Petroleum and Natural Gas Fields in Wyoming Page: 12
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PETROLEUM AND NATURAL GAS FIELDS IN WYOMING
completed as a gas well. Since 1932 some gas
has been produced from this well for domestic
consumption in Arminto.
The Lox structure in secs. 34 and 35 appears
to be a dome about 3 miles southeast of the
Arminto structure. The Steele shale out-
crops at an elevation of about 6,000 feet. In
1921 a well drilled in the NW1/4 sec. 35 pro-
duced 3 million cubic feet of gas daily from
the Second Wall Creek sand at 2,068 to 2,088
feet. The well was plugged and abandoned.
In 1920 a dry hole was drilled, apparently off
structure, in the SW1/4 sec. 35.
ASH CREEK AND SOUTH ASH CREEK
The Ash Creek field (fig. 6) is in secs. 23
and 24, T. 58 N., R. 85 W., and sec. 19, T. 58
N., R. 84 W., Sheridan County, Wyo., and sec.
3, T. 10 S., R. 38 E., Big Horn County, Mont.
The South Ash Creek field is in secs. 29, 30, 31,
and 32, T. 58 N., R. 84 W., Sheridan County,
Wyo. The fields are apparently porosity and
permeability pinch-out-type reservoirs on a
structure located by seismograph. At least one
fault trends northeast-southwest across the
field. The Fort Union formation is exposed at
the surface. The terrain in and around the
fields is hilly. Surface elevations at the wells
range from 4,050 to 4,390 feet.
Ash Creek field was discovered on May 19,
1952, upon completion of the No. 1 Elsie
Barry well in the NW1/4NW1/4SW1/4 sec. 24.
Initial daily production by pumping was 174
barrels of 33.70 API gravity oil and 55 bar-
rels of water. Production was from the Shan-
non sand (locally called Ash Creek sand) at
depth intervals of 4,715 to 4,721 and 4,746 to
4,750 feet. The top of the Shannon sand was
logged at 4,714 feet.
The Shannon sand is described as being
fairly soft, composed of medium to large sub-
angular clear quartz grains and slightly glau-
3 2 I 10
" 19 20 21
30 29 _28+ 58
* OIL WELL, SHANNON
* GAS WELL
4 DRY HOLE
FIGURE 6.-Map of Ash Creek and South Ash Creek Fielas, Sheridan County, Wyo., and Big Horn County, Mont.
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Biggs, Paul & Espach, Ralph H. Petroleum and Natural Gas Fields in Wyoming, report, 1960; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc38797/m1/26/: accessed March 29, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.