MAGER'S CAMP HOLE
SUN OIL COMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION GREEK AND PARACHUTE. CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE HEAD OF SLEEPY GULCH
(SW NW NW, SECTION 20, TOWNSHIP 5 SOUTH, RANGE 97 WEST OF THE 6TH P.M.)

GARFIELD COUNTY, COLORADO

aatone ren Tox eaLiona pen Tow
19 #9 30 40 40 40 79 00 1g £0 20 40.00 40 70 00
sunmace creer
200
400 <0
200 :
a0 200
20 z
a0 3 «
a0 :
400 ¥ 0
. eto 3
. =
<3 “ pe
: * 10 :
< 300 « 0
2 2 0
aa
70] EARRERY 0
> 708
id = i00
< 300 < 10
: Si
2 a0] = 2
« <n
3 2 «
a0] S 20
> 380 2 40
° >
<2 3 00
130 2
= Me : a0
“ * 129] z
* 00 zr
[| 0 .
Seo
100 :
m0 .
20]
#70 100
«|
no cure
10
TOTAL LENGTH OF SECTION - 545 FEET
260 FT. OF PLUS 15 GALLON SHALE . 27 FT. OF PLUS 30 GALLON SHALE
SELECTED SECTIONS
tavern [_rnow [vo [eatuone ren rom She =
7on|+e t|-s2 tt] 28.69 | 132,645,000 | 90,609,000
+ ge ft. 25.18 205,213,000 | 123,030,000
108 ft. 15.66 |1,011,791,000 | 377,254,000

CORE SAMPLES DRILLED IN 1948

Figure 27.



66-5-G WELL
GENERAL PETROLEUM CORPORATION
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION GREEK, PARACHUTE CREEK AND
GARDEN GULCH MEMBERS OF THE GREEN RIVER FORMATION ON THE UPPER WEST
FLANK OF THE PICEANCE CREEK STRUCTURE, (SE.NW.SE.,SECTION 5, TOWNSHIP 2
SOUTH, RANGE 96 WEST OF THE 6th PM.) AS INDICATED BY THE FISCHER METHOD AT
THE LARAMIE STATION OF THE BUREAU OF MINES.
RIO BLANCO COUNTY, COLORADO

30 40
190)
00)
wo
1200]
1200
00
200]
180
80
1200]
« . . 1300
. a t0] bl . «
. : 700 | .
¥ n0) Pa «
« « « ©
< < « < :
2 2 co 2 2 2
100
1109]
® ® .
: ® 5 000
: :
ry e ° 2 800 °
2 1080] = = = =
< < < < <
2 2 2 a Pare)
400
009]
“ . . . .
> > ° ° © 1000
° © seo + 4 2
. . . © 200 .
< s00 < . . .
1080
. + 800) * . .
° “ 900. .
00 “ . .
1000
a0]
1000
oso
1000 ie
200}
1080
00
10
90]
00
TOTAL LENGTH OF SECTION- 2890 FEET
1476 FEET OF PLUS 18 GALLON SHALE... -++ +90 FEET OF PLUS SO GALLON SHALE
SELECTED SECTIONS
uenere | rrom | vo |eations ran Tom
son] on] -s0n. 26.37
root.| sion] -s0r roan
zoron. | +3908. |-168081. 19.05

ROTARY CUTTINGS ORILLED IN 1947

Figure 10.







SURFACE SECTIONS
SAMPLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE GREEK MEMBER OF THE GREEN
RIVER FORMATION TAKEN FROM SURFACE EXPOSURES ON COTTONWOOD POINT AND
ALLEN POINT, AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION

OF THE BUREAU OF MINES.
GARFIELD COUNTY, COLORADO

COTTONWOOD POINT ALLEN POINT
Nw. /4 SE. /4 SEC. 22, T.6S Nw.l4 NW.’ SEG. 30, T.6S.
RoW. OF THE 6th’ P.M. ROSWOFTHEGIN EM,
0 EWS BS oo 9 ESSE ES BS ao
i H
H :
i :
be :
semnoeany “ESRER’ 0
MARKER © ae
: :
: :
we
:
: :
a :
0
coriomnoes PONT] aE FT oT SE3 FT
Sree eee wre re were 358

SELECTED SECTIONS

ou [oaLuows pERTON|TONS PER e0.MILE

COTTONWOOD POINT
ALLEN POINT
ALLEN POINT

p20 Fr.
"3sFr.
[+ 10.5,

139,448,000] 93,670,000
635,000 0

138,886,000] _ 83,002,000

CHANNEL SAMPLES TAKEN IN 1944

Figure 37.



SECTION E-E
HORIZONTAL SCALE VERTICAL SCALE >
ime yes omnes sooreer 0 3
a 2
&
2 3
g
2 026
cr
oe, 3
£73 & z o
Fd s/\ we 2 * . xe
Fe s
2 og /\8ps © . Ff a8
S 3 Pt z = o « $
3 x“ ry 2 S 4 rd
8 3 ¢$ = : $ Co «
Q w 3
“Fyne 5 s 8 FS 3G
» ERs s 3 5 2 3
Eeei\E 3 nr By 2
eo6 fk a 2 Ld 2 =
_s Fs e_
S—£-8 § é
z a
s ° “ =
5 & é
a e “
. 3
8 8
320) 5 2
WA
97 Bs
Y
LEGEND Z “a EL. 7000 FT.
ZONE OF 25 GALLON SHALE ~ Pea
(146) BARRELS OF OIL PER SQUARE MILE IN MILLIONS ~ 7 _-
AVERAGE WEIGHTED OIL CONTENT
480) ZONE OF 15 GALLON SHALE LENoTH|
(400) BARRELS OF OIL PER SQUARE MILE IN MILLIONS prow | to | aw
mIves Tee cat suale,
yu fmocet eee | 20.3
synt [roves [31.2 | 126.7,
A= Manooany wanxer
——— PROBABLE LOWER LIMIT OF 18 GALLON SHALE cL, 6000 Fr.
TRUE SECTION
WORIZONTAL SCALE
romper
— ao oe“

Figure 6.






Assay Logs

The oil yield of the samples in each sectio has been plotted in the form
of assay logs. Individual assay logs differ in scale as to the vertical
distance and oil yield. In canparing various sections this must be taken into
consideratim, Apparent gaps in assay logs, especially when the oil yield
is fair or good both above and below the gap generally, are due to lost
samples.

The total length of section represents the total length sampled or studied
and, with core samples or rotary cuttings, does not necessarily conform with
the depth of the hole. The number of feet of plus 15-gallon and plus 30-gallon
shale has been shown, so that these sections can be compared with sections
taken by Dean E, Winchester .4/ Plus 30-gallon shale means all shele that
sempled over 30 gallons of oil a ton. For example, in a 5-foot section if
each foot assays in order 50.8, 29.3, 30.2, 23.1, and 35.9 gallons per ton,
there would be only 3 feet of plus 30-gallon shale, even though the average
of all 5 feet is 33.8 gallons per tm of shale.

The table at the bottom of each assay log showing selected sections, in
general shows a high-grade section averaging 28 to 35 gallons per ton near the
Mahogany marker, an average 25-gallon-a-ton sectio known as the Mahogany
ledge, an average 15-gallon-a-ton section, and an average 10-gallon-a-ton
sectim. Twenty-five-gallon-a-ton shale is at present considered to be
potential economic grade. However, future methods of mining, retorting, or
extraction in place might make a lower-grade oil shale of economic importance,

All selected sections are weighted, both for sample widths and specific.
gravity. The Laramie station of the Buresu of Mines has made a specific-
vity curve for the oil shales of the Green River formation in Colorado
(see fig. 47) on which the specific gravity of the oil shale varies in an
inverse curve with the oil yield. An example of weighting samples follows:

Two continguous, flat, 1-foot beds of oil shale have oil cmtents of 1
and 80 gallons a ton, respectively. An arithmetical average for the two beds

would be 2A = 40.5 gallms. ‘he specific gravity (from chart) of

1-gellon shale is 2.74 and of 80-gallon shale is 1,60. The average specific
gravity is 1.60 + 2.74 = 2.17. By the specific-gravity ourve, this is the
2

specific gravity for oil shale containing 29.3 gallons of oil per ton-- a
difference of 11.2 gallons of oil a tm from the arithmetical average.
Avrithmetical averages are always higher than weighted averages. As same of
the sectias often include several hundred individual samples of evrious
lengths, a special table has been prepared showing the specific gravity, weight
per cubic foot, and the gallons per cubic foot by one~gallon-a-ton intervals
fron 1 to 80. This method has been found to be more accurate and faster.

In making calculatims such as these, the number of gallons of cil in a square-
foot column equal to the height of tho section is calculated and then divided
by the height of the colum, in feet, to obtain the average oil yield per

cubic foot.

47 Winchester, D. E., O11 Shale of the Rocky Mountain Region: - U. 8. Geol.
Surv. Bull. 729, 1923, 204 pp.
4025 -5-



‘unrace a1. 90003

7
wre

asove

HOLE J

DRILLED BY THE BUREAU OF MINES

ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION NEAR THE HEAD OF THE EAST FORK OF PARACHUTE CREEK
(SW, NW, NW, SECTION 24, TOWNSHIP 5 SOUTH, RANGE 94 WEST OF THE 6th P.M.) AS
INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

LON PER TON

wanwen

aeove Mano

er

TOTAL LEN
07 FT.OF PLUS 15 GALLON SHALE

rom
‘co

IGTH OF SECTION...628 FEET

fT. OF PLUS 3O GALLON SHALE

SELECTED SECTIONS

cry

jaLLOws PER Yon

‘Bannece
PER eOUARE MILE

ar er
- 34

.|—80 FT.
r.|—80 FT.
r|[—es Ft.

toot
2.78

000

CORE SAMPLES OMILLED IN

1940

Figure 17.





unrace

°
.

HOLE I
ORILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION ON THE EAST SIDE OF YELLOW JACKET
CREEK (NW. SE.NW., SECTION 20, TOWNSHIP 5 SOUTH, RANGE 94 WEST OF THE 6th P.M)
AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

@ARFIELD COUNTY, COLORADO

eaLLons ren Ton eaLLome Pen Ton eaLLone pan Ton
© 10 80 30 4 7000 120 40 bo €0 To 80, ©. 80 30 40 80 60 70 00

00 40 —
a -
ms .
- .
oo |
- -
See pie
‘ "
: :
= ne
: me
: ye
Fo F we0
Piso 270
. .
a Sie
: i

0 a0

0
ro 00
“ 00
Py 270
20 200

a0

TOTAL LENGTH OF SECTION -859 FEET

‘232 FT. OF PLUS IS GALLON SHALE. .37 FT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS

CORE SAMPLES ORILLED IN 1949

Figure 15.



SYNDICATE No.1
STANDARD OIL COMPANY
OF CALIFORNIA
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE 8. FORK OF CLEAR CREEK (SE. SW. NW., SECTION 11, TSS.
R9O9W. OF THE 6th PM)

GARFIELD COUNTY, COLORADO

GaLLone Pen TON LONE PER T LOWS PER Tom
910 80 30 40 8000 rtp. 20 40 40 60 40 2.19 20 30 40 60 6
200
z
330
100
2
ato i
. 7)
“ 310 :
. = wo .
3 300 2
190
> > we
= 800 : “axnnen
‘ : arse
: Je
2 40 £
. < 0
a a :
t70 :
3
. = 10
3 te : :
: +0 3
3
ne |
°
20
rs
tt0
70
sorrow 1.761
10
“
TOTAL LENGTH OF SECTION - 400 FEET
207 FT. OF PLUS 18 GALLON SHALE ...............23 FT. OF PLUS 30 GALLON SHALE
SELECTED SECTIONS
= Taras oF orc
Caner re [eatsone ven tow Sane Soe
S0_Fr. naa
ered 28 210%
388 FE adad 18.17 581,000

‘2 FEET NOT ASSAYED

CORE SAMPLES ORILLED IN 1948

Figure 31.



