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

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5.2.5 Forty-niner Member. The Forty-niner
Member of the Rustler Formation was tested in wells
H-14 and H-16. The objectives of the testing were to
obtain hydraulic-head and transmissivity estimates.
The hydraulic-head measurements are particularly
important in helping to determine whether or not
water from the Dewey Lake Red Beds, and by
extension from the surface, can be recharging the
Magenta and Culebra dolomites at the WlPP site.
The transmissivity estimates allow an evaluation of
the ability of the Forty-niner to provide water to the
WlPP shafts, as well as providing data for crosssectional
or three-dimensional modeling of
groundwater flow in the Rustler.
5.2.5.1 H-14. Two sets of Forty-niner tests were
performed at H-14, tests of the medial
claystone/mudstone/siltstone unit (hereafter referred
to simply as claystone) and tests of the upper
anhydrite unit. The claystone tests were to provide
data on the hydraulic head and transmissivity of the
most permeable section of the Forty-niner. The
anhydrite tests were intended to verify the
assumptions that the Rustler anhydrites are much
less permeable than the claystones, and that they
cannot be tested on the time scale of days.
Fortv-niner Clavstone: At H-14, the claystone portion
of the Forty-niner lies between 390 and 405 ft deep
(Figure 3-6). The claystone was tested in a DST
straddle interval extending from 381.0 to 409.5 ft
deep. Thus, about 13.5 ft of Forty-niner anhydrite
and gypsum were included in the test interval.
Descriptions of the test instrumentation and the test
data are contained in Stensrud et al. (1987).
The Forty-niner claystone was tested on October 13
and 14, 1986. Testing consisted of two flow periods,
two buildup periods, and a rising-head slug test
(Figure 5-95). The FFL lasted about 18 minutes, and
135 -
1
PRESSURE ABOVE TEST INTERVAL
. -....-......- ............................................................................ -.--
120
lB5 t
c
..
90
ffl a
- PEAK AT 67.9 psia
_r 1 I, .F rr
rchn HI 00.2 psia
L
0
75 -
60 -
45
-
30 -
15:
. .
FFL SFL
PUT-IN
SWABBED
... .......................................................................................... -
.................
........
cL _
0
.\
SLUG
Figure 5-95. H-l4/Forty-Niner Claystone Drillstem and Slug Testing Linear-Linear Sequence Plot
119