CO2 Characterization at the Sleipner Field with Full Waveform Inversion: Application to Synthetic and Real Data.

In this work, we evaluate the effectiveness of using a Full Waveform Inversion (FWI) algorithm to image CO 2 accumulated in thin layers at the Sleipner field. In a first stage, a feasibility study is carried out on synthetic data to assess the capability of FWI to resolve thin CO 2 layers. The results suggest that the method can be useful to improve the resolution of the velocity model and help in better characterizing both velocities and thicknesses of the CO 2 bearing layers. In a second stage, the method is applied to the Sleipner real data. The results derived from FWI, using frequencies up to 40 Hz, provide clear indications about the geometry and the lateral extent of the CO 2 plume. In a third stage, the inversion results are used to perform pre-stack depth migration. [ABSTRACT FROM AUTHOR]