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

5.2.2.21 below) and DOE-2 (Beauheim, 1986). Those
wells exhibited restricted interporosity flow, with
delayed transition between flow from the fractures
only and flow from the fractures and matrix
combined, and less negative skin factors (-6.0 and
-4.7). The cause(s) of these differences in behavior
is not understood at the present time.
Because the Poker Trap well did not respond to the
pumping at H-8b (INTERA Technologies, 1986), no
storativity value for the Culebra was obtainable from
the test. The failure of either the Magenta in H-8a or
the Rustler-Salado contact in H-8c to respond to the
Culebra pumping at H-8b indicates that any existing
communication between the Culebra and those units
is of a degree too low to allow observable responses
on the time scale of this test.
5.2.2.4 H-12. Although H-12 was completed in
1983, no well-controlled hydrologic testing of the
Culebra had ever been performed. Pressure data
were collected during a water-quality sampling
exercise in 1984 (INTERA and HydroGeoChem,
1985), but the data were inadequate for interpretation
and provided only a qualitative indication of low
transmissivity. Thus, two falling-head slug tests were
performed in August and September 1987 to provide
estimates of the Culebra transmissivity at H-12.
The first test was initiated on August 27, 1987, and
the second test on September 1, 1987. The data
from these tests are presented in Stensrud et al.
(1988). Complete recovery from the induced
pressure differential was obtained during each test.
Figure 5-24 shows a semilog plot of the data from the
first test, along with the best-fit type-curve match.
This match provides a transmissivity estimate of
0.18 ftzlday (Table 5-3). The same type-curve match
also fits the data from the second test quite well
(Figure 5-25), resulting in an identical transmissivity
estimate.
Figure 5-24. H-l2/Culebra Slug-Test #1 Plot
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