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.
出处
《世界地质》
CAS
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
关键词
Q值反演
L—BFGS算法
黏滞性声波方程
全波形反演
quality factor（Q） inversion
L—BFGS method
visco-acoustic equation
full waveform inversion
