4D seismic modeling and CO2 pressure-saturation inversion at the Weyburn Field, Saskatchewan

► We processed 4D seismic data at Weyburn and generated time-lapse impedance changes. ► We used the impedance values to invert for pore pressure and CO2 saturation changes. ► Pore pressure increases of up to 8-9 MPa were found near CO2 injection wells. ► CO2 saturation increases of up to 90-100 mol% were also detected in these zones. ► We found uncertainties of 4.5 MPa in pore pressure and 30-35 mol% in CO2 saturation.