Beauheim 1987 - Waste Isolation Pilot Plant - U.S. Department of ...

3.0
.hl c
El2
2.0
.
v
n
I
P
1 .o
MATCH PARAMETERS
AP
t
= 1.0 psi
= 1.0 hi
PD = 0.062
tdCD =550
I CDe” =I
P’ = 145.5 psia
+ DATA
-SIMULATION
I
I
0.0
0.0 0.5 1 .o 1.5 2.0 2.5
DIMENSIONLESS SUPERPOSITION FUNCTION: FLOW PERIOD 3
Figure 5-49. H-l7/Culebra First Buildup Dimensionless Homer Plot with INTERPRET Simulation
The SBU data log-log plot and simulation
(Figure 5-50) are very similar to those of the FBU data
(Figure 548). The SBU simulation is representative
of a single-porosity medium with a transmissivity of
0.22 ftzlday (Table 5-3). The skin factor for this
simulation is -1 -2, again indicating a moderately
stimulated well. Overpressure skin effects are
evident in both the SBU log-log plot and the
dimensionless Horner plot (Figure 5-51). On the
former, the pressure derivative declines at late time,
and on the latter, the late-time data trend toward a
pressure lower than the static formation pressure of
144.6 psia specified for that simulation. In fact, the
buildup pressure reached a maximum of 143.7 psia
after about 7.5 hr of the SBU (Figure 5-47), and
declined very slightly for the last 8 hr of the SBU.
The data from these last 8 hr are not included on the
analysis plots.
Figure 5-52 presents a semilog plot of the risinghead
slug-test data, along with the best-fit typecurve
match. This match provides a transmissivity estimate
of 0.22 ft*/day (Table 5-3), which is in excellent
agreement with the DST results. The static formation
pressure estimate used to fit the data in Figure 5-52
is 143.0 psia. In actuality, the fluid pressure peaked
at 142.3 psia after 27 hr of the slug test, and declined
slightly thereafter, indicating continued dissipation of
an overpressure skin. The data collected after the
pressure peaked are not included on this plot.
The analyses of the H-17 Culebra tests provide
consistent transmissivity estimates of about
0.2 ftZ/day. Thus, H-17 is not located in the hightransmissivity
zone hypothesized by Haug et al.
(1987) and Bartel (in preparation). This zone, if it
exists, must lie farther to the west towards P-17
(Figure 1-1).
5.2.2.9 H-18. The objective of the Culebra testing
at H-18 was to help determine where the transition
occurs between the high-transmissivity region that
includes WIPP-13 (69 ft2/day; Beauheim, 1987b) and
the low-transmissivity region that includes H-2
(0.4 ft*/day; Mercer, 1983) (Figure 1-1). At H-18, the
Culebra lies from 688.6 to 712.8 ft deep
84