Mapping CO2 Floods Using the Depth-to-Surface Resistivity Method: A Technology and Field Example

Abstract

Depth to Surface Resistivity (DSR) has been shown to be effective at mapping CO 2 , water flood, and residual oil aerially and vertically. Provided there is sufficient resistivity contrast between injected and in-situ fluids and subject to the reservoir depth and overburden resistivity, the technique is applicable for monitoring IOR/EOR fields. This information can be used to evaluate cap rock integrity, fluid loss to faults, and migration paths. The following paper presents a study of a CO 2 flood followed by water alternating gas (WAG) injection.