Large-Scale Geological Carbon Sequestration - Introduction to Carbon Capture and Sequestration - page 510

Section 6
Review
10.1. Reading self-test
1. Which statement is not correct for mixing in fi eld-scale
models?
a. Most models assume that the system is well-mixed within
each simulation block
b. Capillarity fi ngering causes deviations from well-mixed
behavior
c. If a simulation grid block contains more than a reasonable
threshold minimum amount of CO 2 -rich phase, the entire
aqueous phase in the grid block is assumed to be in equi-
librium with the CO 2 -rich phase
d. Weathering reactions involving minerals, water, and CO 2
may be rate-limited by the slow diffusive mixing of these
three components
2. Which statement is correct about grids in a fi eld-scale
simulation?
a. Field-scale simulations are currently being replaced by ana-
lytical models
b. A typical grid size in a fi eld-scale simulation is
1 cm x 1 cm x 1 cm
c. A single core sample represents a region of the formation
large enough to capture the anisotropy of natural
formations
d. Field-scale carbon sequestration models treat each simula-
tion grid block as a plug fl ow reactor
e. Answers B and D
f. None of the above
3. Which statement related to carbon sequestration induced seis-
micity is correct?
a. The natural increase in tectonic stress is augmented by a
CO 2 injection process which may trigger an earthquake