Fluids and Rocks - Introduction to Carbon Capture and Sequestration - page 409

Table 9.5.1 Capillary breakthrough pressure of CO 2 in reser-
voir and seal rocks

p c,b (MPa) Porous medium

Reservoir rocks

0.01 to 0.1 generic sandstone used in fi eld scale models

Seals

0.21 to 1.85 mudstone

0.64 marlstone

0.74 limestone

3.5 to 4.3 powdered claystone

5.0 to 11.2 evaporite

0.8 to 12.0 generic seals used in fi eld scale models

Capillary breakthrough pressure ( p c,b ) of CO 2 measured in core samples
of reservoir and seal rocks. Data from Hildenbrand et al. [9.15]; Li et al.
[9.16]; Wollenweber et al. [9.17]; Skurtveit et al. [9.18] .

Table 9.5.2 Capillary breakthrough pressures
of several caprock samples

γ gw (mN m -1 ) System p c,b (MPa)

Sample 1

CO 2 /brine 9.2 21

N 2 /brine 27.9 57

Sample 2

CO 2 /brine 11.2 20

N 2 /brine 29.7 56.4

Sample 3
CO 2 /brine 5.0 25.1
CH 4 /brine 12.8 57.4
Capillary breakthrough pressures of caprock samples,
with corresponding values of the fluid-fluid interfacial
tension measured with different non-wetting fluids
(CO 2 , N 2 , or CH 4 ). Data on core samples obtained by Li
et al. [9.16] .