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interbedded with dark basinal shales or scattered, thin basinal sandstones (Anderson,
1977).
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XI-30
Two oil and gas pools he ~ been discovered within the nine-township study
area (Fig. 42; Table 14).Uileconomic volumes (shows) of oil and gas have been
recorded from three additional wells (Fig. 4" Both pools consist of a single
productive well. Cumulative production from the Wolfcamp in the nine-township
study area is 15,692 BO, 9884 MCF gas. and 760 bbls brine water. No oil or gas has
been produced from under the WIPP land withdrawal area or the one-mile wide
additional ",; area.
The Bilbrey Wolfcamp gls pool, located in sec. 18 1'21S R32E, was discovered
in 1985. Discovery was made by re-entry into an abandoned Morrow gas well.
The interval '1m 12,100 to 12,138 ft was perforated and acidized. This interval is
approximately 1000 ft below tte top of the Wolfcamp. Initial potential was reported
as 26 MCFG per day with an unreported volume ()l condensate. AP~ gravity of the
condensate was 47.9°. Cumulative production as of December 31, 1993 was 11,683
bbls condensate and 9884 MCF gas. Production in 1993 was 1101 bbls condensate
and no gas. Subsequent to discovery, the pool has not been developed or defmed by
additional drilling.
The ",m1ondtail Wolfcamp oil pool, located in sec. 14 T23S R32E, was
discovered in 1981 by a wildcat well that was unsuccessfully drilled for gas in the
Morrow and Atoka. After unsuccessfully teSting the Morrow and Atoka. the well was
completed in the Wolfcamp through perforations from 12,181 throug1112,193 ft. The
perforated im:::';al is approximately 200 ft below:1e top of the Wolfcamp. After
perforation, the Wolfcamp was acidized and arL'~lally fractured. Initial potential was
reported as 38 bbls oil per day with a gas-oil ratio of 1974. API gravity of the oil
was 48.8°. The well produced until 1987 when it was recompleted as a Bone Spring
producer in the Diamondtail Bone Spring pool. Cumulative production from the
Wolfcamp was 4009 bbls oil and 279 MCF gas (Table 14). The high gravity of the
oil raises t: '1uestion of whether this·¥as a lIue oil well or a gas well with significant
producm>,; of condensate. The extent of the Diamondtail Wolfcamp pool has not
Been defined by additional drilling.
Probable resou.tl:eS of oil and gas are not estimated for the Wolfcamp Group.
However. it is highly likely that possible resources exist under the WIPP land
withdrawal area in undiscovered pools. The position of the WIPP Site in the Delaware
Basin and the recovery of hydrocarbons from wells in the srudy area indicate undiscovered
hydrocarbons will most likely be gasw1ih condensate. Traps~will be stratigraphic
or possibly combination sttueturaIJstratigraphic traps formed by updip
porosity pinchouts on the east-plunging structural nose that occupies a large part of
the WIPP land withdrawal area (Fig. 42). Oil, gas, and condensate resources will
probably be relatively minor compared with those in major producing units in the area