A 2D full-waveform inversion using trench-deployed surfaceand VSP DAS data from CaMI FRS

Luping Qu, Wenyong Pan, Kristopher A. Innanen

Based on the previous surface-wave full-waveform inversion (FWI). A full-waveform inversion using trench-deployed surface waves and two wells’ Vertical Seismic Profiling(VSP) data was conducted to generate a high-resolution S- and P-wave velocity models of the near surface at Containment and Monitoring Institute Field Research Station in Alberta.In this preliminary inversion, a sequential inversion was conducted by firstly inverting Vs using surface-wave FWI, and secondly inverting Vp using the VSP FWI. There are two datasets collected in August 2022 for the main CO2 monitoring line, line 13. They possess the same frequency range, with linear and low-dwell sweep, respectively. In this study, we compared these two datasets in detail. The inversion results are from the DAS data generated using the low-dwell sweep. Optical transport method was adopted to mitigate the cycle skipping problem mainly in surface wave inversion.