Petroleum and Natural Gas Fields in Wyoming Page: 54
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PETROLEUM AND NATURAL GAS FIELDS IN WYOMING
capable of flowing about 300,000 cubic feet,
and 1 Frontier oil well producing about 2
barrels daily. The Sundance oil well was pro-
ducing 45 barrels of oil and 35 barrels of water
daily. The 55 Embar-Tensleep oil wells were
producing 7,000 barrels of oil and 5,000 barrels
of water daily. One Amsden oil well was pro-
ducing 185 barrels of oil and 350 barrels of
water daily, and the other one was shut in.
Analyses of oils from the Frontier, Sundance,
Embar, Tensleep, and Amsden producing
zones are given on pages 346 to 348. Analyses
of gas from the Frontier formation and of
water from the Frontier, Embar, and Ten-
sleep formations are given in tables 8 and 9
(pages 287 and 293, respectively).
The total volume of gas produced to 1956
was reported to be 40.4 million cubic feet. The
total production of oil to the end of 1956 was
36,254,600 barrels, of which 2,526,693 barrels
was produced in 1956. The gas-bearing area
in the Frontier formation is about 320 acres;
the oil-bearing area in the Embar-Tensleep
zones is about 1,900 acres. The productive
area of the Amsden has not been established.
Using the 1,900 acres as the proved productive
acreage, the recovery per acre to the end of
1956 has been 19,000 barrels of oil.
There are three outlets for the oil from
Byron. A 12-inch line connects the field with
Elk Basin field. From the Elk Basin field the
oil can be transported north to Montana or
southeast to Casper and to Chicago. An 8-inch
line extends southward from the Byron field
to Greybull and Winchester, Wyo., and 8-inch
lines extend from Byron to the refinery and
loading racks on the railroad near Lovell,
The South Byron oil and gas field, in secs.
31 and 32, T. 56 N., R. 96 W., Big Horn
County, is a fault trap on the east end of the
main Byron anticline. This field is considered
by many to be part of the Byron field. The
map of the Byron anticline indicates that 100
to 200 feet of closure against the fault may
exist at the South Byron structure. Sandy
shale of the Fort Union is exposed on the
surface at an elevation of 4,050 to 4,150 feet.
Gas was discovered on the main Byron anti-
cline in 1918, but it was not until August 1950
that oil was discovered in the South Byron
fault trap. The discovery well in the NW1/4
NE1/SE1/4 sec. 31 was completed in the Fron-
tier formation between 2,714 and 2,757 feet for
an initial flow of 200 barrels of 580 API
gravity oil and 1/2 million cubic feet of gas
daily. In January 1951 a well in the SE1
SW1/NE1/ sec. 31 was completed for an ini-
tial open flow of 1 million cubic feet of gas,
1 barrel of oil, and 1 barrel of water daily.
The producing interval was the Frontier for-
mation between 2,708 and 2,795 feet. A well
in the C SW1/NE1/4 sec. 31 was drilled to a
total depth of 6,067 feet in the Madison for-
mation. In this well all zones below the Fron-
tier were either dry or water bearing. The
well log shows the depth, in feet, to the top
of formations as follows: Frontier, 2,699;
Muddy sand, 3,920; Dakota, 4,030; Lakota,
4,412; Morrison, 4,530; Sundance, 4,700;
Chugwater,. 5,010; Dinwoody, 5,571; Embar,
5,600; and Tensleep, 5,694. Analysis of oil
from the Frontier formation is given on page
At least 31 wells had been drilled in the area
by 1958. Of these, 9 were reported as oil
wells, 7 as gas wells, and 15 as dry holes. Dur-
ing 1956, two of the oil wells and most of the
gas wells were being operated. Oil and gas
reported produced at the field in 1956
amounted to 1,595 barrels and 94 million cubic
feet, respectively. Cumulative oil and gas pro-
duction to 1957 was 113,157 barrels and 1,454
million cubic feet.
The oil and gas from the field are piped to
the Byron field.
The Northwest Byron oilfield is in lot 37,
sec. 17, T. 56 N., R. 97 W., Big Horn County,
more than 1 mile from production in the
Byron and Garland fields. The field is in an
area of faulting and is assumed to be a small
stratigraphic trap on a nose of the Byron
anticline. Elevation at the one oil well. is
4,116 feet. The Mesaverde formation is ex-
posed at the surface.
The discovery well, the No. 1 State-Lode-
stone, in the SW1/4SW1/4NW1/4 lot 37 (sec.
17), was completed May 28, 1955. Initial pro-
duction by pumping was 88 barrels of 25
API gravity oil and 35 barrels of water from
the Tensleep sand at 6,172 to 6,180 feet. The
log of this well shows the depth, in feet, to
the top of formations as follows: Cody, 1,288;
Frontier, 3,010; Peay, 3,500; Mowry, 3,600;
Muddy, 4,260; Cloverly, 4,361; Dakota, 4,475;
Fuson, 4,592; Lakota, 4,620; Morrison, 4,730;
Gypsum Spring, 5,412; Chugwater, 5,595;
Dinwoody, 6,085; Phosphoria, 6,103; and
Three other wells, all dry holes, have been
drilled in the area. The discovery well was
producing 18 barrels of oil and some water
daily in January 1957. Analysis of oil from
the Tensleep sand is given on page 349.
Oil produced at the field amounted to 4,663
barrels in 1955 and 5,725 barrels in 1956. The
oil is hauled from the field by truck.
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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/m1/68/: accessed July 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.