Microseismic Monitoring and Geomechanical Modelling of CO2 - bris

5.5. SURFACE UPLIFT
Figure 5.17: Map of surface uplift above the medium stiffness small model 1z:5x:5y. The uplift
here is so small that it is lost in numerical noise.
As important as the magnitude of uplift is the shape of the uplifted region. It is clear from Figures
5.15 to 5.17 that the uplift closely matches the shape of each reservoir, where the pressure plume has
propagated even though the CO 2 has not. This may therefore be a useful tool for identification of
reservoir compartmentalisation or flow in channels, provided the shape of the uplift can be constrained
well enough to image reservoir features.
1z:100x:100y 1z:100x:5y 1z:5x:5y
Soft 6.4 0.41 0.20
4.8 0.61 0.17
Medium 1.3 0.11 0.06
1.1 0.16 0.03
Hard 2.4 0.13 0.07
1.4 0.16 0.04
Table 5.4: Maximum surface uplift above each of the model reservoirs (in cm). The values in blue
are for the deep reservoirs, in red are for the shallow models.
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