Page 174 - Principles of Applied Reservoir Simulation 2E
P. 174
Part II: Reservoir Simulation 159
Figure 16-2. Grid orientation.
Techniques are available for approximating the vertical distribution of fluids
in 2D cross-sectional and 3D models by modifying relative permeability and
capillary pressure curves. The modified curves are called pseudo curves. Taggart,
et al. [1995] present a discussion of several pseudoization techniques and their
limitations. An example of a pseudoization technique is the vertical equilibrium
(VE) approximation. The principal VE assumption is that fluid segregation in
the vertical dimension is instantaneous. This assumption is approximated in
w
/
T
k
Figure 16-3. Example of a 3D "layer
cake" grid.
