The Barre daily times. (Barre, Vt.) 1897-1959, 1918-11-18
PROMISING OIL TERRITORY
Is the Eldorado Oil Field in Butler Coun-
ty, Kansas.

The Eldorado oil field, in Butler coun-
ty, Kans., has to its credit for 1917 q
larger production than any other field in
the mid-continent district and promises
to be even more productive in 1918. The
discovery Of oil at Eldorado was due en-
tirely to the study Of the geology Of the
region; and the leading company in this
field, as a result of the findings of its
biologists, acquired control of about two
thirds Of the territory that has since
proved to be productive. The region
about Eldorado was examined in l9lT
and 1918 by the United States geological
survey, department Of the interior, in
co operation with the state geological
survey of Kansas. This examination,
which was in charge of A. f. Faith OF the
federal survey, revealed the presence of
some promising territory that Is still I'M
tested
A complete report on the work done
cannot be published for several months,
and as the need Of greater oil production
during the. present national crisis is urg-
ent some of the more essential results
obtained are now made public jointly by
the director Of the United States geologi-
cal survey and the state geologist Of
Kansas The conclusions presented,
which must be regarded as preliminary
only, are based primarily on the relation
between the oil production and the struc-
ture of the exposed rocks,
Position Of the Oil Pools.
The distribution Of the oil in the FL
4 =. l. ~ -,
the rock strata that is, by arches, or
anticlines, and domes. One principal up
fold, on which there are numerous small
domes and minor arches with intervening
saddles, extends from the southwest cor
ner of T. 20 s., f., to the southwestern
part Of r. "a s., r. 6 T., The producing
areas on this main anticline are in places
continuous from one dome or minor anti
cline TO another: but in the northern part
of the field the saddles between these
small domes and minor antielines are
large enough to separate the oil into To-
cal pools. Two pools thus separated lie
in the Wilson dome, which is principally
IN secs. 8 and o, II. 25 81, r, 8 III, and the
Robinson dome. which Is in sec. 3 Of the
same township. The initial daily pro-
duction of some Of the wells on these
domes was more than 1000 barrels.
In these domes the oil in the main pro-
ducing sand, the Stapleton, is not sym
metrically distributed Below the i'm.
mediate crests it Ii found principally on
the east and southeast slopes. On the
Wilson dome the producing well that
lies farthest to the southeast-the Prai-
RE Oil & Gas Co.'S Wilson farm well No.
2, in the southwest corner Of the Sc. u
Sc. "a sec. g--is structurally about 40
feet lower on the dome than any produc
ing well on the west or northwest side.
On the Robinson dome, whose crest is
near the center of sec. 3, the oil is OBJ
tanned for only a short distance west of
the crest, but it extends eastward from
the crest for quarters of a mile.
The same greater localization of oil on
the east side, though it is not so well
marked, Is found farther south, in the
main part of the field.
A Significant Feature Of Oil Accumula-
ton.
The fact that the oil extends well down
the east sides of these domes and not far
down the west sides is the important
fact TO be noted concerning the occur
renee of the oil in the Eldorado field and
this fact has not received sufficient con-
sideration in the tests of the still UNI
productive minor anticline called the
Chelsea anticline. The axis of this anti
cline trends southeastward between the
center Of sec 80, I, "a S., r. e., and the
east quarter corner of sec. 8, I, % s., r.
6 T.. The reversal Of dip or CLOSURE Of
this anticline il at least 40 feet on the
southeast, which is about twice as much
as that in the Robinson dome, to the
west. The rocks northeast of the Chelsea
anticline dip to northwestward-t trend
ing saddle that passes close to the north
east corner of sec. SO, I. "a s., r. D.,
and is 70 feet or more below the anticline
crest. The rocks south Of the anticline
dip ITO feet or more TO deep depression
in the main syncline near the southwest
corner of sec. 10, I. 25 s., r. 5 Il. The
dip of the rocks northwest of the anti
cline is regular, and shallow fiat saddle
lies west of it, between it and the Robin
son dome.
Chelsea Anticline Deserves Further Tests.
There is no apparent reason why the
Chelsea anticline should not be as pro-
ductive as the small Robinson dome.
Nevertheless two dry holes have been
drilled on tone on its west slope, about
20 to % feet below the crest, in the
southwest corner of the NV. n NV. u
sec. /, r. rs s., r. f., and the other on
it's north slope, about three.eighths Of a
mile from the axis and Is or 20 feet be-
low the crest, about 1000 feet northwest
of the southeast corner of sec. SO, 7. "a
IS, A. 5 Il. The failure of these two
tests, especially Of the one in sec 80,
was probably due entirely to the tenden-
cy Of the oil to accumulate on the east
and southeast slopes of such folds rather
than on their north and west slopes,