There have been numerous computer-based simulation studies carried out
on the subject of CO2 geo-sequestration. However, the amount of
experimental data available in the literature on this topic, especially
with regards to multiphase flow characteristics of fluid-rock systems
during such processes, is very limited. This research was carried out
with the aim of providing a better understanding of the multiphase fluid
flow characteristics of fluid-rock systems during the geo-sequestration
process.
The ultimate goal of this research was to experimentally evaluate the
change in a number of multiphase flow characteristics of the system over
time caused by the potential chemical and physical/mechanical processes
occurring during deep CO2 disposal. In order to achieve this goal the
effects of cyclic/alternating CO2-brine flooding, flow direction,
existence of residual hydrocarbon (natural gas) and change in the
reservoir stress field on the system's multiphase flow behaviour were
investigated.
Until completion of this study there were no experimental data published
in the literature addressing the above mentioned issues and the results
obtained, and published within this thesis were the first of their kind.