Geosequestration of CO2 requires guided transport to and reliable quantification of the storage capacity of geologic formations as well as safety assessment to ensure permanent retention of the injected fluid. We present a workflow based on the analysis of well logs, experimental insights, and reservoir simulation to better map CO2 saturation distribution from time-lapse seismic data. CO2 saturation maps are typically derived from 4D seismic data using rock physics models to assess fluid saturation and pressure effects. We present here a combination of our rock physics understanding to guide reservoir flow simulations. We find that in addition to fluid saturation changes, fluid reactions with the injected CO2 might better explain 4D seismic amplitude change maps.

This content is only available via PDF.
You can access this article if you purchase or spend a download.