Each selected section shows the thickness, the location as regards the
entire sectim, the weighted average oil yield per ton of shale, the weight
of the section in tons per square mile of 640 acres, and the oil yeild per
square mile in barrels of 42 gallons, as indicated by the selected section,

The type of samples and the data taken are shown at the bottom of the
assay loge

VERTICAL PROFILE SECTIONS

Six vertical sectims (figs. 2, 5, 4, 5, 6, and 7) have been made of the
Piceance Creek basin. The locations of these sections are shown on figure 1.
They are not straight-line sectims, but run fram hole to hole. All sectims
have an exaggerated vertical scale, so that the 15-gallon and 25-gollon-a-ton
shale can be show. A true section is shown below each exaggerated section.
The two small folds shown in A-A! end B-B' have not been surveyed, and the
faults parallel to the folding near the Picenace Creek wells have not been
mapped. Because contour maps were not available for the area north of
township 4 south, the surface elevations in the north portion of the map had
to be drawn in from a few known bench marks and may be in error, The west
portion of section E-E' runs northwesterly, and the last thrée holes are at
a lower elevation than if they were on the east-west line of the rest of
the section,

Each section contains a table showing the average ofl yield for 15- and
25-gallon shale in millions of barrels per square mile end the length of
the section taken. The average oil yield has been weighted for the varying
distances between sampled sections, .

Beginning at the south end of the basin, the three east-west sections
show the following average oil cmtent:

1 | Length, Barrels of oil per square mile
Section Fran- | To- | miles 25-gallon shale j 15-gallon shale
F-F! SF. fl | HoleA | 21.4 | 12h,000,000 ~~ T 371,000,000
E-E! Syn. #2 | HoleL | 29.6 | 129,000,000 | 391,000,000
D-D! “S.C, hole | Hole F | 14.3 | 163,000,000 | 681,000,000

In section E-E', 6 of the 10 diamand-drill holes did not penetrate
through the middle oil-shale zane, If this zone had been sampled, the 15-
gallon shale in section E-Et would cmtain about 430 million barrels of oil
per square mile. The distance between adjacent east-west sections is roughly
3-1/2 miles, and indications are that the oil content of the shale is
increasing to the north or toward the center of the basin.

A tabulation of the two long north-south sections is given below:

T Length, [Barrels of ofl per square mile

Section Exqu- To= . | miles gallon shale |

A-At Hole C \ 66-5-4 | 28.7 162,000 ,000 788,000,000

A-A! Hole ¢ E.G. "1" 42,00 132,000,000 840 ,000 ,000

B-B! Ak. No. 3 U.8.G.5, 35-4 118,000 ,000 1,035,000 ,000
ne

4025 -6-


COLUMBIA SURFACE SAMPLING
COLUMBIA OIL SHALE COMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE CLIFF EXPOSURES OF THE EAST MIDDLE FORK OF
PARACHUTE GREEK (SECTIONS [6 AND [€, TOWNSHIP 6 SOUTH, RANGE 95 WEST
OF THE 6th P.M. ASSAYED BY F.A. GOODALE.

@ARFIELD COUNTY, COLORADO

cations ran v08 eauiows ran tow autons van ron
o'o tess woes onto to ao a0ao Aree
we a
eunrace 8. 77884, we 5
i
ae 220 :
H
400 ano z
i
300 a0 3
100 :
. :
ro S00
:
m0 100
5 :
< 300 170
: Py
H
: :
«340 <0 |
2 : .
me i :
° e 2
: :
* w00 tHe :
une
: :
id .
4
o0, We :
t00
oe .
200 o sorrow #L.Tiee!
a0 ‘
TOTAL LENGTH OF SECTION
261 FT, OF PLUS 18 GALLON SHALE.
secectes sections
7
Teer
miso tt
Hoos

Figure 20.



NEWTON POINT SURFACE SAMPLING
FEDERAL OIL SHALE COMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN

RIVER FORMATION ON THE CLIFF EXPOSURES NORTH OF THE TRAIL ON NEWTON

POINT (SE. SW. SW., SECTION 3, TOWNSHIP 6 SOUTH, RANGE 96 WEST OF THE 6th RM.)
GARFIELD COUNTY, COLORADO

eorrow a. 7080

TOTAL LENGTH OF BECTION- loz FEET
‘TFT. OF PLUS 18 GALLON SHALE.............,.52 FT. OF PLUS SO GALLON SHALE

SELECTED SECTIONS

tener | prow | ro | easons ram vow ie ran

scuuna “out
eeior teeivestboo
B70. 209/030,000

CHANNEL SAMPLES.

Figure 41.





GREEN RIVER OIL-SHALE RESERVES
OF NORTHWESTERN COLORADO

by
Carl Belser/

Introduction..
Acknowledgments..
Geology. .coccccccoee
Sampling and assaying.
General.....ssesee Seaver ever eeercees
Relative value of drill cores vs. drill cuttings and
Surface Sampling.....cwsccccccccvcecccccssccevseves

Assay logS..csecceee
Vertical profile sections.......
Oil yield contour mapS....e.s.eee
Estimated reserves......
Partly blocked shale...
Inferred or probable shale.
CONCLUSIONS ..eeeeeeseseerseceesseeeseeesensseesveessesees

TABLES

High-grade section of Mahogany ledge.....sceccssecees
25-gallon section, including Mahogany ledge.
15-gallon shale diamond-drill holes.......
All shale over 10 gallonsS......ccesessesscccccsccceess

FWNMH

bas]
©
WO OBAAN AY & wureenf

a/ Mining engineer, Bureau of Mines.

Report of Investigations 4769




AGOVE MAHOGANY MARKER

reer

HOLE B
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!

OWL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE HEAD OF THE SOUTH PRONG

OF THE EAST

FORK OF PARACHUTE CREEK (SE. NW. V4 , SEC. 12, T.6S.,R.96W. OF

THE 6TH RM) AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION
OF THE BUREAU OF MINES.

GARFIELD GOUNTY, COLORADO

SALLONS PER TON eauLowe PER Tom eALLoWe PER TOW

© 10 £030 40 «1

eo 000 2 10 80 3040 oe eo 70.00 © 10 20 30 40 60 €0 70 00

wanoeany

avove

reer

mL eosos!

TOTAL LENGTH OF SECTION - 656 FEET

17@ FT. OF PLUS 15 GALLON SHALE.............. 37 FT. OF PLUS 30 GALLON SHALE
SELECTED SEOTIONS
tener | raom | to [eacons ran vom
72 t.[+ 17 #.]- 65 137,664,000
e2 tt.|+ 17 tt.|- 65 tt. 188,628,000
423 11. | +308 tt. 883,745,000
649 tt. | razor. 1,397,164 000

CORE SAMPLES DRILLED IN 1946

Figure 34.





Bureau of Mines
Report of Investigations 4769

|| GREEN RIVER OIL-SHALE RESERVES
OF NORTHWESTERN COLORADO

By CARL BELSER

United States Department of the Interior — February 1951

| metadc38558







Green River oil shale seems to offer a resistance to electrical current
in direct relatioship: to oil content. A compaison, by electric logs, of the
resistivity curves of General Petroleum's holes 64-15-G and 66-5-G indicates
that the unsampled lower 900 feet of 84-15-G contains as much oil as the
equivalent section in 66-5-G, If hole 84-15-G were figured om a basis of
1,900,000,000 barrels of-oil per square mile for the 15-galion shale, tho
average oil content of 15-gallam shale for section A-A' would be 1,098,000
barrels of oil per square mile for a distance of 28.7 miles and 1,061,000,000
barrels for the 40,2-mile distance.

If Bradley's theory is correct that the organic content of the shale
is greatest near the centers of the old lake basins, decreasing in all
directions toward the shore facies (this has. been substantiated by assayed
sections), then any section teken through the center basin should give an
approximate average oil yield for the. shale. Sections A-A' and B-B' do not
pass through the cater of the basin but are fairly close to it in the region
of the General Petroleum wells.

OIL YIELD CONTOUR MAPS

Contour maps showing the extent of the 25-gallon shale (Mahogany ledge
section, fig. 48) end the 15~gallon shale (500-foot measure, fig. 49) have
been prepared.

The cantour lines on these maps represent millions of barrels of oil
yield per square mile ratner then elevations. The thickness of continuous
bed which will yield either 25 or 15 gallons per ta is the basis for
calculating the number of barrels per square mile between contour lines.

For example, on the 25-gallon-per-ton contour map, the dotted contour line
encloses an area having a minimum continuous thickness of 30 feet ef 25-gallom-~
per-ton shale and a minimum yield of 29 million barrels per square mile.

This thickness increases to aboit 47 feet at the 50-million contour line

and 140 feet at the 150-million contour. Similarly on the 15-gallon-per-tm
contour maps, the dotted contour line ecloses an area having a minimum
continuous thickness of 200 feet of 15-gallon-per-ton shale end a minimum
yield of 150 millim barrels per square mile. . The thickness of the 15-gallon
shale increases to 1,064 feet at the 800-million-berrel contour.

The dotted contour line on cech map encloses an areu slightly larger than
the 1,000 square-mile area considered as a basis for estimates in this report.
In the southern portion of the basin, the location of the contours is fairly
well governed by assay results fran core holes, however, in the Cathedral
Bluffs and northern portions of the basin, their location has been inferred
fran very sketchy channel sampling. It is possible that accurate sampling
in these areas would show the contours extending outward much farther toward
the cdge of the basin than is show cm the maps.

ESTIMATED RESERVES

The area of the Piceance Creek basin between the Colorado and White Rivers
contains approximately 1,650 square miles of Green River formation, of which
about 1,000 square miles is thought to catain oil shale of potential

4025 -7-




AKOLT No.!
STANDARD OIL COMPANY
OF CALIFORNIA
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE EAST SIDE OF CLEAR CREEK (NE. NW. SW.,SECTION 14,
TOS, R98W.OF THE 6th PM)

GARFIELD COUNTY, COLORADO

eattowe on Tow n..om ran rom n..ome on Tow
‘olan ve 0 bo 80 aah oP a new rofl wre a0 op
evarsee 11.7048
700) a0) 0
one ato] 20
wwe a0 veo]
oe 00
we 200]
~ 00
“ tm
wwe seo]
« :
00 3 m0
2
we wo
wo > a0 «
* . .
ft < 10] «
Sue ° ne ”
: :
see v0 »
‘ 2
00] a00] *
“ = aso 0
. >
> ° tanonany
Juco $ are rrr |
° : aities
‘ue me °
oo + a0
: |
:
00 a0
we ase
ae . |
- 0
a 100
we 2°
sorrow 1.148
TOTAL LENGTH OF SECTION -660 FEET
FE OF PLUS 1B GALLON SHALE... 16 PT, OF PLUS 30 GALLON SHALE
ELeGTeD sections
Toms Fan | Sanna oF
tame [ cnoe [to [ussororen ron] sce, | Sanus Site
tea7 731,084 900 | 88,232,000
rf iPoreas p00 peta
13.83 1,060\808000 | 37 9'540,000
i2:3e Uatessaopoo | s¢r.7e0}000

AMPLES ORILLED IN 1948

Figure 42.











HOLE CG
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE HEAD OF THE SOUTH PRONG
OF THE EAST FORK OF PARAGHUTE GREEK ( SW./4 NW.lM4 SEC. 12, . a
THE 6TH PM.) AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION

OF THE BUREAU OF MINES.
GARFIELD COUNTY, COLORADO

GALLONS PER Tow GALLons PER TOW GALLONS PER TOW GaLLons pen TOW
10 20 30 40 80 40 70 0.10 20 30 40 40 60 70

10 £0 30 40 80 40 70 2 10 £0 30 40 80 00 70

8353

3

ERRSEESSESEEESEREREE
PERERESEEEES

ge838

no

FEET s£Low MAHOGANY

SESS ee eee ee
H

TOTAL LENGTH OF SECTION - 1677 FEET
212 FT. OF PLUS I5 GALLON SHALE.............. 3SFT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS
tewerm | rrow | To [@aLLows PER TOM
7a FT| +21 FT|- 53 FT
90FT. | +21 FT|- 69 FT.
475FT. | +388FT|- 87 FT.
SIFT. | + 3eQFT| -193 FT
7e7FT, | +368FT| -399FT

CORE SAMPLES DRILLED IN 1945-6

BARRELS OF 61
Pan souane MILE

95,417,000

5900
433,521,000

Figure 35.









