Monitoring CO2 injection for enhanced hydrocarbon recovery in carbonate reservoirs poses a technical challenge interpreting changes in pressure & fluid saturations away from wells. This paper focuses on quantitative rock physics modeling of time‐lapse (4D) changes in reservoir pressure and multi‐fluid saturations in a carbonate reservoir from southern Canada. The field is currently under WAG (Water Alternate Gas) injection, and both pressure and CO2 saturation change during the CO2 flooding process. The goal of the dynamic reservoir modeling is to understand and predict CO2 saturations over the reservoir. To achieve this goal, we modeled reservoir properties at different fluid saturations with various effective pressure regimes. 4D rock physics analysis provides the link between dynamic reservoir properties and 4D seismic responses.

Presented at the AAPG ACE 2015.