Dynamic Resolution Time-Lag Full-Waveform Inversion Methodology

This document is a workshop programme presented at the 85th EAGE Annual Conference & Exhibition, focusing on the Dynamic Resolution Time-Lag Full-Waveform Inversion (DR-TLFWI) method. The objective of DR-TLFWI is to enhance the utilization of reflected waves in full-waveform inversion (FWI), particularly in seismic data with limited offset coverage. The document outlines the challenges associated with using reflection energy for velocity updates in FWI, noting that the tomographic term from reflections is often weaker than contributions from diving waves. It details the proposed method's approach to compensate for this weakness through dynamic weighting derived from illumination volume during iterations. The methodology is further explained, including the use of a time-lag cost function to mitigate cycle-skipping issues. Applications of DR-TLFWI on field data from offshore Indonesia are discussed, demonstrating improvements in velocity model updates and migration images, which enhance reservoir interpretation. The document concludes with observations on the effectiveness of DR-TLFWI in addressing image distortions and improving depth accuracy.