Page 170 - Principles of Applied Reservoir Simulation 2E

Part II: Reservoir Simulation 155

run controls in Chapter 24,8. The initial bubble point pressure is also described
in Chapter 24.6. What effect does this have on the duration of the ran?

Exercise 15.3 Data set EXAM3.DAT can be used to study the numerical
dispersion associated with a Buckley-Leverett type waterflood of an under-
saturated oil reservoir. Run EXAM3.DAT with constant timesteps of 5 days,
10 days, and 15 days. Rerun the problem with timestep size beginning at 5 days
and allowed to vary from 5 days to 15 days. Make a table showing water
breakthrough time (time when the model reaches a water-oil ratio of 0.1) for each
case. Timestep controls are discussed in Chapters 24.8 and 25.1.

Exercise 15.4 Data set EXAM7.DAT is one version of the Odeh [1981] SPE
comparative solution problem. Run EXAM7.DAT and compare the results to
those reported by Odeh. What is the WINB4D material balance error? The
material balance error associated with this data set provides a good test of the
quality of WINB4D relative to other programs based on the original version of
BOAST [for example, Fanchi, et al., 1982; Fanchi, et al., 1987; Louisiana State
University, 1997].

Exercise 15.5 Data set EXAM10.DAT illustrates the use of PVT and Rock
regions in WINB4D (see Chapter 24.4). Run EXAM 10.DAT and determine the
number of regions in the data set.