Velocity model building with well mis-tie extension in TTI media

A TTI velocity model building approach is proposed that utilizes well mis-tie information as inversion constraints.Since the well mis-tie information is available only at sparse locations, we introduce a function to bridge the well constraints from sparse locations to their surroundings.This function is consistent with the local geological structures.The inversion scheme could help mitigate the ambiguity between the inverted TTI model parameters and the ill-conditioning of the inversion operator, and improve the robustness of the solution.Tests on SEAM synthetic data and wide-angle field data from the Gulf of Mexico showed that the proposed method can improve the positioning of depth migration image and enhanced the flatness of events in common image gathers.