LIGNUM VITA No.13
UNION OIL GOMPANY OF CALIFORNIA

OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION BETWEEN EAST MIDDLE FORK ANO EAST
FORK OF PARACHUTE CREEK (SE.SW. NE., SECTION 21, TOWNSHIP 5 SOUTH, RANGE 96 W.
OF THE 6th P.M.)

eunmace e1.7e83.1

a0

wanoeany

0

asove

@ARFIELD COUNTY, COLORADO

eauLoms penton faLLone PER TON
© 10.80 80 40 8000 70 00 10 80 30 40 80 80 70 60

2
m0 8
10 :
we .
ory ty
00
0
00
°°
ere arrose!
TOTAL LENGTH OF SECTION..647 FEET
205 FY. OF PLUS 18 GALLON SHALE............ ++ 47 FT. OF PLUS 30 GALLON SHALE

SELECTED secTiONS
(entions eae rom

iced
eouane mie

32.768 110,878,000
24.9 280,765,000
18.29 1127,681,000] 410,830,000

CORE SAMPLES ORULLED IN 1948

Figure 24.



LINDAUR POINT SURFACE SAMPLING

UNION OIL COMPANY OF CALIFORNIA
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE CLIFF EXPOSURES OF LINDAUR POINT (EAST 'g, SEG
19, TOWNSHIP 5 SOUTH, RANGE 95 WEST OF THE 6th PM.)
GARFIELD COUNTY, COLORADO

ALLome PER TOW ALLOWS PER TON CALLONS PER TON
© 1090 20 0 eco TOC © 10 9 30 40 80 €0 70 80 010 80 20 4080 00 O80
ror eu.vora!

wanken

wanoeany

asove

veer

TOTAL LENGTH OF SECTION..600 FEET
174 FT. OF PLUS 15 GALLON SHALE. +38 FT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS

ALLOWS PER Tow

Lanere

een.
ose
aaa t.
We7e.5t.
‘21.8 PERT WOT ASSAYED
CHANNEL SAMPLES TAKEN BY RODERICK BURNHAM

Figure 22.







FEET ABOVE MAHOGANY MARKER

HOLE D
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!

OL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK

MEMBERS OF THE GREEN RIVER FORMATION ON THE NORTH SIDE OF THE MIDOLE FORK
OF PARACHUTE OREEK (SW le SW14,SEC.II, TSS. R95W, 6thPM) AS INDICATED BY THE
FISCHER METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO
@aLLons.

FEET ABOVE MAHOGANY MARKER

FEET BELOW MAHOGANY MARKER

20

Manogany 0
eLr3er8 m0

280

270

BELOW MARKER

EL7108.9

TOTAL LENGTH OF SECTION- 701 FEET

‘316 FT. OF PLUS IS GALLON SHALE........... + +74 FT. OF PLUS SOGALLON

in TON
© 10 2030 4080 €0 7000

SHALE

SELECTED SECTIONS

Teno | prow To [oations ren tow] gone
‘e2FT | s25FT 30.87 | 178,060,000
tar, | s25e7. 27.11 | 268,382,000
ISS FT. | +47 FT, 26.00 | 300,641,000
Sort | +163FT, 19.25 | 796,942,000
TooFT. | +4uFT. 18.79 | 1463134000

CORE SAMPLES DRILLED IN 1946

Figure 19.



TABLE 2. - 25-gallo section, including Mahogany Ledge (all diamomd-drill holes)

Thickness, ] Oll, gal. Gal. equare|. Tons per [Barrels of oi] —
Hole feet per ton ft. colwm | square mile|per square mile
Aesocecncens 5.0 25014 145.575 | 164,735,000] 98, 60h, 000
82.0 25 043 144.721 | 158,625,000 96; 045,000
90.0 25419 157-615 |.174,352,000! 104,570,000
155.0 25400 269.775 — |300,641,000} 178,955,000
155.0 25425 271-813 —-|.300,167,000! 180,458,000
110.0 2547 194.337 |-212,740,000; 129,012,000
10.0 25.400 17.405 19,403,000 113519 ;000
130.0 25037 228.915 251,517,000 151,946,000
120.0 25422 210.314 | 230,973,000 138, 694,000
19.0 25.02 330079 |. 36,855,000] 21,955,000,
119.0 25,01 207 «167 230,805,000} 137,439,060
85.0 24.97 17.772 164,901,000} 93,038,000
126.5 25.00 220.539 | 245,971,000) 146,411,000
106.0 25.18 186.297 205,213,000} 123,030,000
S.Ce eeeveee| 131.0 25.02 228.115 | 254,028,000] 151,328,000
AKe leossoes 88.5 26.69 1572508 ={170,922,000; 104,547,000
AK. Qececeee| 90.0 25.048 159,155 4174, 0453.00] 105,587,000
AK Bevoveee 87.0 - 25047 153.696 |168,246,000; 102,029, 000
SoBe Levees) 8645 25476 154.352 166; 992,000 102 7422,,00
Sys leseseee, [50D 25.2h 128.898 | 146,220,000] 87,872, 900
Sys Qoecoecs 84.0 25.09 146.561 1627 838,000 91,216, 000
B.C. Leseeee| 129.0 25.07 22h .928 250,097,000} 149,284,000 .
TeBeMe 6oeee) 130.0 25.50 229.980 | 251,352,000] 152, * 607,000
LoVe Qeveeee| 111.0 25.34 195,362 | 214,851,000, 12976157000
LoVy L3eeeee! 137.0 2h 698 238.198 | 265,165,000! 158,067 ,000
Totelececes.| 2540.0 | » 4455 .066
Averagessese! 101.7 i 25022 1.753 196,989,000 118,287,000
All dlamond-drill holes except marginal holes G and J
Totaleseesce| 2513.0 7 4, 404582 | °
Averagescece! 109.3 25422 | 1.753 __ | 211,709,000} 127,126,000
General Petroleum wells
28-19-G 90.0 1 2h.95 156.240 “TI7#, 655,000; 103,672, 000
2h-12-G 70.0 2h.87 121.310 |136,047,000} 80,559,000
66-5-G 100.0 25611 174,600 |193,839,000| 115,888,000
84-15-G 140.0 25.39 2h6.820 | 270,894,000] 164,762,000
Total.ccace 7.00.0 698.970
Averagerees | 100.0 25-12 : L747 1193, 839,000) 115,934,000
All holes
Totaleceses | he. 7 5,154.030 |
AVOrageseee 102.4 {25.21 1.752 1196,431,000| 117,905,000

All holes except marginal holes G and J

Total..ss. | 2515.01 | bekO5.55 ~
Averegesses | 107.9 | 25.22 1.752 |209,004,000| 125,452,000

4025 -hle-



GREEN RIVER OIL-SHALE RESERVES
OF NORTHWESTERN COLORADO

By CARL BELSER

* « « «* « «* « « « Report of Investigations 4769

UNITED STATES DEPARTMENT OF THE INTERIOR
Oscar L. Chapman, Secretary
BUREAU OF MINES
James Boyd, Director

Work on manuscript completed May 1950. The Bureau of Mines will welcome reprinting
of this paper, provided the following footnote acknowledgment is made: “Reprinted from
Bureau of Mines Report of Investigations 4769.”

February 1951








2
i

3

ry
38

ry
3

&

oe

MODIFIED FISGHER ASSAY OIL YIELD, GALLONS/ TON
8

ny
8

SPECIFIC GRAVITY AND OIL YIELD OF GOLORAO OIL SHALES
© Core Samples (minus 8 mesh) from Test Hole "A U.S. Naval Reserve No.|, Garfield County.
® Specific Gravity by Le Chatelier Flask, Sample from Cottonwood Point.
& Sample from Cottonwood Point.
# Oil Yield Estimated.
x
Ne
x
x
q
°
°
Ie
ke Na
x Mm
°
i fx Ys
us 1.6 17 18 Lo 2. 2.4 25 26 27 2.8

2.1 2.2 2.3
SPECIFIC GRAVITY, 60/60° F.

Figure 47.







CONTOUR MAP OF 25-GALLON SHALE ( MAHOGANY LEDGE )
PIGEANCE CREEK BASIN
RIO BLANCO & GARFIELD COUNTIES, COLORADO
GONTOURS IN MILLIONS OF BARRELS PER SQUARE MILE
JULY SCALE 550003 1950

IQ MILES 9 10 20
LEGEND
SSY_BOUNDARY OF GREEN RIVER FORMATION @ Ol WELL CUTTINGS
NAVAL OIL SHALE RESERVES No.| AND No.2 + SURFACE CHANNEL SAMPLES
GEE] IGNEOUS ROCKS @ GORE SAMPLES

H ) (& 7 AREA ESTIMATED IN REPORT
7

H cx) 108] Tor 700" or Say
‘ IWS24) 3s 3 com
URS

aD) t 2
= Dot eee & man

REX He SAY

1
t

Se

Z,

Y

aS
LY,
WZ
>)

ice
3 IN ce} OO
N if 71 EN S <\ Ni 5 \ 7 \ a
aN ‘E WA SAN

; ; \ ae co a

A
PORE
i
g
g
re
OF FESTA.
BOM
Ba G ‘fq
Lyf ~
WAZ)
OY Yn
ts
yyy ts
Cy
LLY

LEE
ww
Aeage
G
z.
ZZ
eZ
?
4, ‘Ly
TTF
Y,
=
WG)
Ly
Y
Uy
Gy
Yyoge

ZL,

4
if
wan

Figure 48.




TABLE 4,

~ All shale over 10 gallons (811 diamond-drill holes)

Tthickness,| Oil, gal./ Gallas square fons per | Barrels of oil
Hole | feet per tm foot: column square mile {per square mile
Avesceees| 711.0 11.54 637 056 1,538, 246,000 | 422,505,000
Beovsvess| 649.0 11.66 586 6696 1,397,154,000 | 387,710,000
Cosceoeee, 78720 10.61 655.210 1 one, 107,000 | 433,521,000
Deevesese; 700.0 15.79 * 828.800 v °463,13!,000 550,069,000
Ev coveeee| 1,536.0 10.99 1, 316.136 3,340, 278,000 | &74,039,000
Frseecees| 726.0 11.13 G29 .164 1,577,081,000 | 417,926,000
Geesescee, 51500 10.11 408.971 1,127,849,000 | 271,489,000
Heceseeee| 819.0 13.61 * 851.193 1,743,710,000 | 565,045,000
Leceeveee| 850.0 11.46 756 28 1, 841,480,000 | 502,461,000
Teccccese| 607.0 10.01 477.6763 1,330,413,000 | 317,082,000
Keevceses| 57540 15.03 652.717 1,209,950,000 | 432,989,000
719 60 10.78 605.082 1 3566, 181,000 | 401,986,000
499.0 18.55 665.220 1 3019 > 262, 000 | 450,174,000
483.5 15.66 568.447 1,011,791,000 | 377,254,000
11,143.0 14.76 1,272.42h 2,4105757 ,000 847,209,000
Ake Leese} 660.0 12.36 628.962 1,419,540,000 | 417,750,000
Ake Qeeee! 770.0 11.33 766.628 1,669,972,000 | 450,495,000
Ake Beees| 634.0 12.49 609.618 1}362,194, 000 ; 405,091,000
BoF. lees} 460.5 15043 55h 439 965,675,000 354, 84,000
Sye lees) 398.0 14.85 4b6 hd 838,833,000 | 296,587,000
Sye Qeeee} 430.0 15.09 4.89 ..556 “904,487,000 | 324,969,000
BoC. Lees} 729-0 10.78 614.059 1 1587,954, 000 407,575,000
J.BM. 66/ 376.0 18.18 502.399 770,670,000 | 333,590,000
LoVe Geoe| 616.0 13.88 651.747 1, 308, 672,000 432,487,000
LoVe 1300]__ 537-0 15.29 618148 1,127,681,000 | 410,530,000
Totalee.g.| 929.8 | 16,771 -960 7
Average..'! 677.2 | 12.91 } 0.991 1,450,012,000 | 445,706,000
All diamand-drill holes except marginal holes G and J
Total... 5,807.8 15, 885.226 °
Average. 687.3 13.12 1.005 1,469,164,000_ 458,939,000
General Petroloum wells
2B-19=G. «| 2, 200.0 11.50. | ~-2,042.070 1,905, 344, 000 1, 350,150,000
24-12-Gee 2, 273-0 12.76 2,227 540 4, 863, 208, 600 |1,477, 489,000
66-5-G..| 2,070.0 19.05 2,877 2300 4,211,551, 000 i790, 339,000
G4-15-Gee 1310.0 15.75 1,548.420 | 2,745,680, 000 11 029,705,000
Botal. ++e|7, 7919.0 | 8, 685.530 i
Average. o! 1,979.8 14.46 1.097 14,185, 886,00012, 442 142, COO
All holes
Total. 024, 43.8 25,457 «290 °
Averages. 856.9 15.40 1.024 1,827,513,000 583,064,000
All holes except marginal holos G and J
Total...de3, 100.0 | 25 5570 .550
Average. 818.8 | 13.57 1.036 1,871,644,000] 604,719,000
4025 -13-

Interior, Bureau of Mines, Pittsburgh, Pa.




