Figure I Generalized map of the Wilbur Mining ... - University of Utah

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300m TEST WELLS
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Two 300m test wells were drilled on University
land adjacent to Las Alturas under the supervision
of L. Chaturvedi of the Civil Engineering
Department at NMSU. The wells were sited on the
basis of the interpretation of the data from the
shallow gradient hole profile, at the locations
shown in Figure 1, based on the following logic.
The first test well, DTI, was sited 100m east
(downdip on the assumed fault) of the apparent
peak of the anomaly defined by the temperature
gradient profile. With this well it was hoped to
intersect and stay in the anomaly source to total
depth. The second well, DT2, was drilled 0.4
miles west of DTI along the profile, between
shallow wells HMSU-7 and -8. This site was selected
so that if the interpretation of the source
of the anomaly as a narrow fault-controlled zone
of rising hot water were incorrect, this well
would intersect a more laterally extensive source
at a greater depth from DTI, but at a closer
distance to the potential user, the NMSU campus.
If the narrow fault source interpretation were
correct, however, DT2 would provide information
about the lateral flow from the system, and act as
a site for a reinjection well, if required. Wells
DTI and DT2 were drilled in December 1978 and
January 1979 and completed as temperature test
wells at depths of 300 and 360m respectively with
two-inch water filled casing.
Temperature data from the two 300m test wells
are shown in Figure 4. The first well, DTI,
TEMP CO
26 28 30 32 34 36
NMSU SH/lLLOW GEOTHERMAL TEST
BOREHOLE TEMPERATURE LOGS
\ , \ ^ ^ 0 \ ^ LOGS WITHIN 72HRS OF DRILLING
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320°C/krn—1 TT L-4 33 .c/km