Large-Scale Geological Carbon Sequestration - Introduction to Carbon Capture and Sequestration - page 511

b. In well-chosen sequestration sites, it is advised to reinforce
the structures of newly built houses to prevent minor dam-
age from induced earthquakes
c. It is a well-known fact that caprock integrity will be compro-
mised by induced seismicity
d. Induced seismicity occurs because of injection of gasses,
not because of the extraction of gasses

4. Which statement related to the CO 2 leakage fl ux from a
sequestration site and the typical natural ecological CO 2 fl ux
driven by photosynthesis is not correct?
a. A typical ecological CO 2 fl ux is 4.4 10 − 7 kg s − 1 m − 2

b. The ecological fl ux of CO 2 is equivalent to a leakage of ca
0.1% per year of a typical sequestration site containing 4 x
10 9 kg CO 2
c. Trees die if the CO 2 mole fraction above a leakage site exceeds
0.3
d. On the order of 10 5 -10 6 kg of CO 2 per year, areas of radius
100 m would be required to exceed a leakage fl ux equal to
the typical natural ecological CO 2 fl ux
e. The larger the radius over which leakage occurs, the higher
the risk for high concentrations in the shallow subsurface

×

10.2. Carbon sequestration hazards

4

2

5

3

1

Figure from [10.36].