Petroleum and Natural Gas Fields in Wyoming Page: 21
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REVIEW OF OIL AND GAS FIELDS
the two main transverse faults in the struc-
ture was a factor in determining the gas-bear-
ing area of the field. The closure is estimated
to be approximately 275 feet. The Baxter
shale at the surface is at an elevation of about
6,375 feet. Gas was discovered in the North
Baxter Basin field in November 1926 in a
well in the NE1/4NE1/4 sec. 11, T. 19 N., R.
104 W., that produced 14 million cubic feet
daily from the Dakota sand at 2,920 to 3,068
feet; the shut-in wellhead pressure was 1,200
p.s.i. In August 1929 a well in the NE1/4
NWi/ sec. 24, T. 19 N., R. 104 W., produced
31/2 million cubic feet of gas from the Mor-
rison formation at 3,504 to 3,528 feet; the
shut-in wellhead pressure was 1,450 p.s.i.
Sour gas in the Nugget standstone was dis-
covered in 1945 in a well in the C NEI4SE1/4
sec. 11, T. 19 N., R. 104. W. In January 1.946
a well in this same quarter section recovered
incombustible gas, composed mainly of carbon
dioxide, on a drill-stem test of the Weber
sandstone. This well was completed in the
Nugget sandstone in March 1946 for an initial
daily production of 5 million cubic feet of gas,
45 barrels of oil, and 8 barrels of water; and
subsequently, in 1954, the well was recompleted
in the Frontier formation.
Initial daily open-flow volumes of gas from
wells in the Dakota sandstones were as high
as 17 million cubic feet, while those from the
Morrison were about 3.5 million cubic feet.
The Nugget sandstone wells initially produced
5 to 22 million cubic feet a day. The depth,
in feet, to formation top, as shown by the
electric log of a well drilled in 1949, was as
follows: Frontier, 2,486; Aspen, 2,710; Da-
kota, 3,036; Morrison, 3,200; Curtis, 3,655;
Entrada, 3,794; Twin Creek, 3,902; and Nug-
get, 4,063. Analysis of oil (condensate) from
the Nugget sandstone is given on page 330.
Analyses of gas from the Frontier, Dakota,
Nugget, and Weber formations are given in
table 8 (p. 287). Analyses of water from the
Frontier, Muddy, Dakota, Nugget, and Weber
formations are given in table 9 (p. 292).
Twenty-one wells have been drilled in the
North Baxter Basin field. 14 of which were
in the productive area. In September 1955
there were 10 producing wells in the field.
These were, by formations, as follows: Fron-
tier, one well; Dakota, six wells; Basal Mor-
rison, one well; and Nugget, two wells. Dur-
ing 1954 the wells in the North Baxter Basin
field averaged 718.000 cubic feet of gas a day,
based on the yearly production. To January
1, 1957, the North Baxter Basin field had pro-
duced 49,850 million cubic feet of gas. A
small amount of condensate is produced with
the gas from the Nugget sandstone, and for
1945 to 1949, inclusive, it was reported as oil
production. During this period, 7,777 barrels
was reported produced. Since that time the
condensate has been sold to farmers and ranch-
ers in the area as tractor fuel and not reported
as crude oil produced.
Gas from North, Middle, and South Baxter
Basin fields is piped to Salt Lake City and
Ogden, Utah, and to a number of cities in
southwestern Wyoming, where it is used for
domestic and industrial purposes. This gas-
transportation system was built in 1929, and
additions were made to the pipeline as new
fields were developed. Flowing pressures of
the wells in September 1955 were sufficient to
overcome the pipeline pressure of 440 p.s.i.
Standard surface equipment at all wells in
the three Baxter Basin fields includes sepa-
rators to remove fluid, heaters (to heat the
gas stream), and dehydrators to remove water
vapor from the gas. Some wells flowed gas
through both tubing and casing, while others
flowed through the tubing only.
Middle Baxter Basin gasfield is in the west-
ern third of T. 18 N., R. 103 W. and sec. 12,
T. 18 N., R. 104 W. In early reports this area
was sometimes referred to as Dry Lake. Struc-
turally it is on the northern part of the south
"high" on the Rock Springs uplift. The
southern field boundary was determined by
ownership and not by structural position. The
area is severely faulted, as shown by the map
Gas was discovered in the Frontier forma-
tion in Middle Baxter Basin on January 23,
1938. The discovery well, in the NW1/4NWQ1,
sec. 30, T. 18 N., R. 103 W., produced initially
2.2 million cubic feet of gas a day from 1,690
to 1,725 feet. In 1.938 gas also was found in
the Dakota formation in a well in the SE1/4
SE1/4SE1/4 sec. 13, T. 18 N., R. 104 W. Initial
daily production was 3.5 million cubic feet of
gas from the depth interval of 2,480 to 2,490
feet. In August 1946 a well in the SE1/4SE/4
SE1/! sec. 6, T. 18 N., R. 103 W., was com-
pleted in the Lakota formation for an initial
daily production of 41.3 million cubic feet of
gas at the depth interval of 2,677 to 2,712 feet.
This is the only well completed in this sand
in the field, and there is some question as to
whether or not this formation is actually the
Lakota. The log of a well in the SE1/ sec.
18, T. 18 N., R. 103 W., drilled in 1946, gives
the depth, in feet, to the top of formations as
follows: Aspen, 1,935; Dakota, 2,304; Fuson,
2,410; Lakota, 2,500; Morrison, 2,520; Curtis,
2,927; Entrada, 3,078; Twin Creek, 3,175;
Nugget, 3,340; Jelm, 3,900; Shinarump, 4,235;
Chugwater, 4,295; Dinwoody, 4,920; Phos-
phoria, 5,197; and Weber, 5,485. Analyses 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/m1/35/: accessed April 27, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.