, 1924-05-15
OIL and GAS DEVELOP
MENT in MEDICINE bow

Continued from Page ~
Four other wells were abandoned
for different causes. One drilled to
a depth of 1900 It. and found some
gas at 1900 It. The crude oil stu
alton in 1923 did not encourage
further testing of a field where the
oil is at such a depth as this latest
test indicates. 1t was believed that
the Muddy sand was within a short
distance, probably 200 feet from the
bottom OF the last well. 1t Is I'M
fortunate that this well could not
have been deepened to the Dakota
and Lakota formations. A new test
will undoubtedly be drilled when
market conditions make it advisable.
Rock River Anticline
This is a long and narrow dome,
the major axis bearing nearly north
and south. the productive area hav-
ing a length of about 81 miles, and
a width of probably not over a mile.
The limits of the field have been
fairly well outlined by drilling, in
the northeastern part of Township
1878 and southeastern part of Town
ship 2O-7S. an area of probably 100
acres. Their are about so producing
wells in the field, the production in
February 1924 being approximately
$500 bbls. per day. and for the year
1928 was approximately 1,5O0, 900
bbls. Production comes from three
sands, first and, second Muddy, depths
2570 to $500 IT., and 267O and 2695
f""t. md the Dakota 2725 to PITS IT.
the Dakotas being the big IA 1t
has been estimated that the recover
able production would approximate
10000 bbls per acre, or 10000, 900
bbls. for the field. The Ohio Oil Co.
holds all the producing acreage.
The Prairie Dog Oil & Gas Co. of
Norton, Kans., Is now drilling in
the sa of sec. IL T. 1913, and has
reached a depth of 2i0O TT. on a test
southeast.
McGm Anticline
This structure lies about IL miles
northeast OF the town of Rock River
being a narrow anticline trending
northeast and southwest, and having
a closure 3 or 4 miles in length. The
surface rocks here belong to the
Chugwater formation. The sands
which are oil bearing in other parts
of the Basin. the Muddy and Dakota.
are eroded away from the crest, the
Morrison and Sundance being also
removed. Consequently the oil, If
any, in this structure, would be
found in the Forelle. which CORE
spends to the Embar. or in the Cas-
per formation. which is believed to
represent the Amsden and Tensleep
of the central and northwestern
parts of Wyoming. They have not
been found to be oil bearing in any
part of the Laramie Basin as yet.
This anticline continues to the
southwest to the Rock River Oil
Field. and has been drilled near the
town OF Rock River without show
Ing production. but it is reported
that further tests are planned in
1924.
Gillespie Anticliuc
This structure Is parallel to the
McGill Anticline and lies 4 or 5 miles
north OF It. 1t plunges to the south
west and is open to the northeast,
rocks from the Cretaceous down to
the Pennsylvania being exposed on
its crest. no trap for oil being pres
ent. 1t was tested in 1910 or 1911
and found to be barren.
Footc Creek Anticlinc
The highest point structurally on
this anticllne Is in the southeastern
part of T. 30, X. rs, where there is
a small exposure of rocks Of the Nor
rison formation, the Cloverly, Ben
ton, and Niobrara encircling It. The
crest and the anticline runs south
easterly. almost along the Union "a
cifc railroad into the northeastern
part of T. 81, X. IT.
1t has been tested by W o wells
and found barren. all the sands be-
Ing water bearing. The Southwest