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30 Principles of Applied Reservoir Simulation
the water terms replaced by gas terms. In general, the gravity term in^ should
not be neglected unless q,' is very high because of the specific gravity difference
between gas and oil.
Exercises
Exercise 3.1 Estimate the parachors for butane and decane.
Exercise 3.2 Derive the relationship between the equivalent height of a transition
zone and pore radius by using Eq. (3.5) to eliminate capillary pressure from Eq.
(3.7).
Exercise 3.3 Suppose kJiS^ ~ k ro(S wc) in Eq. (3.14) and water viscosity is 1
cp. Plot M w 0 versus oil viscosity for oil viscosity ranging from 0.1 cp to 100 cp.
Exercise 3.4 Derive Eq. (3.21) from Eqs. (3.19) and (3.20).