Page 113 - Principles of Catalyst Development

94 Principles of Applied Reservoir Simulation

Exercises

Exercise 10.1 Original Volume In Place: Data file EXAM 1 .DAT is a material
balance model of an undersaturated oil reservoir undergoing pressure depletion.
Run EXAM 1 .DAT and find the volume of oil and gas originally in place.

Exercise 10.2 Gas Reservoir Material Balance: Suppose a gas reservoir has the
following production history:

P Z P/Z
G P
(Bscf) (psia) (psia)
0.015 1946 0.813 2393
0.123 1934 0.813 2378

0.312 1913 0.814 2350
0.652 1873 0.815 2297
1.382 1793 0.819 2190

2.210 1702 0.823 2068
2.973 1617 0.828 1953
3.355 1576 0.830 1899

4.092 1490 0.835 1783
4.447 1453 0.838 1734

4.822 1413 0.841 1680

where G> is cumulative gas production, P is pressure, and Z is gas compress-
ibility factor. Draw a straight line through a plot of G P vs P/Z to find original
gas in place (OGIP). OGIP corresponds to PIZ- 0. These results were obtained
from data file EXAM8.DAT. Verify that the OGIP for the model is about 15.9
Bscf by running EXAM8.DAT and finding the OGIP in WTEMP.ROF. How
much oil and water are originally in place?