OIL YIELD OF SHALE PENETRATED BY DIAMOND-DRILL HOLES AND OIL WELLS

TABLE 1, --High-grade section of Mahogany Ledge (all diamond-drili holes)

Thickness, | ‘Oil gallos | Gal. square] Tons per [Barrels of oil
Hole (feet) per ton ft. column | square, mile jper square mile
Rr oO) 27209 138.282 -1139,197.,,000] 91,764,000
72.0 27.79 136.800 |137,664,000} 91,084,000
74.0 28.55 143,708 | 140,468,000 95,427,000
92.0 30.97 190.898 | 172,060,000} 126,874,000
92.0... 31635 192.841 171,452,000] 127,977,000
72.0 30.20 146.379 | 135,099,000] 97,143,000
10.0 25.00 17 405. 19,403,000} 11,549,000
Heeeoceeccee|, 7820 31.20 162.872 + *|145,497,000| 108,085,000
Levcceee 70.0 31.78 148.352 [150,108,000] 98,448,000
Teoevecccees, 1160 30.89 "22.777 20,546,000; 15,111,000
Kecccccccces 82.0 29.22 162.278 | 155,061,000 107,855, 000
4h 0 31.65 92.949 81,851,000] 61,681,000
78.0 28.54 151 be 147,979,000 1007555,000
70.0 28.69 136.513 152,645,000} 90,609,000
93502 28.10 178.675 177,251,000] 118,589,000
69.0 28.27 132.992 |.131,084,000} 88,232,000
TL .5 27 54 134.854 136,465,000} 89,482,000
72.0 27637 135.084 137,580,000] 89,656,000
75.0 2747 141.157 13} 211} 000| 93,667,000
60.0 26.91 110.982 | 114,971,000) 73,664,000
Sye Qeececee| 7700 27.16 143.509 147}337;000 95,278,000
BoC. Levees! 60.0 33037 132.160 110,454,000) 87,758,000
J.BM. 6 90.0 30.02 182.070 | 169,095,000) 120,834,000
LeVe Doe 60.0 29.80 120.660 {112,880,000} 80,196,000
L.V. 135. i 60.0 32.75 130.280 1 110,872,000} 86,454,000
Totalecesees| 175067 3,305.918 |
AVEragescece! 68.2 i 29.435 L 1.985 | 128,687,000] 89,866,000
All diamod-drill holes except marginal holes G and J
Totalecceeee) LO&.7 j [3.345.726 y
Averageseses! 13-2 | 29655! 1.986 1 138,104,000} 96,508,000
General Petroleum wells
28-19-G | 70.0 OT ede 132.020 133,677,000] 87,654,000
2h-12-G i 30.0 29. 60.500 56,357,000} 40,108,000
66-5-G | 90.0 26.37 163.710 | 173,793,000| 109,118,000
B4-15-G 60,0 28.94 117.970 117,675,000} &1,084,000
Totalecees. | 250.0 ; 474.200
AVEragesees 62.5 27-76 1.997 119,124,000! 78,735,000
All holes
Totalesssee | 1955-7 T3, 060.118 °
Averagesses 67h 29.43 | 97h 127,349,000 | 88,326,000
All holes except marginal holes G and J
Totaleeeeee | 1934.7 | 3,819.936
AVeErageseee (LT 29.13 1.974 1135,475,000 | 93,962,000
4025 -10-








SECTION B-B'

HORIZONTAL SCALE
20 mines Te 40 mies

AVERAGE WEIGHTED OIL CONTENT

EL. 9000 FT.

Aw Winin 3 cs:
avon LX) Ni \ np # Are

VG Va \ ti :
ooo moe yy iY Yj; < an :

yo %0.0.
EL. 8000 FT. LEGEND OF,
TFEH ZON au i
BARRELS OF OIL PER SQUARE MILE IN MILLIONS
ZONE OF 18 GALLON SHALE
(480) BARRELS OF OIL PER SQUARE MILE IN MILLIONS
Bb

A
MAHOGANY MARKER Gp

EL. 4000 FT.



HOLE A
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION GREEK AND PARACHUTE GREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE HEAD OF THE SOUTH PRONG
OF THE EAST FORK OF PARACHUTE CREEK (NE./¢ SEC.12,T6S.,R95 W. OF THE 6TH
P.M.) AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE

BUREAU OF MINES.
GARFIELD COUNTY, COLORADO

GALLONS PER TON GALLONS PER TON GALLONS. PER TOW
© 10 20 30 40 80 60 70 00 210 20 30 40 $0 60 70 80 © 10 20 30 40 80 60 70 00
x0
260
20 20
20 20
230 o
20 80
210 cy
200 10
«'
a «
x190 © 00
© x
€
“ &
= <
v0 v0
>
z >
Z0 Zu0
° <
O10 © 20
x °
<0 Zis0
z <
"0 20
w
> =
Zi20 0180
a 4
Ho wy
< wo
+100 +170
w w
Wy 90 100
rs rs
20 190
10 200
6 210
50 220
° 230
30 240
20
eu.ro81
10

TOTAL LENGTH OF SECTION- 799 FEET

183 FT. OF PLUS IS GALLON SHALE....... . 37FT. OF PLUS 30 GALLON SHALE
SELECTED SECTIONS

ener | pmo | ro | catows ren tow] qiOhe it, | BARNELSLOE ie

TSFT| +23 FT|-50FU 27.666 | 139,197000| 91,764,000

Gert | ¥23 FT|- 62Ft] 25.140 | 164,783000/ 98,604,000
aeorr. | +39ert|-64Ft| 15.056 | 966,405000| 346,433,000
Geert | casert|-1sort| 12.276 | 1388:e01:000| soereszi000
Titer | sasere|-20srt| 11.336 | sselese;poo| 422.808,000

CORE SAMPLES DRILLED IN 1945

Figure 36.



AKOLT No.2
STANDARD OIL COMPANY
OF CALIFORNIA
OL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE GREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE NORTH END OF CONN CREEK
(SW. SE. NE., SECTION 7, TOWNSHIP 6 SOUTH, RANGE 97 WEST OF THE 6th P.M.)

GARFIELD COUNTY, COLORADO

9a esse teee
meno e398 1
v0
”
0
=
°
we
wo
”
2
»
oo
: * ao
« «
‘
‘ Sexo
: a
we ‘
a
> 800 :
. z <0
: Tiv0 :
. 2 00
: <0
:
a a °°
0 :
:
180) ial
. > : 10
> ° 100 .
° . oo
‘ “110 .
2
10
. ."
sue “
: = 0
100 -
100
1
«
we
we
0
=
in porrout eL.7348
TOTAL LENGTH OF SECTION..770 FEET
200 FY. OF PLUS 18 GALLON SHALE... s....s 10.188 PT OF PLUS 30 GALLON SHALE
BELecTeD sections
rrom sOvVARE MLE
a 136,488 000
| eae i7aioasooo
Betsre | errr yoserrospes | $rF'seaoco
Somat [esearr \ieersre(oce | abolaseioce

CORE SAMPLES ORILLEO IN 1948

Figure 39.



MAP OF NORTHWESTERN COLORADO

SHOWING THE GREEN RIVER FORMATION WITH
LOCATION OF SAMPLED OIL SHALE SECTIONS

ae. 10 MILES

LEGEND

BOUNDARY OF GREEN RIVER
FORMATION,

NAVAL OIL SHALE RESERVES
‘No.1 AND No.3.

IGNEOUS ROCKS
OIL WELL CUTTINGS

° GORE SAMPLES

+ SURFACE CHANNEL SAMPLES
A“~eA' SECTION

_ SCALE 500600
3 Soe ee

Pa
LA
q
>
>D de
LA

PLATE No.
SECTION 4-4‘
SECTION 8-8"
SECTION C-c’
SECTION 0-0"
SECTION E-E'
SECTION F-F'

SEE BELOW FOR OTHER PLATE REF.
EXPLANATION

Noasun

&] company | NAME

@

j2N|96W) 14 US.G.S. LOGATION “F*
IN|96W| 36) U.S.G.S. LOGATION "J"
IN}97W 11 |EMP G.&F. CO. | LOCATION
IN 19} USGS. LOGATION "E"
2S) 19] GEN. PET. |GP-28-19-G. |9
2S} 5 | GEN. PET. |G.P-66-5-G. |I0
2s} 12] GEN. PET. | G.P-24-12-G. |II
2S) 15| GEN. PET. | G.P-84-15-6. [12
SS|IS4W) 3 B.0F M. HOLEG |I3
/0|SS94W! 6 B.OF M. HOLE F |i4
11 |5S|94M\20| B.OFM. HOLE I |I5
/2|\5S94N) 22| B.OF M. HOLE L |I6
/3|SS94W 24) B.OF M. HOLE J i7
/4|/5S96W| 2 8.0F M. HOLEE |i8
/5|5S'95W 11 B.OF M. HOLE D |I9
/6 |5 S\95W|IS1G COLUMBIA 0.S.| COLUMBIA S.S|20}
\/7 |S SI95W/ 19 |UNION OF CAL |BELLA CASTLE {21
|/8|5S|S5W) 19 | UNION OF CAL. |LINDUAR POINT |22)
/9|5S|S5W) 20] UNION OF CAL. |LIGNUM VITA 9/23)
20/5 S|95W\ 21 |UNION OF CAL. |LIGNUM VITA 13124}
}2/|5S|96w/| 23) B.OF M. HOLEH ([25|
\22/5Si97W) 2 | SUN OILCO. |SUMMERSGAMAZ6|
ISSIS7W|20] SUN OIL GO. |MAGERS CAMP [27|
ISS|97W| 25] SUNOILGO. | BEAR RUN |28|
|SS|SBW) 9 |FEDERAL 0.S. |COTTONWOOD!/29}
|S SI98W) 9 | STD.OF CAL. | SYND. No.2 |30)
ISSI99W) || | STD.OF CAL.| SYND. No.1 |31
pspawes W.M. FELTS |CARR CREEK |32|
|6S95W 5 | B.OF M. HOLE K [33
16SI9SW)12| 8.OF M. HOLE B_ /34
|6S|95W| 12) B.OF M. HOLE CBS
|6Si95w| 12|  8.0F M. HOLE A B6
J6S/95Wi22| B.OF M. ALLEN POINT |37|
16SB5W/30| B.OF M.  |COTTONWOOD/37|
IGSISW)10 |UNONOF GAL. | J.B.M. No.6 /38}
|6S|97W| 7 | STD.OFCAL. | AKOLT No.2 [39]
|6S|97W) 17 | PURE OIL GO. | CONN CREEK /40
l6Sj98w| 3 |FEDERAL 0.S. NEWTON POINT|4 1
|6S}9SW) 14 | STD.OF CAL. | AKOLT No.| |42)
16S|96W) 17 | STD.OF CAL. [SCOTT FEE Nal|43)
|6S96W24| STD.OFCAL. | AKOLT No.3 44)
|7S|94W! 36 | PURE OILCO. | BATT. MESA }45|
\7S|97W 7 | W.M.FELTS | LONG POINT |32)
‘S}7W2I |FEDERALO.S.| ECHO 3 jae

ISS{95W| 9 | W.M.FELTS | WALLACE CR.|32)
CONTOUR MAP OF 25-GALLON SHALE |4e
CONTOUR MAP OF I5-GALLON SHALE |49}

Zo F lprare

CBVAGAUN~| No.

yn,
Gz

THe

S

as

GRESBRVRART

BeVeag

&

EY

LY

a

Figure 1.



