Montana oil and mining journal. [volume] (Great Falls, Mont.) 1931-1953, 1933-05-13
SUMMARY OF CUT BANK OIL FIELD
tContlnued from Page onel

level and the sand bottoms at
an average of 1900 feet. Oil
rises 1850 feet in all wells
Accordingly. the wells are with
ont sensational initial produc-
ton but none has shown appre-
cable decline in the first year
az production. Tarrant-Yunck
No. / in NWA 12-34-6W showed
slight increase over its initial
after six months of production.
No dry holes have been completed
over an area of twenty-one square
miles. Production varies with
porosity or concentration Of sand
but shooting with nitro glycerin
has proven beneficial where
sands are hard. The east edge
of the oil pool is defined by a
line drawn between the Montana
Power-PeOples gasser in Section
3O-34-5W and the Texaco-Small
gasser in 13-35-5W, but the
north, south and west limits are
not yet defined. The dip to the
west is 60 feet to the mile,
flattening out onto broad ter
race.
The terrace ends in the dis
turbed belt caused by the forces
attending the third uplifting OF
of the Sweetgrass Arch, during
which the Rocky Mountain anti
clinorium was torn from its
roots and pushed bodily east
ward, causing the development
of the Lewis overthrust fault
which halted 35 miles west OF
Cut Bank field with Pre-Cam-
brian rocks resting on top Of
Mesozoic sediments. Surficial
stresses were transmitted to the
sediments eastward beyond the
present mountain front and these
caused a closely folded and fault
ed area adjacent to the Cut Bank
field and offering possibility of
faulting from north to south,
although no faulting is revealed
by surface exposures in the field
MARKET-Cut Bank crude
goes into a nearby market with
a refining capacity of $4,000 bar
rels per day, including the fol-
lowing plants; Northwest Stel-
larine, Shelby, rs miles south
east, 1000 bbl; the Texas Co.
DeFlorez process, Sunburst, Is
miles northeast, $500 bbls.,
Northwest Stellarine cracking
plant, Coutts, 80 miles northeast
1000 bbls. Maple Leaf Refining
Co., Imperial subsidiary, Dubbs
cracker. Coutts 5000 Dbl Top
ping plants of 50O-bbl, capacity
at Kelvin, Kalispell and Havre
are buying this crude because IL
Is sweet" oil without sulphur
problems, a high octane product
and little fuel oil. In addition,
Imperial Oil has 5,0OO4bbl.
plants at Regina and Calgary
which look to Montana and
wyoming for most OF their crude.
Kevin-Sunburst has been supply
ing Imperial with from 1900
to 5000 bbls. daily for years
past but Kevin-Sunburs average
Is now 5000 bbls Pipelines to
Cut Bank have been surveyed by
Maple Leaf, to Coutts; Texaco,
to Sunburst and Santa Rita, to
Cut Bank, to loading racks and
proposed refinery site.
Only cable tools have been
used in Cut Bank thus far, com
pleting in from IS TO so days,
wells costing around $4,000
Rotary equipment is expected
this year to reduce drilling time
and costs. There is adequate
water for rotary use. Diesel
type motors are most satisfac-
tory for power and gas engines
for pumping.
The most important saving
with rotary will be IN casing
Cable tool wells require the fol-
lowing casing: 500 It. 133As
1000 II. 10; $500 r.. 81ks.
1850 IT. OF e-6/s. TIE 10 and
"a are pulled.