COMPUTATIONAL MODELING OF CARBON DIOXIDE SEQUESTRATION IN FRACTURED AND POROUS MEDIA

In this paper geological sequestration of carbon dioxide were reviewed, and a computational model for analyzing the process of CO2 sequestration is described. Experimental and computational modeling methods for studying multiphase flows in porous and fractured media were studied. The experimental setup of a laboratoryscale flow cell was described in details. It was shown that the gasliquid flows generate fractal interfaces and the viscous and capillary fingering phenomena were discussed. Experimental data concerning the displacement of two immiscible fluids in the lattice-like flow cell were presented. The flow pattern and the residual saturation of the displaced fluid during the displacement were discussed. Numerical simulations results of the experimental flow cell were also presented. Numerical simulation results for single and multiphase flows through rock fractures were also presented. Fracture geometry studied was obtained from a series of CT scan of an actual rock fracture. Computational results showed that the major losses occur in the regions with smallest apertures. An empirical expression for the fracture friction factor was also described. Applications to CO2 sequestration in underground brine fields depleted oil reservoir stimulation were discussed.

کلیدواژه ها:

Carbon dioxide sequestration ، multiphase flows ، flows in porous media ، flows in fractured media ، immiscible flows ، computer model ، reservoir engineering