CO2 Sequestration
[CO2-plume spread; viscous, gravity and capillary forces]
To what extent, the aquifer/reservoir rock properties
collected from the near-well region (through well-logging or coring); and
the relative-permeability and capillary-pressure curves
measured from laboratory using small rock samples,
will remain to be useful
in forecasting large-scale CO2 migration,
where the CO2-plume could extend
over hundreds of square kilometers,
even before the injection period stops (10 -30 years)?
And, how about the forecast of CO2-plume spread
for the post-injection period
that could span
hundreds and thousands of years and longer?
Having known that gravity and capillarity is expected
to play a dominant role in dictating the flow behavior
in the post-injection period,
how long viscous forces would remain to be dominant
during the injection period (in the vicinity of the injection well)?
When exactly gravity and capillarity begin to influence the displacement front – during the injection period?