The Morning Tulsa daily world. [volume] (Tulsa, Okla.) 1919-1927, 1922-12-31

pany includes the upper 1870 feet
OF the closure and also nearly two
hundred feet more OF closure on the
important east and south sides.
The drainage area tributary 20
the Hogback dome comprises the
35 square miles within the closure
and the uninterrupted area OF hun-
dreds OF square miles TO the east
and southeast into the great struc-
tutBl San Juan basin.
The stratlgraphy especially con-
cerned Is cretaceous. At the crest
the surface IL at the horizon OF the
so-called Tooito sandstone and the
Mancos shale, approximately eight
hundred feet above the so-calied
Dakota limestone, which overlies
the Jurrasic McElmo formation. The
Tocito sandstone has much Of the
characteristics OF the frontier TO the
north and in the intervals to the
Dakota or Cloyerly formation, the
so-called Mancos reveals Benton
characteristics and the recognition
OF Greenhurn, Graneros and Mowry
horizons, and ls considered favor
able for the production OF oil.
The Dakota maintains persistency
and was found nowhere less than
80 feet in thickness. Minor nom
persistency OF strata Is quite the rule
In this area. or course. the horizon
OF the discovery in the test well on
the Hugback dome IS not known,
but II seems likely that IL may be
within the Dakota or a sandy hori-
in the Mancos very near the Dakota.
When the reservoir horizon IS known
the theory as to the source and
method OF accumulation in the trap
may be determined. Whether as
sisted by faulting or purely migra-
| tion from an adjoining stratum is
yet to be determined.
From other viewpoints many in
! teresting facts can be cleaned ON
/ the san Juan basin area. SO far
| all of the commercial production
| from this basin comes from stray
| sand in the Mancos shale and Is very
| probably migratory oil that has been
| considerably refined by natural
process, Underlying this stratum.
! however, is the Dakota, which
| should prove TO be saturated with
! oil and gas where favorable struc-
! ture Is found. This is the formation
| from where the operators are look
! ing for an enormous production on
| the Navajo reservation. There is
also a probability of the shales and
| sands in the st. Elmo series prov
/ ing TO be productive and then there
/ is a possibility OF the middle Penn
/ sylvanian proving worthy.
There is a similarity between the
structures OF Wyoming and those
! OF the san Juan basin and n num-
! Der of closed structures that have
| q probable production area OF 2,500
acres or better II is still too early
to make any predictions, but taking
everything into consideration It
looks as IL the largest production
| will come from The crest of the
basin, instead OF the edge where
the present production is developed
Basin Is Practically Isolated
At the present time the greatest
need in the basin IL good roads
The roads are almost impassabl
due 70 the fact that the highways
across the Navajo reservation have
not been kept up and the Navajo
trail cannot be beat for Its deplor-
able condition, A few roads have
been built by some Of the oil com
panies that have been operating ir
the basin. but they have been only
to their own leases. The absence
of passable wagon roads will holC
up development for time and Il
is going TO take large outlay OF
cash and will keep good many
Of the smaller companies away fol
the present.
While Pennington is but iS miles
west a rich agriculture district that Il
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