A comparison of the inverse Q filtering methods based on wavefield continuation

Wavefield continuation algorithm is the most common inverse Q filtering method;nevertheless,due to the unstability of ampli-tude factor,part of the high frequency is magnified,which affects the results of inverse Q filtering.It is thus confirmed that complete sta-bility amplitude compensation is only related to Glim by formula derivation,which causes difficulty to improve deep seismic wave resolu-tion.The authors systematically analyzed the filter properties of different amplitude compensation operators in the wavefield continuation inverse Q filtering.Gain control compensation method is neither magnify nor suppress a certain frequency.Regularized and iterative com-pensation methods not only have strong anti-noise capability but also have better amplitude compensation capability for deep seismic waves.By applying different amplitude compensation operators to theoretical models and actual data of cross-well seismic data,the au-thors found that regularized and iterative amplitude compensation factors have strong suppression effects on high-frequency interference;for middle and deep part of seismic records and seismic records with low-Q energy attenuation,they also have better compensation effects.