Monitoring Co2 Plume In Carbonate: Is It Doable?

Although significant oil and gas deposits in the porous facies, porosity within the carbonate reservoir has been observed to vary widely between tight facies and highly porous reefal facies, making initial prediction of porosity an important exploration/development objective. Major monitoring challenges arise when carbonate reservoirs in X Field, Central Luconia, Sarawak, offshore Malaysia have very high complexity due to different pore shapes, heterogeneity and diagenesis, thus differentiation of injected CO2 with existing background gas/into aquifer will be creating another issue. This paper outlines the findings using various geophysical methods at this site, especially with respect to monitoring of CO2 plume migration in the subsurface. One of the main advantages of this methodology is the ability to integrate various kind of information obtained at different scales and provide the best solution for the deployment at the field scale.