, 1922-08-01

and gas development.
Generally speaking large possibni.
ties OF oil and gas production have
been opened up in these fields within
the last two years. The Little Lost
Soldier field. which Is the original
field Of this district. has increased its
daily production from about 1000 bar
rcls TO 5000 barrels n the size Of
The field has beez . ?. eased from 40
acres TO probl5ly 400 acres and posi-
bly, 450 acres.
A new gas field called the VERT
dome. located in the northwest corner
% township % N. range SO w. about
~ miles cast OF the Little I.os Sol
der field. has been opened VI and is
producing IN n well about so million
cubic feet per day. In tho Mahoney
dome another gas field. II which men
ton was made in the former press
bulletin. now contains five gas wells
averaging aroun so million cubic feet.
Since the last publication on these
fields, a a pipeline has been CON
structed from this district to Casper
NY the Producers and Refiners corpor.
alton and a large amount OF this gas
IS now being used at the resineries.
Probably about rs per sent OF the gas
taken out and going into his pipeline
is from the wertE dome; the balance
being from h Mahoney dome. The
old 4-inch oiiline from the Lost Sol
der field is being replaced by n 6-lnch
line and h finch line will probably
be used for piping gas to Rawlins.
In the North Ferris field new devel-
opment has opened UP oil production
in tho Dakota sand. which was form.
erly thought to he entirely gas produc.
ing. II appears tina below the gas
pool there is a fringe OF oil somewhat
similar TO hat in the Lance Creek
field, and at least one Of the gas wells
is now producing oil, and another we'll
drilled outside OF the gas zone in the
NWk Of section 20. township &c N.
range 81 ", recently came in for
about $50 barrels and IS now produc.
ing about $50 barrels OF oil per day.
7he gas well located on section SO of
this township. which is changing into
en- oil well. is barely in the top u the
sln'l II VIII be drilled deepH. with
r. probability OF "a very substantial
production.
This North Ferris field. although d
small structure, now shows rather
large possibilities in the way Of III
ture oil production. Formerly It was
thought that only a very limited pro
duction could be expected and that
would be from the sandy horizon in
h Mowry shale. It was believed that
the Dakota would be entirely a gas
producing and and thai the field
would be rather small in area and ca.
pacity.
There is nothing very much in the
w a of new development in the South
Ferris or General Petroleum field.
Two wells in the Nwk of section l6,
township 25 N, range Sc w. are pro.
ducing about IS to 40 barrels each, and
another we'll in the Swk OF section
Q Of this township is producing a like
amount. Several new wells are now
being drilled in this field and n num-
der has been abandoned. Present con.
ditons indicate a small producing
sroa in the NwA of section 1s and
the SwA OF section 8. township 25 N,
range Sc w.
South of this field some new work
is being don't on the O'Brien Springs
anticline in townships "a and %,
ranges So and ST. A number OF wells
are being drilled on this structure. but
SC far. tho tests have not peer com
pIeted. A small gas production was
found at the depth OF about 5000
feet. supposedly in the Frontier for
nation. Efforts are being made TO
drill down to the Dakota sand in the
hope OF getting oil.
Little Lost Soldier Field.
The most important structure from
an economic standpoint is the Little
Lost Soldier dome located in the north
eastern part Of township 26 N. range
80 W. Although on the genera anti.
cline fold paraIleling the Ferris noun.
tains, this dome is a distinct and sep,
arate structure from the others to be
described in this article.
i, The apex OF this dome is located in
the SEA of the NEk of section 10.
The mjaor axis trends northwest and
southeast, and the northeast flank is
intersected by a number OF very pro.
nounced faults, which do not appear
on the opposite. This field lies at the
extreme northwest end of the elon.
gated basin south OF the Ferris Noun.
tains, and Is surrounded on three sides
by an escarpment. The surface forma.
ion in the floor of this part of the
basin are the Niobrara and the Steele
Ehale. The escarpment is made up OF
the r~idge-forming sa~ndstoues OF the
Mesayerde formation which is well
marked by the so-called Teapot sand
one or white sugary sandstones. re
sembling the Teapot sandstone in the
Big Muddy and Salt Greek areas. The
dips are very steep on all sides rang.
ing from 20 TO As degrees. the greatest
dips being on the northeast flank.
It is interesting to note that there
are four sands or sandy horizons pro.
ducing oil in tine Frontier and lower
Benton formatins and in addition. an.
other oil producing sand in the Now
ry shale and still another in the Da.
kota or upper CloTerly. All of these
sands are found at comparatively shall.
low depthss ranging from 265 feet to
1866 feet. By far the heavies produc.
ton is coming from the two lower
sands. There about 80 wells in
the field, and of this number. five are
deep wells aud capable Of producing
$500 barrels per day. or considerably
more than one-hslf of the capacity pro
duction of the field
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