Petroleum and Natural Gas Fields in Wyoming Page: 15
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REVIEW OF OIL AND GAS FIELDS
to drilling for water at Spring Valley. From
the date of initial discovery to 1954 at least
100 wells have been drilled in the Spring Val-
ley area; about 30 were productive, yielding
initially 1 to 100 barrels of oil daily. The
gravity of the oil from the Frontier formation
and the Aspen shales ranged from 20 to 440
API, and that from the Bear River sand was
22 API. Production from the Frontier for-
mation came from a 5-foot sand at 800 to 1,400
feet; in the Aspen shale, at 500 feet (on the
east) to 2,300 feet (on the west), the pro-
ducing zone being 10 to 36 feet thick; and in
the Bear River sand, at 800 to 900 feet, the
productive zone being 10 to 30 feet thick.
The log of a well drilled on the crest of
the Meridian anticline north of Spring Valley
field near LeRoy, in the SE1/NE /4NE1/4 sec.
32, T. 16 N., R. 117 W., shows the depth, in feet,
to the top of formations as follows: Twin
Creek, 884; Nugget, 1,408; Ankareh, 2,167;
Thaynes, 3,009; Woodside, 3,709; Phosphoria,
4,480; Weber, 4,693; Amsden, 5,422; and Madi-
son, 5,722. This well, a dry hole, was drilled
to a total depth of 6,201 feet in the Madison
and had a ground elevation of 6,801 feet.
About 5 miles north of production in the
Spring Valley field, in an area called Spring
Gap, a noncommercial well produced 3 barrels
of oil a day from the lower Frontier forma-
tion in 1949. This well is in the C E1/2SE1/4
NE1/4 sec. 18, T. 16 N., R. 117 W. Analysis of
oil from the Aspen shale and Bear River for-
mation in Spring Valley field is given on page
Production for 1956 was reported as 2,050
barrels of oil. About 217,000 barrels has been
produced from the field. Some 175,000 barrels
of this oil was produced before 1925, and ac-
curate records are not available.
In 1907 a 125-barrel topping plant was put
in operation about 3 miles north of the town of
Spring Valley on U. S. Highway No. 30. It
was operated intermittently for many years.
The products were sold to :ranchers in the sur-
rounding area. In 1909 oil was first shipped
to Salt Lake City for refining.
The Sulphur Creek field is in secs. 14 and
23, T. 13 N., R. 119 W. The discovery well in
the SE1/4 SE1/4SE1/ sec. 14 was completed in
November 1942, with production from the Bear
River formation at 660 to 674 feet. The ground
elevation at the well is 7,700 feet. At least 15
wells have been drilled in the field, only 1 of
which is deeper than 2,000 feet. Analysis of
oil from the Bear River formation is given on
page 326. The cumulative production of oil to
January 1957 was about 17,700 barrels.
The Stove Creek field is in secs. 26 and 27,
T. 14 N., R. 119 W., north of the Sulphur
Creek field near the Absaroka fault. The only
well from which it is known that oil has been
produced is in the NE1/4SW/4NE1/4 sec. 26.
Locally, the well is called the "Chinaman's
well." Analysis of oil from this well is given
on page 327.
In 1949 a well in the NE1/4SE14NE1/4 sec.
27 was drilled to 5,591 feet. A show of oil
was encountered in the Aspen formation at
4,945 to 4,950 feet. The top of the Bear River
formation was 5,312 feet. Ground elevation
at the well is 7,500 feet.
No oil has been reported sold from Stove
The Badger Basin oilfield (fig. 8) in the
west half of T. 57 N., R. 101 W., Park County,
is on a dome with approximately 100 to 150
feet of productive closure. The flanks of the
surface structure dip uniformly outward from
the crest at angles of 2 to 4. The Fort Union
of Tertiary age is the surface formation at an
elevation of about 4,275 feet near the crest of
the structure. Apparently the surface struc-
ture (as shown in fig. 8) is not reflected in
the lower beds. There are indications that a
faulted condition exists that cuts off some areas
from the rest of the field, as shown by "dry
holes" in unexpected places.
In July 1931 a well in the SW1/NE1/4 sec.
17, completed at 8,723 feet, flowed 55 barrels
of 50 API gravity oil and 1/4 million cubic
feet of gas daily from the Frontier formation
at 8,250 to 8,295 and 8,490 to 8,591 feet. When
the well was shut in, the wellhead pressure
built up to 3,000 p.s.i. within a week and had
to be released because of inadequate wellhead
equipment. This well attracted attention be-
cause it was drilled with cable tools to 8,723
feet, with an open hole for an interval of 4,182
feet at 4,044 to 8,226 feet. Oil was found in the
Dakota sand in a well in the C NE1/4NE1/
sec. 17. This well was completed in 1952 and
produced at the rate of 20 barrels a day. The
deepest test was drilled in 1947, when a well
in the NE1ANW1/4 sec. 27 'penetrated 458 feet
into the Madison limestone at a total depth
of 11,827 feet. The log of the well showed
the depth, in feet, to the top of formations
as follows: Mesaverde, 5,150; Cody, 6,430;
Frontier, 7,868; First Frontier sand, 8,008;
Second Frontier sand, 8,200; Third Frontier
sand, 8,338; Muddy sand, 9,157; Chugwater,
10,395; Tensleep, 11,028 (hard and tight);
Amsden, 11,200; and Madison, 11,369 (sulfur
In 1956 the six wells producing from the
Frontier formation were flowing 80 barrels of
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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/m1/29/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.