Grade Area, Thickness, Oil, gal. Total

of shale square miles feet per tan parrels of oil
25~gallon... 660 107.9 25.21 82,798,000 ,000
15-gallon 660 654d 15.83 329 743,000,000

Total partly blocked and inferred shale 1s shown below:

Area, Barrels of oii‘ in millions
Class of reserve Square miles | 25-geallon shale 15-gealion shale
Partly DLOCKedeeceecece 340 2,775 163,975
Inferred.ss.e. 660 82,798 329 743
1,000 125,513 ! 493,716
CONCLUSIONS

A more accurate estimate of oil-shale reserves in northwestern Colorado
has been made possible by additimal sampling. It is indicated that the
reserves are much larger than originally reported. The sampling data are too
meager to attempt to make a firm estimate of the total oil-shale reserves
that may be contained in the basin. Information from additional drilling
may necessitate a revision of estimates, vertical sections, and assay contours.

4025 -9-


‘sunrace 41. 78104

reer

J. B. M. No.6
UNION OIL COMPANY
OF CALIFORNIA
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE EAST SIDE OF PARACHUTE CREEK (NW. SE. NW, SECTION
10, T6S., R.96 W. OF THE 6th PM.)

GARFIELD COUNTY, COLORADO

ALLOWS PER TOM aacions rem row eauioe ren TOW
© 19‘tp 20 40 80 40 70 80 913.20 30 40 0 00 70 89 13 "50 00 40 60 60 70 00
200
m0
s70
00
80
s00
0 a
st0 3
Py
»
190
190 20)
170) 40]
eorrou a7:
TOTAL LENGTH OF SECTION - 376 FEET
213. FT. OF PLUS IS GALLON SHALE ...... 39 FT. OF PLUS 30 GALLON SHALE
SELECTED SECTIONS
To | eattone rete’
e ren rom | souane wie
TT6 Fr 189,088,000
276 er 281,382,000
770,670,200

CORE SAMPLES DRILLED IN 1948

Figure 38.



CONTOUR MAP OF I5-GALLON SHALE
PICEANCE CREEK BASIN
RIO BLANCO & GARFIELD COUNTIES, COLORADO

CONTOURS IN MILLIONS OF BARRELS PER SQUARE MILE
JULY SCALE 1950
9 ma 10 20
LEGEND

OIL WELL CUTTINGS
SURFACE CHANNEL SAMPLES

CORE SAMPLES
AREA ESTIMATED IN REPORT

ESS] BOUNDARY OF GREEN RIVER FORMATION
NAVAL OIL SHALE RESERVES No.| AND No.2
GEES IGNEOUS ROCKS

___A
TD,
Z

te

RS)
X y IGELY ,
FRY y S ¥ ~~ J
\ : Sy
NY IR hf oe bn
N J rt YSN
‘, \ Sit | L
SI SNG
>; |——+$ SE b_
m <7 ACTED ae
\ siniolerahca m

4s
|
Le
_—

Vi:

a

Figure 49,










BELLA CASTLE No.!
UNION OIL GOMPANY OF GALIFORNIA

OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE TIP OF LINOAUR POINT,
(NW. NW.SE,, SECTION I9, TOWNSHIP 5 SOUTH, RANGE 95 WEST OF THE 6th P.M.)

GARFIELD COUNTY, COLORADO

eALLons pan Tow ‘eaLions pan TON
10 "to 2030 40.

"so #0 4070 00 et ‘Sp €0 70 ec
0
0
00
0
00
20
00
00
10
00
| 00)
Py
0
» » #00
exo :
Py © 400
3 000 2
“0
700
400
. .
rao] |
re0
340) anoea
rr
a
700
a0
320]
00
1300)
0
neo
TOTAL LENGTH OF SEOTION..1033 FEET
172 FT. OF PLUS 15 GALLON SHALE cerssssesss3® PT OF PLUS 3O GALLON SHALE
SELECTED SECTIONS
tewern | mom 70 [eatuows PER Tow
wal 7 & 3537 ‘87,786,000
129 tt] eos tt 28.07 280,097 149)
479 1.] +403 fe 18.09 1,007,883,000
ree tt.| sees tt] - 76 t a 1,887,984,000

GORE SAMPLES ORILLED IN 1948

Figure 21.



LIGNUM VITA No.9

UNION OIL GOMPANY OF CALIFORNIA

OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION GREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION ON LINDAUR POINT (NE. NW. SE., SEC.

20, TOWNSHIP § SOUTH, RANGE 95 WEST OF THE 6th

eatom
© 108 3040 80

‘sunrace aL 7870
et

“0

196 FT.

Pen TOW

.)

GARFIELD COUNTY, COLORADO

ALONG PER Tom
‘7000 6 0

"20 00 6070 00

sanoemer
MAREeR. 0
i toers

Low MANoeANY MARKER

TOTAL LENGTH OF SECTION..678 FEET
OF PLUS 15 GALLON SHALE vee

}3 FT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS

row To [eauows pan row

con] 8 nl-eo 000
rin tt] ees rt. {000
836 1.| +433 | -103 fe 408,342,000

tu | vers t.| -103 432,487,000

CORE SAMPLES DRILLED IN 1948

Figure 23.





HORIZONTAL ScaLE

SECTION D-D'

AVERAGE WEIGHTED OIL CONTENT
Lawes] MILLIONS OF BARRELS.
aries

prow 10

° owes tomes
a |ac.nove| wove F
fec.nouelnove o [v7.0] 100.8 | cors
x 5 5 °
su.sooorr, § H 5 3 °
5 8 |
: » 3 3 8 = . 3
3 g z S$ 2 3 8
3 fe € 3 —€ 8 5
FY : ge S$ 3: 8 xa «
: 5 § EAENE Es H
3 2 ef \e/\e 183 Hy
. 2 . z €
5 Es
= $
§ =
[\i
3 Ww
2
2
5

—

a

\
.

bt
bt

OVERNMENT CREEK

EL. 6000 FT.

LEGEND
ZONE OF 25 GALLON SHALE
(180) BARRELS OF OIL PER SQUARE MILE IN MILLIONS

ZONE OF 18 GALLON SHALE
(618) BARRELS OF OIL PER SQUARE MILE IN MILLIONS

——— MAHOGANY MARKER

gL. 8000 Fr

TRUE SECTION

fet 6000 FT.

Sunes

HORIZONTAL SCALE

tomnes weMes

Figure 5.



HOLE H
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION ON THE NORTH SLOPE NEAR BEN GOOD
CREEK (SE. SE.NW., SECTION 23, TOWNSHIP 5 SOUTH, RANGE 95 WEST OF THE 6th P.M)
AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

eALions ran

eaLLone ren
ep 30.40 60

0
300

on 200

eo

oso t70

eso 00

o30

0 40

te > .
Sar0 tuo «
Fae cary *
: :
Pi 2 >
“ 170
iad :
peo > 00 :
3 ° °
S20 : :
3
te _te
: >
400 120 :
300 ue
300 100 :
270 v0
a00 *
300 70
0
a0 s0
sorrow
a0 ° wire

19 FEET

TOTAL LENGTH OF SECTION
: . 41 FT. OF PLUS 30 GALLON SHALE

350 FT. OF PLUS 15 GALLON SHALE.

SELECTED SECTIONS

Bannnis oF on
Pan souane wice

108,

re is Fe

et. [+470 et] -
G19 FY. |+ 879 FT.

CORE SAMPLES OMILLED IN 1949

Figure 25.



Ad.
he,
43,
Alp,

45,
46,
47,

48,
4g,

4085

ILLUSTRATIONS

Map of northwestern Colorado.
Section A-A',
Section B-B
Section C-C'.
Section D-D*

Surface sections, Empire Gas & Fuel “G6!
Surface sections, U. S. Geological Survey
28-19-G well, General Petroleum Co. .
66-5-G well, General Petroleum Co.
24-12-G well, General Petroleum Co. .
84-15-G well, General Petroleum Co. .
Hole G, Naval Oil Shale Reserve No.
Hole F, Naval Oil Shale Reserve No.
Hole I, Naval Oil Shale Reserve No.
Hole L, Naval Oil Shale Reserve No.
Hole J, Naval Oil Shale Reserve No.
Hole E, Naval Oil Shale Reserve No.
Hole D, Naval Oil Shale Reserve No.
Columbia surface sampling Columbia oil Shale Co.
Bella Castle No. 1, Union Oil Co. of California..
Linduar Point surface sampling, Union Oil Co. of
California....ssseeeeeeoees seen eee eeeeeeeeeeees
Lignum Vita No. 9, Union Oil Go. of California..
Lignum Vita No. 13, Union Oil Co. of California...
Hole H, Naval Oil Shale Reserve No. 1
Summer's Camp hole, Sun Oil Co.
Mager's Camp hole, Sun Oil Co. .
Bear Run hole, Sun Oil Co. ....
Cottonwood surface sampling, S,0,.S. oil shale
property..... cece eeeeeee eee cececcrseaes eeccceee
Syndicate No. 2, Standard Oil Co. “oF California.
Syndicate No. i Standard Oil Co. of California...
Surface section, Wayne M. Felts.....cseeeee
Hole K, Naval Oil Shale Reserve No, 1
Hole B, Naval Oil Shale Reserve No. 1
Hole C, Naval Oil Shale Reserve No, 1
Hole A, Naval Oil Shale Reserve No. 1l..
Surface sections, Naval Oil Shale Reserve No. 1.
J. B. M, No. 6, Union Oil Co. of California..
Akolt No. 2, Standard Oil Co. of California
Conn Creek surface section, Pure Oil Co. .... .
Newton Point surface sampling, Federal 0il Shale
COL cece es cnccee ree ceececeeeeeeseeeneee see e ences
Akolt No. 1, Standard Oil Co. of California....
Scott Fee No. 1, Standard Oil Co. of California.
Akolt No. 3, Standard O11 Co. of California....
Battlement Mesa hole, Pure Oil Co. ........0.
Echo No. 3 surface sampling, Federal Oil Shale con
Specific gravity and oil yield of Colorado oil
SNELOS cece sec ecceceecceeceeesceeseeeressenees
Contour map of 25-gallon shale (Mahogany ledge).
Contour map of 15-gallon shale..

