Beauheim 1987 - Waste Isolation Pilot Plant - U.S. Department of ...
Beauheim 1987 - Waste Isolation Pilot Plant - U.S. Department of ...
Beauheim 1987 - Waste Isolation Pilot Plant - U.S. Department of ...
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Fortv-niner Anhvdrite. The upper anhydrite and<br />
gypsum unit <strong>of</strong> the Forty-niner Member lies from<br />
359.5 to 390 ft deep at H-14 (Figure 3-6). The unit is<br />
roughly 75% anhydrite and 25% gypsum, based on<br />
interpretation <strong>of</strong> a neutron log. The unit was tested in<br />
a DST straddle interval extending from 356.0 to<br />
384.5 ft deep. Thus, the bottom 3.5 ft <strong>of</strong> the Dewey<br />
Lake Red Beds and the Dewey Lake/Rustler contact<br />
were included in the test interval. Descriptions <strong>of</strong> the<br />
test instrumentation and the test data are contained<br />
in Stensrud et al. (<strong>1987</strong>).<br />
The Forty-niner anhydrite was tested from October<br />
14 to 15,1986. Because the anhydrite was expected<br />
to have too low a permeability to allow quantitative<br />
testing over the few days available for testing, no<br />
pressure-equilibration period preceded the testing.<br />
Instead, as soon as the packers were set, the tubing<br />
was swabbed with the shut-in tool open, and the test<br />
interval was left open to the tubing for about 16<br />
minutes for a flow period (Figure 5-100). Very little<br />
fluid entered the tubing at this time. The test interval<br />
was then shut in for about 16.5 hr. The pressure<br />
increased by about 1 psi over the first 1.5 hr <strong>of</strong> the<br />
buildup, and by only another psi over the last 15 hr.<br />
At that time, the testing was terminated. The Fortyniner<br />
anhydrite was judged to have a permeability<br />
much lower than that <strong>of</strong> the claystone, and<br />
quantitative testing <strong>of</strong> the anhydrite appeared to<br />
require weeks to months <strong>of</strong> effort.<br />
5.2.5.2 H-16. At H-16, only the medial clayey<br />
interbed <strong>of</strong> the Forty-niner was tested. At this<br />
location, this interbed is composed largely <strong>of</strong> clay,<br />
and is indurated to a claystone only in minor<br />
intervals. The clay lies from 562.6 to 573.8 ft deep<br />
(Figure 3-8), and was tested in an interval extending<br />
from 560.4 ft to the then-bottom <strong>of</strong> the hole at<br />
580.7 ft. The portions <strong>of</strong> the test interval overlying<br />
and underlying the clay are composed <strong>of</strong> gypsum<br />
E a0<br />
PRESSURE ABOVE TEST INTERVAL<br />
/ . ...... ..<br />
45<br />
30<br />
15<br />
L<br />
-<br />
-<br />
-<br />
.<br />
FFL<br />
\\<br />
FEU<br />
.....<br />
1<br />
0 L 4 6 8 10 12 14 16 18 20<br />
Start Dote: 10/ 14,'1986<br />
Start Time: 14: 00: 00<br />
Elopsod Time in Hours<br />
Linear-Lineor Sequence Plot<br />
H-14/FORTY-NINER ANHYDRITE TEST<br />
Figure 5-1 00. H-14/Forty-Niner Anhydrite Drillstem Test Linear-Linear Sequence Plot<br />
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