled,2D visco-acoustic equation is used to full waveform inversion. The observed wave field and the other wave field obtained by forward modeling construct an objective function,and L--BFGS algorithm is used to inverse seismic quality factor. To test the efficiency of this method（ L--BFGS） in FWI,an abnormal model and a Marmousi model are examined from surface seismic data. The results show that the inversion model is closer to the theorical model,high in the computational accuracy and good in inversion effect.

关 键 词：Q值反演 L—BFGS算法 黏滞性声波方程 全波形反演 

分 类 号：P631.443[天文地球—地质矿产勘探]