-aii-

Follows

DNF FHONYNYONMY YNYONYMYNNMYHYNNHYNM NHYNMNNYNMN POPU DVOVOOSHHSHHAannnnnfy




24-12-G WELL
GENERAL PETROLEUM CORPORATION
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK, PARACHUTE CREEK AND
GARDEN GULCH MEMBERS OF THE GREEN RIVER FORMATION ON THE UPPER NW.
FLANK OF THE PICEANCE CREEK STRUCTURE, (SE. SW. NW.,SECTION I2, TOWNSHIP 2
SOUTH, RANGE 96 WEST OF THE 6th PM.) AS INDICATED BY THE FISCHER METHOD AT
THE LARAMIE STATION OF THE BUREAU OF MINES.
RIO BLANCO COUNTY, COLORADO

eassgng ren roe eauegne ny enctoms
arr fo sos oe
sonrsce nuzted sco
wo
00
00
we
200
wo
ww0e
« 280
. ony
: 00
ve0e :
‘
: veo . .
© . 0 .
. i : * 1200
= 00 . : : :
5 oe Lae ‘ ‘
afess a < 2 * ooo
: so
0 :
: » 400 : :
a bol < 1080 <
: = : = sree
as : : :
: F soe :
m0
2 ¥ B00 s .
° ca ca 4 1800)
* 180 . .
ss
ta00
.
100 : : .
: a : : :
. Aid : :
woe
wo MaWocaNy
rer
ssc0
wws0
2
, v0
reve
reo sorrow
woe Facts
TOTAL LENGTH OF SECTION - $003 FEET
0 FEET OF PLUS 18 GALLON SHALE - 88S FEET OF PLUS 30 GALLON SHALE
SerecTeo GecTions
ca To enuone Fen Tow SaaS
son] are Ford
won| cen z
soon | 423% ‘3.00
aasn| seanfison| tare

ROTARY CUTTINGS DRILLED IN 1947

Figure 11.




GOTTONWOOD SURFACE SAMPLING
S.0.S. OIL SHALE PROPERTY

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE GREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE CLIFF EXPOSURES NEAR COTTONWOOD CREEK (NW. SW.,
SECTION 9, TOWNSHIP 6 SOUTH, RANGE 98 WEST OF THE 6th P.M.)

GARFIELD COUNTY, COLORADO

eALLons

© 10 8 30 40 a0 60 80
or aL. 7748)
a0 ®0
400]
sugrosany
470] aaRteR o
an
400 0
00 »
© a0 . = 40
© 400 . © 6
2 2 Py
a0 «
z 2
° © a0
Py 2
100
=
wo 180
u 340 oy
30 140
380 190
a0 100
00 170
eso auroras
00
s70

TOTAL LENGTH OF SECTION 8055 FEET
198 FT. OF PLUS 15 GALLON SHALE a 48 FT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS

aes tt.
-7o8 tt.

“IT 78H.
irr ste 14.48 1,083,831 ,000 | __363,321,000

CHANNEL SAMPLES TAKEN IN 1926 BY FRED CARROLL

Figure 29.





HOLE L

DRILLED BY THE BUREAU OF MINES

ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVAQUATION CREEK AND PARACHUTE GREEK
MEMBERS OF THE GREEN RIVER FORMATION ON THE SOUTH SLOPE OF NORTH WATER
CREEK (NE. Sw.'%/4 NW.'/@ SECTION 22, TOWNSHIP 5 SOUTH, RANGE 94 WEST OF
THE 6th P.M.) AS INDIGATED BY THE FISCHER METHOD AT THE LARAMIE STATION
OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

CALLONS PER Tom row
1o80'5040,

° We"a3'70 80 2% 00
a0 :
a0 :
i
aso s00 3
i
a0 3
s30 3
oro ao :
2
ero sro
200 00 5
wave
* “an
e400 Bat)
Faro
«
«
2
“aso i
Sato :
400 °
300 : 2
“40
.
°
aro we 2
300 me
Ho .
100 :
330 *
ato a sr yeao
TOTAL LENGTH OF SECTION....719 FEET
140 Ft. OF PLUS IS GALLON SHALE 24 FT. OF PLUS 30 GALLON SHALE
SELECTED SECTIONS
Tawern | om caso Toms pan] eannace oF on
ne ial re 8 PER Tow SQUARE MILE PER SQUARE WILE
aart| ~ ee] ore
= 80 Fr.
0 FT.
ce3 Ft.

CORE SAMPLES DRILLED IN IDam

Figure 16.



«70

SUMMER'S CAMP HOLE
SUN OIL COMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE WEST FORK OF PARACHUTE GREEK (NE NE SE, SECTION
2, TOWNSHIP 5 SOUTH, RANGE 97 WEST OF 6TH PM.)

GARFIELD GOUNTY, COLORADO

enLLome pen Tow aLLons Pen TOM ‘ALLons PER TOM
10 80 30 40 80 80 © “Io 20 30 40 80 40 to 210 80 20 40 80 €0
#00
140
190
wo
100]
100
10)
170
160
: we
= 10
= wo
<n
2 20
190
z 210
Eno
: © a0
S110 .
z 7
a" "0
” <
. 280
> 60 2
8 eo
<7 #1
o
: Pied
= 0 :
: © a80
” °
= 100
oy <
230
0
a0
°
B20
ER © °
3 m0
10
#0
‘0
0
g» 5
Ff = a0
S60 .
i & 300
>
: 90
g°
g 400
i
2 a0
©
2 ato
30
: 0
“0
480
0
ne
TOTAL LENGTH OF SECTION ~1329 FEET
837 FT.OF PLUS IS GALLON SHALE... 84 FT.OF PLUS 30 GALLON SHALE
SELECTED SECTIONS
cou [to [eatsons van tom] savant ike
ris.2tr[-7e [1 28.10 | 177,251,000
+37 tt|-94 tt] 26.02 | 284028000
[ose rt |-reaere| 18.01 |2,339,723,000

CORE SAMPLES DRILLED IN 1948

Figure 26.



«
<
2

veer

28-19-G WELL
GENERAL PETROLEUM CORPORATION
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK, PARACHUTE CREEK AND
GARDEN GULCH MEMBERS OF THE GREEN RIVER FORMATION ON THE UPPER SE.
FLANK OF THE PICEANGE CREEK STRUCTURE, (SE. SW. SW, SECTION 19, TOWNSHIP
SOUTH, RANGE 96 WEST OF THE 6th RM) AS INDICATED BY THE FISCHER METHOD AT
THE LARAMIE STATION OF THE BUREAU OF MINES.
RIO BLANCO COUNTY, COLORADO

rom 12 pen TO8 ren ron ran row
2 ar te te otionts mo ae
t10
s00
. mo
: 0
: ta00
700 i
i
: 400)
3 wo
: 1100
oo s
100
53 ao
3 ‘000
: . «
0 : . :
Ee . :
: w00 <
: 3 to00
i
saonnne
“osgten" 0 >
mites :
f
: 100
0 x >
S100 °
2 4
: i700
«0 :
3
: ure :
2 . :
: = 1000
a0 >
3 00
: mo
1100
. se00
200 :
ose
wo
1000
1900
00
w00
a0
TOTAL LENGTH OF SECTION- 2656 FEET
470 FEET OF PLUS 15 GALLON SHALE....... cesses +s 30 FEET OF PLUS 30 GALLON SHALE
SELECTED SECTIONS
Te SALLONS PER TOW rei
“son | area
<non| 84.03
wor| 18.00
<ie3e rt] tee

ROTARY GUTTINGS ORILLED IN 1947

Figure 9.







GONN CREEK SURFACE SECTION
PURE OIL COMPANY

OL YIELOS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
‘RIVER FORMATION TAKEN FROM A SURFACE EXPOSURE ON THE WEST FORK OF CONN
GREEK (NE. Ys Sw./4 NW. SECTION I7, TOWNSHIP 6 SOUTH, RANGE 97 WEST OF THE
6th P.M.).

GARFIELD COUNTY, COLORADO

anyone, reno
seanr0 Sta Sha te
“ama

MAnoeany

eetow
3

TOTAL LENGTH OF SECTION....43 FEET
39.8 FT. OF PLUS IS GALLON SHALE........... 22.8 FT. OF PLUS 30 GALLON SHALE

WEIGHTED SECTION
tamern | rnow | ro [eationsran ton]

one Fi
2QuARe MILE
ast [-st |-sert| 29.76 (80,903,000 | 67,326,000

CHANNEL SAMPLES TAKEN IN 1921

Figure 40,







HOLE G
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION GREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE HEAD OF TRAPPER'S CREEK
(NW. SW. NE. SEG. 3, TSS. RO4W. OF THE 6th RM.) AS INDICATED BY THE FISCHER
METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

GALLOWS PER TOM
2.10 80 30 40 80 #0

sonruoue.708
‘0 00
fue "
Suc -
:
= 0
Feo w]
3
z 10 ato
:
so
3 ao sro]
* 40] © 200)
5 Pr
* 200
:
10 me
° m0
>
0 = wo
20 3340
0 {seo
:
«| wee
So _
eo ° wo
: .
» + wo
ute) = a0] 0)
Yao 3 te
0 Five Lao
200) n

00 100
° tr sorrow reat
140 100
2 wo)
TOTAL LENGTH OF SECTION..926 FEET
05 FT. OF PLUS 18 GALLON SMALE........... © FT. OF PLUS 30 GALLON SHALE

‘SELECTED SECTIONS

ener ou | to [eattons ran row
To tr ati 25.00
son) + er te 16.

815 f| +401 ¢ 10.

+437 tt] *.

CORE SAMPLES DRILLED IN 1949

Figure 13.



MESA SECTION A-A'

> oS.

lip ~—~~_

LTT] |
Vu

——— MAHOGANY MARKER QS TM~
---— PROBABLE LOWER LIMIT OF 15 GALLON SHALE ~
—-— PROBABLE LIMITS OF THE GREEN RIVER FORMATION

TRUE SECTION

ft. 10000 Ft.
frc-aeo0
noe tees
HORIZONTAL SCALE
° sunes tomes 20 MNES somes









LOWER PICEANCE CREEK SURFACE SECTION

EMPIRE GAS and FUEL GOMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION TAKEN ON THE EAST SIDE OF LOWER PICEANCE GREEK (SECTIONS
11 AND [4, TOWNSHIP | NORTH, RANGE 97 WEST OF THE 6th PRINCIPAL MERIDIAN) AS

INDICATED BY

10.0 FY. OF PLUS 15 GALLON SHALE...

THE RESULTS FROM FIELD LABORATORY METHODS. (FIELD LOCATION !)
RIO BLANCO COUNTY, COLORADO

GALLONS PER TOM
0 & 0 Bp 30 40 80 a

3

a

TOTAL LENGTH OF SECTION...
ee 8.

reer
T. OF PLUS 3O GALLON SHALE

SELECTED SECTIONS

tener

prow ro | eatione pan row

‘9.0FT.
28.07.

ToLtet| 100 Fr|
eeirt| 110.1FT]
ort) 280.1FT|

84,697,000
680,244,000

CHANNEL SAMPLES TAKEN BY THE EMPIRE GAS AND FUEL COMPANY

Figure 8.





SUMMARY

This report is the first of a series dealing with the oil-shale reserves
of the Green River formatim in the Rocky Mountain Region.

The known oil-shale reserves of northwestern Colorado at present con=
sidered to have economic value apparently are confined to the Piceance Creek
basin between the Colorado and White Rivers.

The number of sampled sections is small, but there can be little doubt
that the Piceance Creek basin is a potential source of enormous quentities
of liquid fuels and the related byproducts obtained fran oil-shale processing.

The partly blocked and inferred oil-shale reserves of 25-gallan~a-tm
shale are estimated to have an oil yield of 125 billion barrels, and the
reserves of 15-gallon-a-ton shale are estimated to have an oil Field of 49h
billion barrels.

“The number of available sampled sections is inadequate for making firm
estimates...

INTRODUCTION

The oil shales of the Green River formation in northwestern Colorado
comprise an important natural resource for the production of synthetic liquid
fuels. The area covered by the formation in Colorado is about 2,590 square
miles (fig. 1).

Prior to 1944, a large amount of reconnaissance work had been done in
estimating these reserves, but most of the sampled sections contained only
occasional beds that had been assayed for oll content. In 1944, the assay
logs of oly five surface sections and one diamond-drill hole were available.
Since that time o11 companies have core~drilled 13 holes and taken eight
surface sections. During the same period the Bureau of Mines core-drilled
12 holes, tock two surface sectims, ahd assayed the cuttings from four oil
wells. A purpose of this report is to record all the sections assayed to
date. . . oe

ACKNOWLEDGMENTS

This report was prepared under the supervision of Emery M. Sipprelle,
chief, 0il-Shale Mining Branch, Rifle, Colo.

