Least-squares reverse time migration method has theoretical advantages in reconstructing high-resolution images of subsurface structures.However,the conventional least-squares reverse time migration method ignores the attenuation effect of the medium on seismic waves and suffers from the migration artifacts caused by noise.To improve the ability of the migration approach serving hydrocarbon exploration and development,this paper employs the constant fractional-order Laplace operator wave equation as the governing equation for wavefields in viscous media,which can reduce the uncertainty in matching simulated and observed data.Moreover,the objective function of the inverse problem is constructed using a threshold-hybrid norm to improve the anti-noise performance.Through some synthetic and field data,it can determine that the proposed approach efficiently produces a high-resolution image.
关键词
最小二乘逆时偏移/黏滞性介质/波动方程/阈值混合范数/抗噪性
Key words
Least-squares reverse time migration/Viscous media/Wave equation/Threshold-hybrid norm/Anti-noise performance
维普
万方数据