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122

‘bitumen. The well below Peace River Crossing was drilled to a depth of over
1,100 feet, and at 857 feet a small quantity of heavy black oil was struck. This
was cased off and the hole was continued to a depth of over 1,100 feet when a
very strong flow of gas was struck. An analysis of a sample of the oil is given
in the Summary Report of the Geological Survey, Canada, for 1916.

F. H. McLearn in his report for 1917 states:

“The discovery of oil this summer in the No. 2 well of the Peace River Oil
Company, about 15 miles below Peace River, lends particular interest to this
part of the district. The well is situated on the high strata where the south
dip flattens out northward. The oil occurs at two horizons, beds of sandstone
in both cases, near the base of the Loon river and not far above the limestone
contact. The upper sandstone is met with from 842 to 948 feet in the drill-hole.
Above 852 feet this bed yielded gas; from 852 to 905 feet it contained a highly
viscous oil; from 905 to 910 feet it carried salt water, and from 910 to 948 feet
was firmly cemented and barren of oil, gas, or water. Below this is a 14-foot
shale bed followed below from 962 to 1,032 feet by the second oil sand. This is
impregnated with an oil of somewhat better quality. This horizon would
produce a few barrels per day. An analysis by the Mines Branch (Edgar
Stansfield, Chief Engineering chemist) gave:

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(a) .Speeitie rravity at 6008. 2282 ‘981
(b) Distillation test.
a EPOLO We DOC 2h Sr ae 2°0 % by volume naphtha.
ae sf OOO Meee ate foes es NE ed _ 4°87
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«95090002222 sea} 668 % Muminating oite,
sf DOOD ois anes rs Ra 532
Residue and: AOBS sts. Se ee es ari 2'6°5 % lubricating oil.

“Oil of similar gravity was found at the corresponding horizons in the No. 1
well 14 miles downstream. The two sandstones are of less thickness here and
the shale between thicker. The thinning of these oil sands northward no doubt
limits the possibilities of exploration in that direction, since with their
disappearance there would be no reservoir to contain oil. As far as structure
alone is effective, it should be noted that it is of a gentle nature north of the

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k wells, with very low dips. The conditions obtaining at the wells, therefore,
F ; might be expected to prevail over a considerable area from the wells north,
i limited in that direction more particularly by the wedging out of the sandstones.
ie Were the strata thrown into undulations of a more pronounced nature, more
a circumscribed areas favourable to boring could be pointed out. In accordance
4 with the recently stated theory of David White, it is not improbable that the»

heavy gravity of the oil is related to this gentle structure.

“To the west past Dunvegan and St. John, no favourable structures for
boring were located. At Hudson Hope there is a broad low anticline. The
anticline at the Gates is broken by a fault. About 600 feet below river level
the upper shales, sandstones, ete., of the Bull Head Mountain sandstone would
be met with. Below this the lower sandstones of that formation are too massive
to serve as a suitable reservoir. The Triassic shales and sandstones must be
over 3,000 feet below river level at Hudson Hope.

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