(GP/GT) for Additional Water Supply in the Lower Rio Grande

FLUID PROPERTIES
Gas Gas Water Sol'n Water
Pressure FVF Visc FVF Gas Visco
pSla rb/Mcf cp rb/STB Scf/STB cp
------------ --------- -------- -------- ---------- --------
1000.00 3.1957 .0140 1.0368 5.4 .30
2000.00 1.5359 .0160 1.0338 9.7 .30
3000.00 1.0276 .0188 1.0307 13.2 .30
4000.00 .8084 .0215 1.0276 16.0 .30
5000.00 .6899 .0243 1.0246 18.4 .30
6000.00 .6154 .0270 1.0215 20.6 .30
7000.00 -.5659 .0295 1.0185 22.5 .30
8000.00 .5311 .0319 1.0154 24.2 .30
9000.00 .5047 .0341 1.0123 25.8 .30
10000.00 .4831 .0362 1.0093 27.3 .30
Since the reservoir flow is all single phase water, relative permeability curves
are not needed nor is structure important since the sands will be in hydraulic equilibrium.
This completes the data needed for the reservoir description.
The wells were described using large diameter flow string (5 inch diameter).
The wells were assumed to be completely penetrating with a zero skin. The flow restriction
was 25,000 bblld (approximately 1,000,000 gal/day) or what the well could
deliver against a 5500 psi bottom hole flowing pressure. Surface pressures were then
calculated from those flowing conditions. This results in some slightly anomalous
behavior in some of the performance curves where the rate declines. A slightly increasing
wellhead pressure is computed. This is because the bottom hole pressure is
held constant and the declining fluid rate produces less pipe friction.
Simulation Results
Several simulation runs were made for each of the three identified reservoirs.
First, a single test well perfonnance was calculated for each reservoir for each the
minimum case and maximum case. Then patterns of wells were superimposed on their
reservoir. Each reservoir had patterns of 3, 6 and 9 producing wells.
The results of the single test well simulations are shown on Figures 7-12. These
show that the Mark Sand having the thinnest section begins to decline in rate almost
immediately for both the minimum and maximum reservoir sizes. The Bond Sand
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