Continuous Gravity Monitoring for CO2 Geo-sequestration.

Abstract: Our purpose is development of a monitoring method for both lowering costs and increasing the safety in CO₂ sequestration by complementing standard seismic survey with various other geophysical techniques, especially gravity monitoring. In many cases reservoirs are relatively thin and deep, resulting in subtle time-lapse gravity signals at the earth's surface. These signals must be separated from gravity signals generated by near-surface hydrological sources, in which case it would be effective to monitor continuously with a superconducting gravimeter. We have started gravity monitoring at a CO₂ sequestration field in Utah in collaboration with the US project of Southwest Regional Partnership. [Copyright &y& Elsevier]