Q-compensated reverse time migration (Q-RTM) plays an important role for attenuate media imaging. The highfrequency of the seismic data growth exponentially during the absorption compensation, however, pose a challenge to Q-RTM. In order to overcome the limitation, we developed a stable and efficient Q-RTM method, in which a regularization term is introduced into the decoupled constant-Q fractional Laplacians viscoacoustic wave equation, to suppress the high-frequency instabilities during the attenuation compensation. Meanwhile, a Q compensated excitation amplitude image condition is conducted to decrease the computation complexity. We tested our method on the BP gas chimney model, and the numerical examples demonstrate that this method can effectively overcome the instability during the attenuation compensation, and obtain a prospective effects for Q-RTM.
Presentation Date: Monday, October 12, 2020
Session Start Time: 1:50 PM
Presentation Time: 2:40 PM
Location: Poster Station 7
Presentation Type: Poster
