Numerical Simulations Of CO2 Injection Into A
Porous Sandstone Formation
Author(s)
J. Cole & V. Rasouli
Abstract
CO2 is sequestered in geological formations by three trapping mechanisms:
solubility, mineral and hydrodynamic trapping. This is to capture and securely
storage the CO2 emissions produced by human activities from reaching the
atmosphere. For this to happen the injectivity of the formation needs to be
evaluated, for which formation permeability and flow properties are important
factors to be determined. Also, relative permeability and residual saturation
should be estimated when two phase flow is injected, e.g. brine and CO2.
In this paper it was attempted to simulate numerically a core flooding lab
experiment conducted to investigate injectivity of a sandstone sample. The
experiment consisted of primary drainage displacement (brine displaced by CO2)
followed by primary imbibition (CO2 displaced by brine) flood. The production
profiles at both injection phases were estimated and the differential pressure
across the sample was recorded.
ANSYS software was implemented in this study to construct a 3D core
sample with similar size to the one tested in the lab. A fine grid mesh was
generated for the model. Both injection phases were simulated numerically using
the lab data. The pressure drop across the sample and the velocity profiles were
extracted. Also, the relative permeability of the two phases was estimated. The
results showed a fairly good agreement with those obtained from the lab
experiments. The results are presented and interpreted.
Keywords: CO2, modelling, relative permeability, ANSYS, CFX.
Keywords
CO2, modelling, relative permeability, ANSYS, CFX.
Related Book
Other papers in this volume
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