CO2 storage potential at Forties oilfield and the surrounding Paleocene sandstone aquifer accounting for leakage risk through abandoned wells

A numerical simulation study of CO2 injection into the Forties and Nelson oilfields to estimate their storage potential is presented in this paper. The estimation involves the consideration of key-performance indicator parameters that include: the pressure build-up for different rates and locations of injection, the regional mass fraction of CO2, the volumetric efficiency of the storage reservoirs, and the plume size. Various injection scenarios were compared in terms of these parameters, and the best scenario was identified for the capacity estimation. Potential leakage through the wellbores in the surrounding saline aquifer was also investigated.