Introduction to Geological Sequestration - Introduction to Carbon Capture and Sequestration - page 361

Figure 8.2.1 Injecting CO 2 below a caprock formation
Flow of the CO 2 plume; the brown layer above the injection site is a caprock which is imper-
meable for CO 2 . Because of the lower density of the CO 2 , the plume will slowly migrate to
the highest point in the formation. Figure based on information provided by CO2CRC.
Movie 8.2.1 CO 2 residual trapping simulation
Residual gas trapping occurs when a small amount of CO 2 becomes disconnected or
“snaps off” from the CO 2 plume as the CO 2 moves through the porous rock. The CO 2 is
stored in the pores in tiny bubbles, trapped by surface tension. The CO 2 can't move out
of the pore space and remains fi xed underground. Movie from the CRC for Greenhouse
Gas Technologies (CO2CRC) [8.2]. It can be viewed at: http://www.worldscientifi c.com/
worldscibooks/10.1142/p911#t=suppl