Appreciation is expressed to the Columbia Oil Shale Co., the Federal Oil
Shale Co., the Union Oil Co. of California, the Standard Oil Co. of California,
the General Petroleum Corp., Wayne Me Felts, the Empire Gas & Fuel Co., the
Sun Oil Co., and the Pure Oil Co. for their valuable assistance and cooperation.

4085 -1-


econanic importance. In estimating 25-gallon shale, no consideration has
been given to 400 feet of 25,4-gallon shale that occurs 800 to 1,200 feet
below the marker in General Petroleum's 66-5-G well (fig. 10) and which is
also indicated by electric log to be in its 84-15-G well.

The tabulated results from the 25 diamond-drill cores and the cuttings
fran four oil wells are shown in tablés 1, 2, 3, and 4, This tamlatim
includes a high-grade section averaging 28 to 33 gallons a ton, an average
25-gallon-a-ton section, an average 15-gallon-a-ton section, and an average
10-gallon-a-ton section. Each of these sections has been broken down into
the following five groups; all diamod-drill holes, all diamond-drill holes
except marginal holes G and J, General Petroleum wells, all holes,: and all
holes except marginal holes G and d.

Omitting marginal holes G and J, the average oil yield for 25-gallon-a-
ton shale is 127 milli barrels of oil per square mile, and for a 15-gallon-
a-ton shale it is 414 million barrels of oil per square mile. If the four
General Petroleum wells are included, these figures become 125 milli and
500 million, respectively. The diamond-drill holes are all m the south
end of the basin.

Estimates of reserves are based on total oil yield and do not take into
consideration any losses in mining or processing. All 15-gallm-shale
estimates include the 25-gallon shale.

Partly Blocked Shale

Sample data are meager, but the oil-shale deposit is remarkably unifom,
increasing in oil] content as the center of the basin is approached. With
this in mind, the 23 diamond-drill holes partly block an area at the south
end of the basin of approximately 300 square miles, and the four General
Petroleum wells partly block an area of approximately 40 square miles. The
estimated partly blocked reserves are shown below:

e5-gallon shale i 15-gallon shale
Area, | Oil T BL. of | [ Oil j) Bbl. of
square | Thickness,, gal. | oil (in |Thickness,! gal. | of1 (in
Location miles feet per ton | millions) feet _|per ton} millions)
South end 300 109.3 | 25.22) 38,138 537 9 15.42 | 12h,27%
GP. wells ho 100.0! 25.12' 4,637 1,187.5 16.95 | 39,699

1
Totaless! 340 | : 142,75 ! p/163 975
1/7 All 15-gallon estimates include the 25-gallon shale.

Inferred or Probable Shale

From the sections taken by Dean E. Winchester fram the Cathedral Bluffs
portion of the basin, it is possible to infer that the whole basin contains
approximately 1,000 square miles of Green River oil shale, of which the
remaining portion of 660 square miles, not included as partly blocked shale,
is classified as inferred or probable shale in the following table:

4025 -8-


Manogany
‘MARKER ©

SURFACE SECTIONS
WAYNE M. FELTS

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION TAKEN FROM SURFACE EXPOSURES ON LONG POINT, CARR CREEK
AND WALLACE GREEK, AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE
STATION OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

LONG POINT CARR CREEK WALLACE CREEK
SEC.7, T.7S.,R.97W. NE. /4 SEC. 29, T.58., Nw. Yq SEC.9, T.85.
OF THE 6th'PM. R.99W. OF THE 6th. RSW OF THE 6thPM.
© 19't0°0 4080 60 70.00

EET AMOVE MARKER
a

MAHOGANY
MARKER

wanwen

per tanerw or ecotron | rive te eaccennut | Pose $0 enema

Tone PonT S53FT

Cann OREEK BFE 1S FE

WALLACE eneex S3.2 FT. 12i9Fr

SELecTES sections

tone Tesetn [prow [ro [eats rantoa] baa. ran vam
Tone Poinr a3 Ft] 70 Ft|-ssFt] —es.0e 200
GARR onceK $35 et | to Fr[-sapee| 23:81 ‘Seiloaoo
Wallacecneex |4azetjomort|-seart| es.ea | seveeeioco|  s7'serooo

CHANNEL SAMPLES TAKEN 1946 BY WAYME MFELTS

Figure 32.







84-15-G WELL
GENERAL PETROLEUM CORPORATION

OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE TOP OF THE PICEANCE CREEK
STRUCTURE, (SE. SE.NE., SECTION 15, TOWNSHIP 2 SOUTH, RANGE 96 WEST OF THE
6th P.M.) AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE
BUREAU OF MINES,

RIO _BLANGO COUNTY, COLORADO

-
wo
~ :
: --
«no
: .
a | : : :
: : : _
: “a : :
2 : 1
2 : :
> ‘ eo
° . . <
= < 2
= aso] 2
: -
100 . »
° °
© 800! . Py
: 200
.
ae : :
ws
.
.
wo eoTTom
@auue i” Tom 1
are
By | aes

ROTARY CUTTINGS DRILLED IN 1946



All Bureau of Mines and-General Petroleum Corp. samples were assayed by the
modified Fischer method .at the Laramie station of the Bureau of Mines. All
core-drill samples taken by the Union Oil Co., Standard Oil Co. of California,
and Sun Oil Co, were assayed by the modified Fischer method in their
respective laboratories, The remaining assayed secions, mostly taken between
1920 and 1930, were assayed by other methods.

Relative Value of Drill Cores vs. Drill Cuttings
and Surface Sampling

No accurate check between core samples and oil-well cuttings is available
at this time. A comparism of the core and cuttings obtained near the bottan
of 66-5-G well indicates that assays of rotary-drilled oll-well cuttings
through the Green River formatim are fairly reliable but do not show the
true highs and lows obtained by core samples. Wire line core samples were
obtained fran the lower portion of the well. These samples, as received by
the Bureau of Mines, consisted of several thin disks fram each foot of core.
Weighted assays of the core obtained between 2,800 feet and 2,964 feet show
132 feet of core (32 feet not cored) cmtaining an average of 16,41 gallons
of oil per ton. For the same section the cuttings averaged 14.28 gallons of
oil a ton. Fran 2,800 feet to 3,015 feet, 181 feet of core average 12.91
gallons of oil a ton, whereas the correspading cuttings averaged 13 gallons
of oil a ton. The apparent increased ratio of oil in the cuttings in this
lager section was largely due to mud lag, as in this lower portion of the
hole the oil content of the core tapered off sharply. In the Bureau of Mines
diamond-drilling operations, cores through the Green River oil shales were
closely measured and weighted. It was found that the loss in overgrinding
was only 0.74 percent in the higher-grade shales (Mehogany ledge section),
whereas it was 8.18 percent in the lower-grade shales and 16.64 percent
through the siltstones and sandstones. A survey of Carter-Stanolind's Ute
Tribal No, 1 well showed the diameter of the hole through the overlying
5,825 feet of Uinta formatio to renge fram 9 to 16 inches, whereas through the
3,565 feet of Green River formation the hole retained an approximately con~
stant 9-inch diameter.

The above indicates that Green River oil-shale cuttings would be diluted
rather than enriched by caving and raveling. It is not know whether the
fines passing through the screens with the mud effect the semplo,

The assay results obtained from sampling clean surface exposures apparently
are about 15 percent under those obtained fran nearby core holes. In places,
cansiderable portions of good oil shale are covered by surface debris. Sane
of the short surface sections taken at these sites are not representative
and in same cases the rich Mahogany ledge muy have been missed entirely.

Most of the well-taken longer surface sections are in areas that have been core
drilled.

Information fran short surface sectios has been used only in those portions
of the area where more reliable data are unavailable.

4025 -4-


SCOTT FEE No!
STANDARD OIL COMPANY
. OF CALIFORNIA
OW. YIELOS OF OIL SHALE BEDS IN THE PARACHUTE GREEK MEMBER OF THE GREEN
RIVER FORMATION BETWEEN BRUSH CREEK AND CLEAR CREEK, (NE. SE. NE., SECTION
17, TOWNSHIP 6 SOUTH, RANGE 98 WEST OF THE 6th P.M.)

GARFIELD COUNTY, COLORADO

eunraon aL 7er7

00 280)

5
3
:
a0 30
3
= 10 Yao a0
* ‘ :
Tao 2 200] +00
‘
, 2
wo = *0
: <
:
: Seo
head °
2 :
Pir ¥ x0) veaneen
2 ine
a0 ¥ 100)
> °
< 120]

200

200 10
200 10!
#70 100]

TOTAL LENGTH OF SECTION.460.8 FEET

236 FT. OF PLUS IS GALLON SHALE .............32 FT OF PLUS 3O GALLON SHALE

SELECTED SECTIONS

To [eaiowe ran Tow
aa
SFT.
-T6SFT
CORE SAMPLES ORILLED IN 1948

Figure 43.



SECTION C-c'

HORIZONTAL SCALE

° tae somes to mes
== ee! a J
EL. 9000 FT.
H =
2 3 § Fa
3 2 3
Pa Ey 3 3
FA Fa = xx 2
5 Fd
3 2 * < ¢ Se z .
2 3 & 2 2 z z
ay . 2 & us x = é z
8 3 5 7 ge 3 gs &§ g
gy s° oo Be 3 3 g 3
52 te 3 52 2 i z
& 53 3 4 ro gu x x =
$3 3 32° i Hy z z
3g z fhe ge ® @ Fi
s rf wea 82 5 5 3
= z ¢ g nN 3
Pi FS 2
V 5
V i
Hy
yy Fa
s XX 84)
466
se ‘ety
REET
5
{
Je... 7000 FT. LEGEND

ZONE OF 25 GALLON SHALE
(137) BARRELS OF OIL PER SQUARE MILE IN MILLIONS

AVERAGE WEIGHTED OIL CONTENT

uenern| — wictions:
{8 OF OIL PER SQUARE MILE IN MILLIONS. rou | 10 “
ives [pp eat ewace
oe K [Hove e| 6.75 187.3
fac. Pr.[HoLe €[10.05 148 —
Hm MAHOGANY MARKER
——— PROBABLE LIMITS OF 15 AND 25 GALLON SHALE
TRUE SECTION
HORIZONTAL SCALE
8 MILES fo mies.
eee! )

Figure 4.



The Green River epoch has been estimated by Bradley3/ as lasting 5 to 8
million years, depositim occurring at a rate of approximately 1 foot in
2,000 years. Depending on the periodic rainfall, the lakes ranged fram fresh-
water, lakes to brackish marshes,

‘In general, the oil shale is a magnesium marlstone rich in organic
matter, The organic matter is chiefly remains of primitive aquatic plants
and animals, the major part of which is a structureless amorphous material
derived from the partial putrefaction of aquatic organisms that grew in the
lakes, The organic matter called kerogen is thermally decomposed by the
application of heat of the order of 800°F. and higher. The resultant liquid
product obtained by condensing the hydrocarbon vapors formed is shale oil.

The kerogen content of the oil shale is highest near the center of the
old luke basins, diminishing in all directions toward the shore facies. ‘The
sandy shore facies continue for a considerable distance after all appreciable
organic content has disappeared.

The Mahogany marker, which is a widely used reference bed in the main oil-
shale zone, is ean altered tuff layer 3 to 8 inches thick, camposed mostly of
minute crystals of analcite. This bed was deposited presumably as a nearly
horizontal ash or volcanic dust layer in the oil shale sequence. Its position
with respect to the assay logs is shown in figures 8 to 46,

After desposition of the Green River formation and perhaps to a small
degree during its deposition, movements of the earth's crust deepened parts
of the sedimentary basins and elevated other parts. The smounts of these
vertical movements is indicated by the different elevations of the Mahogany
marker which is about 2,000 feet below sea level at Roosevelt, Utah, 5,100
feet above sea level near the junction of Black Sulphur and Piceance Creeks,
8,200 feet at the oil-shale mine and 10,000 feet on Grand Mesa.

