Large-Scale Geological Carbon Sequestration - Introduction to Carbon Capture and Sequestration - page 471

Movie 10.2.1 Calcite surface coating on a glass bead
Movie created from the X-ray CT experiment described in Figure 10.2.9 . The movie
shows the distribution of calcium carbonate coating formed on a single glass bead in
the porous medium. Movie courtesy of Jonathan Ajo-Franklin (Lawrence Berkeley
National Laboratory). It can be viewed at : http://www.worldscientifi c.com/worldsci-
books/10.1142/p911#t=suppl
Organic and biological effects
Most fi eld-scale models assume that organic and biological effects have
a negligible infl uence on the fate of CO 2 in geological formations. In reality,
organic matter and microorganisms are ubiquitous in the subsurface and
they can strongly infl uence (and be infl uenced by) the injection of super-
critical CO 2 . This is obviously the case in depleted hydrocarbon reser-
voirs, where the well-established practice of CO 2 -enhanced oil recovery
(CO 2 -EOR) relies on using CO 2 -hydrocarbon interactions to increase the
fraction of the oil initially in place (OIIP) that is recovered. Evidence of
signifi cant interaction between CO 2 and organic matter also has been
detected at GCS sites that do not contain exploitable hydrocarbon
resources. For example, at the Frio I carbon sequestration pilot site