Open
File
Report
No. 80
An accurate equilibrium temperature log in No.
AEC8 , a
drill test in the vicinity of the proposed Carlsbad Disposal
sit
by
Arthur Mansure and Marshall Reiter' .
On February 24, 1977 an accurate, ,equilibrium
log
was
run
in
drill
test
AEC
#8,
which
is
in
the
vicinity
of the Carlsbad disposal site. The log was
run from 50 feet
to 4810 feet. Temperature data were taken
at varying depth
intervals with the sonde continuously moving.
At 50 ft,
1000 ft, 2000 ft, 3000 ft, 4000 ft, 4500 ft, andft 4810
the
sondewasstopped to
examine
tool
response
and
wellbore
stability. The sonde is a thermistor device which
is
connected to Mueller bridge electronics
at the surface. The
+to-03OF. Data
measurements are believed to be accurate are
printed
From
out
the
in
graph
this
it
report
is
and
evident
shown
that
graphically.
there
distinct gradient zones. They are approximately:
are
three
1) 50 ft
to 1035 ft, 2) 1056 ft to 4247 ft, and 3)ft4306
to 4810 ft.
The
temperature
gradients
in
these
zones
are
respectively:
1) .85OF/100 ft, 2) .43OF/lOO ft, .and 3) .9l0F/100 ft.
Sandia
Lab
supplied
thermal
conductivity
data
(taken
by
Russel U. Acton, Sandia Lab tech. doc. in prep.) applicable
to the middle gradient zone. The apparent average
of these
values is 5.5W/M-OK
of
the
temperature
or 13.7 mcal/cm-sec-°C.
gradient
and
The product
the
thermal
an
estimate
*j
mean
in
the
middle
zone
yields
2
heat flux at AEC #8; this is 1.07,ucal/cm
-set.
-
conductivity
of
the
geotherma
Acknowledgments
AEC'#8 is under the supervision of Sandia Laboratories.
The
cooperation of Dennis
Powers in arranging the logging
of the well isgppreciated.
with
equipment
32482, the
and the
0
and
NewMexico
New
field
The temperature logs were done
support
Energy
by NSF grant GI
sponsored
Researchand Development Program
Mexico
Bureau of Mines
and
MineralResources.
AEC Y 8 ,
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72.289
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