Prestack data attenuation compensation based on inversion

Abstract

Summary Due to the absorption of subsurface media, seismic waves experience energy attenuation and waveform distortion, which seriously decreases the resolution of seismic data. For prestack seismic data, since the effect of absorption attenuation varies with the propagation path, the amplitude variation with angle (AVA) trend will be distorted. Therefore, we propose a novel prestack attenuation compensation method based on inversion considering the influence of ray paths on the absorption attenuation. We first derive the frequency domain forward formula of the prestack gather in the attenuation media, then reduce the attenuation compensation to an inverse problem, and utilize Tikhonov regularization for stability processing to achieve compensation. Numerical tests, comparative analysis of different compensation methods and noise immunity experiment demonstrate that our method has higher accuracy and can perform attenuation compensation for prestack gather more stably and effectively.