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

1 .o
0.9
0.8
0.7
1
MATCH PARAMETERS
- p' = 154.50 psi8
pi = 52.86 psia
-
a = 10-8
p =I
0.6
0
5 0.5
I
0.4
0.3
0.2
0.1
0.0
103 10-2 10' t 00 10'
ELAPSED TIME, hours
102
Figure 5-58. H-l8/Culebra Slug-Test Plot
5.2.2.10 WIPP-12. Two falling-head slug tests of
the Culebra were conducted at WIPP-12. The first
test was initiated on December 22, 1987, and the
second test was initiated on Januaty 8, 1988. The
fluid-pressure data from these tests will be reported
in Stensrud et al. (in preparation). During each test,
approximately 95% of the induced pressure
differential was dissipated in 17 to 19 hr. The data
from these periods fit the analytically derived type
curves well. After 17 to 19 hr, however, the rates of
recovery slowed for an unknown reason, causing
deviation of the data from the type curves. Inasmuch
as the test recoveries were nearly complete when
these deviations occurred and the analyses of the
data collected before these deviations provided
consistent results for the two tests, the late-time (Le.,
after 17 to 19 hr) data were ignored during analysis.
A semilog plot of the data from the first slug test,
along with the best-fit type-curve match, are shown in
Figure 5-59. This type-curve match provides a
transmissivity estimate of 0.10 ftzlday for the Culebra
at WIPP-12 (Table 5-3). The same type curve and a
similar match were used to fit the data from the
second test (Figure 5-60). The transmissivity
estimate provided by this match is 9.7 x 10-2 ftz/day
(Table 5-3), similar to that from the first test.
5.2.2.1 1 WIPP-18. To evaluate the transmissivity
of the Culebra at WIPP-18, a falling-head slug test
lasting slightly over 46 hr was initiated on May 21,
1986. The fluid-pressure data from this test are
reported in Saulnier et al. (1987). About 95% of the
induced pressure differential was dissipated during
the test. Figure 5-61 shows a semilog plot of the
falling-head slug-test data, along with the best-fit type
curve. This fit provides a transmissivity estimate of
0.30 ft*/day (Table 5-3).
5.2.2.12 WIPP-19. The transmissivity of the
Culebra at WIPP-19 was evaluated by performing a
falling-head slug test. The test was initiated on May
31, 1986, and lasted approximately 94 hr. The fluidpressure
data from this test are reported in Saulnier
et al. (1987). About 98% of the induced pressure
differential was dissipated during the test.
90