, 1922-08-01

basin and just east Of the Lost Soldier
narrow syncllne. II lies on the same
comparative level oor with the other
field. and also has its axis northwest
and SOUTHEAST. This structure lies
more nearly on the major axis OF the
fold. Its extenton Is probable in Inc
with that Of the Mahoney dome TO the
southeast.
The wertz dome Is a gas tield and
covers about 700 acres Ct and. The
well drilled In section Z. township 2s
y, range SO w. heretofore described
as the wertz well. is the only de-
velopment in the field.
Mahoney Dome.
&C next structure In
going from the Wertz dome in a south
easternly direction IL the Mahoney
dome. which is located IN the southern
part OF township 20 N. range IS w.
and the southwest part OF township
20 ". range 81 W. 1t Is a long mar.
row structure with the major axis
almost east and west. and probably
about four sections have been proven
TO he gas bearing. Gas wells arc To-
Gated on sections IS. - and 80. town
ship &c y. range IS w. and IN section
81. township rs N. range 81 w.
The Niobrara and Steele formations
sre exposed on the surface in this
structure and the Fesaverds outcrops
u mile and a hall north OF the field.
The dips are mllder than in the Lost
Soldier structure. ranging from four
degrees TO 10 degrees on the south and
from 40 degrees to so degrees on the
north.
In this structure the Frontier sand
appears to be dry. The first is found
at 1850 feet. the next at 1900 feet
ana the third az about 1850 feet.
They are so. &C and 80 feet thick, re.
~spectively. The Dakota sand which is
found at n depth OF about $500 feet Is
81 feet thick and is the reservoir Of
the gas.
h field is destined to be one of the
principal gas fields OF the state and
already has a capacity of 100 million
feet per day. Plans are on foot to pipe
gas from the field to RawlIns and 9TH.
er towns along the Union Pacific. 1t
IS quite within the realm of possibili.
ties that eventually gas from this dis
triet Will be piped as far as LARAMIE.
Cheyenne and Denver. especially II
lther important gas fields are brought
n. in southern or south central Wyo.
mng.
North Ferris pone.
The North Ferris dome. located in
sections rs and SO. township 2e n.
range 81 W. and sections 30 and 81,
township 26 N, range Sc w. is an
other small structure trendlng in a
southeast northwest direction. The
apex of the dome is. near the center
OF section rs and the surface forma-
ton Is Niobrara and Benton shale.
A small production OF oil was found
in n OF the Frontier sands in the
SWA of section 30. township 2s N.
range SO W.. at a depth of about $40
teet. but this has not been a CONNER
cial well for some time. Several wells
near the center OF section rs are pro.
ducing from the lower Benton and
Mowry sands at depths ranging from
1900 TO 1900 feet, A gas wei, in sec.
ton SO. township rs N, range 81 w.
h a is now producing oil, was first
drilled 10 a depth of 2,I20 feet and
vas afterwards deepened to s.1s4 feet
A new well drilled in the NWA of
section 20 to a depth of about 1900
feet is believed to b. in the Dakota
SAND which wa found to be n gas
sand In the Mahoney and wertz
ZONES n which was also believed to
be gas producing in this field.
This discovery OF oil tends to en-.
large the possibilities of this field and
also gives certain encouragement TO
prospectors to drsll on the TANKS of
the Mahoney and Wertz structures
with the idea of finding oil outside of
the a zone 1t is probable that the
oil production from the North Ferris
field will be increased from a few hun.
dred to a thousand barrels per day be-
fore the season is over.
South Ferris FIeld.
The South Ferris field. or better
known as the General Petroleum camp,
is located in sections Q and 16, town.
ship rs N, range Sc W. This area is
all covered, and the formations and
structures concealed by wind blown
sands. The sand dunes are from rs to
$50 feet in thickness. The outcrops
ofthe Mesaverde sandstones are notice
able to the south. east and northeast
of h field. dipping at angles ranging
from - to 20 degrees.
The principal oil producing horizon
in this area is a sandy shale zone near
the base of the Niobrara formation.
Although there is evidence OF some
doming here. it is probable that the
oil is trapped in lenses and open places
in the formation rather than being
held by a closure in the structure. The
structure is that OF a plunging anti
cline striking about north rs degrees
west. in which direction It would inter.
sect the Mahoney dome axis to the
northwest.
1t is significant that commercial oil
has been found only In the upper for
nation n that a well drilled in sec
ton II TO a depth OF $500 feet en-.
countered only showings OF oil in the
Frontier and LAWYER Benton formations
and not much more. than a showing of
oil in the NiobrarR. A number OF
wells drilled to the north and west OF
his small area n higher up on the
I general structure have not proved
successful. It is probable that a very
pronounced fault separates the North
n South Ferris domes. but It is not
believed that this has any bearing on
the accumulation OF oil in eithcr struc
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