The lowest part of Leake Uinta in northwestern Colorado apparently corres-
ponds to the present trough of the Piceance Creek Basin. This trough has a
strike of N. 20° W., and its low point appears to be near the junction of
Black Sulphur and Piceance Creeks. Post Green River movement accented the .
depth of the basin and caused gentle southeast-northwest folding with some
parallel faulting. The results fran the partial sampling of the Piceance
Creek basin indicate that the organic content of the oil shales increases as
the low of the old lake basin is approached (see figs. 2 to 7).

SAMPLING AND ASSAYING
General
A total of 45 assayed sections are available, 26 of which are cores ‘fran
diemond-drill holes, 4 are rotary cuttings fram oil wells, and 15 are channel

samples from cliff outcrops. The locations of these sampled sections are
shown on figure 1, and the individual assay logs ere shown on figures 8 to 45.

3/7 Bradley, W. H., Origin and Microfossils of the Oil Shale of the Green River
Formation of Colorado and Utah: U. S. Geol. Surv. Prof. Paper 168, 1931,
58 PP.

4085 -3e






SYNDICATE No.2
STANDARD OIL COMPANY
OF CALIFORNIA
OIL YIELDS OF OWL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE EAST SIDE OF CLEAR GREEK (SE. SW. SW., SECTIONS,
TSS., R96 W.OF THE 6th P.M.)

GARFIELD COUNTY, COLORADO

eaL.ons ven rox ea.ions ren row eautons pen row
ogra no 40 40 40 outro 3040 bo 80 ovorgp ae #0 00 80
eunrnce L770
are 80 0
a0 100 oy
ato] a0 :
a0 10 i 00
a 00 x 0 ir
< ‘ 8
® 420) ao <
:
> a0 _ >
S s00 s10
° °
2 2
ase 200
2 aro) ois
< < sauoeane
sso 190 neta
cone
.
a0
ne 00
ae 10
oe 110
h orven n.
00 180

TOTAL LENGTH OF SECTION -494 FEET
238 FT. OF PLUS 16 GALLON SHALE 37 FT. OF PLUS 3O GALLON SHALE

SELECTED SECTIONS

cane
tawern Pan ecuane mie
TTT 93,276,000
4 FT. 97,276,000
("430 FT 904,487,000| 324,969,000

‘*1OFEET NOT SAMPLED

CORE SAMPLES DRILLED IN 1948

Figure 30.



MAHOGANY MARKER

Avove

veer

HOLE K
DRILLED BY THE BUREAU OF MINES
ON NAVAL OIL SHALE RESERVE No.|!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE EAST PRONG OF FORKED GULCH
(SW. SW. SW. SEC.5, T6S., R95 W. OF THE 6th P.M.) AS INDICATED BY THE FISCHER
METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

aauions ran Ton eaL.ons ren Tox OALLONS ER TOM
10 20 30 40 60 60 70 00 919 10 $0.40 80 60 70 00 © 10.20 $0 40 60 00 70 60
00 a0) 100)
420] 100
00] «0 00
a] 00] 190
00] mo S10
:
aso) a0 <0
3
0 370 > 100
0 0 300
a0 mo feo
ou $10
wo .TM to
a’ bf
aro] t ato
s00 310 °
ero) 300 Py
100) ot 0
20] ¥ t20 »
0 a0 °
m0 00 ©
ozo © a0 ”
we wo in
i
0 n0 40
:
a00 20 3 00
2
400 80 700
«0 00 in
00 190 be
400 ‘90 *
“40 170 100
sorrow e..r4i4

TOTAL LENGTH OF SECTION-797 FEET
240 FT OF PLUS I6 GALLON SHALE...... . . 37 FT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS
Yous Pan | sanneis oF
"

7

= 69 FT
+96 FT
+473 FT| -102 FT.

1,209,980,000 432,989,000

CORE SAMPLES DRILLED IN 1948

Figure 33.





ECHO No. 3 SURFACE SAMPLING
FEDERAL OIL SHALE COMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION ON THE CLIFF EXPOSURES BETWEEN BODISH GULCH AND LOGAN
wash (sw.¥e se. Se./4 SECTION 21, TOWNSHIP 7 SOUTH, RANGE 97 WEST OF THE
6th P.M.) AS INDICATED BY DETERMINATIONS MADE BY ROBERT A. BAXTER.

GARFIELD GOUNTY, COLORADO

‘GALLONS PER TON

10 0.100 30.40 80 80

MOAR

eurene

*0

mwAnoeany

“0

TOTAL LENGTH OF SECTION.
60 FT OF PLUS 18 GALLON SHALE.

60 reer
-18 FT. OF PLUS 30 GALLON SHALE

WEIGHTED SECTION
tamer | prow | To [eatconerenton:

Cort[eisrt.|-serr| 26.52

BARRELS oF on
mw saual

72,320,000

CHANNEL SAMPLES TAKEN IN 1949

Figure 46.



NORTH PICEANCE CREEK BASIN SURFACE SECTIONS
UNITED STATES GEOLOGICAL SURVEY

OIL YIELOS OF OIL SHALE BEDS IN THE GREEN RIVER FORMATION NEAR THE HEAD OF
FLETCHER GULCH, THE MOUTH OF YELLOW CREEK, AND THE LO7 RANGH ON WHITE
RIVER AS INDICATED BY PARTLY ASSAYED SURFACE SECTIONS SHOWN IN THE UNITED
STATES GEOLOGICAL SURVEY BULLETIN 729.

RIO BLANGO COUNTY, COLORADO

LOGATION

SECTION 19, TOWNSHIP | NORTH, RANGE 99 WEST OF THE 6th
SECTION 24, TOWNSHIP | NORTH, RANGE 100 WEST OF THE 6th PM.

TOTAL LENGTH OF SECTION...674.8 FEET

48.7 FT. OF ESTIMATED PLUS IS GALLON SHALE. 13.0 FT. OF ESTIMATED PLUS 3O GALLON SHALE

TOTAL LENGTH ASSAYED 5 FEET

BEST CONTINUOUS ASSAY 5 FEET OF 33.6 GAL. SHALE

LOGATION “F*

SECTIONS 10, 14, and 15, TOWNSHIP 2 NORTH, RANGE 98 WEST OF THE
6th PRINCIPAL MERIDIAN

TOTAL LENGTH OF SECTION... 1667.1 FEET

21.0 FT. OF ESTIMATED PLUS IS GALLON SHALE.........0.0 FT. OF ESTIMATED PLUS 30 GALLON SHALE
TOTAL LENGTH ASSAYED I7.5 FEET

BEST ESTIMATED CONTINUOUS SHALE 5 FEET OF 25 GAL. SHALE

LOCATION “y"

SECTION 36, TOWNSHIP | NORTH, RANGE 96 WEST OF THE
6th PRINCIPAL MERIDIAN

TOTAL LENGTH OF SECTION... 1166.8 FEET

18.0 FT. OF ESTIMATED PLUS IS GALLON SHALE........ 0.0 FT. OF ESTIMATED PLUS 30 GALLON SHALE
TOTAL LENGTH ASSAYED 8.0 FEET

BEST CONTINUOUS ASSAY 3.7 FEET OF 12.6 GAL. SHALE

(BEST CONTINUOUS SHALE SAMPLED

TONS PER

uanere — [eattons ran rom

02,000
7,973,000

THE OIL CONTENT SHOWN IN THE ABOVE PARTIALLY SAMPLED SECTIONS IS
NOT CONSIDERED TO BE REPRESENTATIVE OF THE TRUE OIL SHALE CONTENT,
BUT 18 SHOWN BECAUSE THIS DATA HAS BEEN USED FOR AN AREA WHERE
OTHER DATA WAS UNAVAILABLE IN THE MAKING OF PLATES 3, 48 AND 49,

Figure 8A,





FEET ABOVE MAHOGANY MARKER

BATTLEMENT MESA HOLE
PURE OIL COMPANY

OIL YIELDS OF OIL-SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE
CREEK MEMBERS OF THE GREEN RIVER FORMATION ON THE NORTH SIDE OF
BATTLEMENT MESA NEAR BEAVER CREEK (SW NW, SECTION 36, TOWNSHIP 7

SOUTH, RANGE 94 WEST OF THE 6THPM.) AS ASSAYED BY PAUL S. NICE.

GALLONS PER.TON

82FT. OF PLUS IS GALLON SHALE. oe

GARFIELD COUNTY, COLORADO

GALLONS PER TON
10 80 30 40 60 40

"sunrace,
Et ease

300
20
290
10
200
MAWORANY MARKER oy
tere"
270
10
20
200
30
240
40
230
80
220
oy
210
«7
i200
= 00
<
190
= 90
180 >
z
2 100
170 3
HN
160 z
=

2 3
3 8

FEET ABOVE MAHOGANY MARKER
8

TOTAL LENGTH OF SEGTION- 825 FEET

GALLONS PER TOM
© 10 80 30 40 6000

3

FEET BELOW
as
g 3

8 FT. OF PLUS 30 GALLON

SHALE

SELECTED SEOTIONS
ce aow ven ron | sath ta | HRMS
9 Ft. 17,480 000 10,359,000
‘51 Ft. 107,220,000 38,650,000
556 Ft. 1,283,945,000 | 341,160,000

CORE SAMPLES DRILLED IN 1923

Figure 45.



mannan

HOLE F

DRILLED BY THE BUREAU OF MINES

ON NAVAL OIL SHALE RESERVE No. !

OIL YIELDS OF OIL SHALE BEDS IN THE EVAGUATION GREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION ON THE NORTH SIDE OF TRAPPER'S CREEK
(NE, SE.SE., SECTION 6, TOWNSHIP 5 SOUTH, RANGE 94 WEST OF THE 6th P.M) AS
INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE BUREAU OF MINES.

GARFIELD GOUNTY, COLORADO

wanoeany

avove

TOTAL LENGTH OF SECTION...786 FEET

105 FT. OF PLUS 15 GALLON SHALE

rom ations ran

On

‘80 60 70 of 10 20 80 40 60 0 70 a4

PROT AOVE ManceamyY WAR

erLow wanoeany

3@ FT.OF PLUS 30 GALLON SHALE

SELECTED SECTIONS

tamer] row [ro Teatsone ran tow | cums ares
30.80 135,099,000
28.47 212,740,000
14.99 1,073,488,000
rest) 1,877,081,000,

CORE SAMPLES ORILLED IN 1949

Figure 14.



SECTION F-F

HORIZONTAL SCALE VERTICAL SCALE
es ms 00 reer 2000 reer
<
3 : :
z &
¢ 3
: z £
x 6 =
s $ 3 8
g « Pa 3 3°
§ 3 Fo Fy Bu
z 3 ry 3
z 8 § 6s ge
3 3 Fa
« 8 3 4
: é a 8 ° §
z 2 z 2
8 ¢ s
x < fe =
o ivf $s ¢ “|
Fe g EL. 8000 FT.
§ F-
§
=
Fa «
z 5
® 8
LEGEND. : iT EL. 7000 FT.
ZONE OF 28 GALLON SHALE
(193) BARRELS OF OIL PER SQUARE MILE IN MILLIONS
‘8a,
AVERAGE WEIGHTED OIL CONTENT ZONE OF 18 GALLON SHALE
- (334) BARRELS OF OIL PER SQUARE MILE IN MILLIONS
feenern] — wiuiione oF sannece,
mou | ro | ww PER SOUARE MILE
mies
fee once swate | oat. ovate MAHOGANY MARKER
rt |nouealere| 124.4 371.0 ‘oat
——— PROBABLE LIMIT OF 18 GALLON SHALE
EL. 6000 FT.

TRUE SECTION

HORIZONTAL SCALE
Suis 0 MILES.

Figure 7.


BEAR RUN HOLE
SUN OIL COMPANY

OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION GREEK AND PARACHUTE GREEK
MEMBERS OF THE GREEN RIVER FORMATION NEAR THE HEAD OF BEAR RUN GULCH
(NW NW, SECTION 25, TOWNSHIP 5 SOUTH, RANGE 97 WEST OF THE 6TH P.M.)

GARFIELD COUNTY, COLORADO

estos pen tow enuiowe ren row caLions PER Tom
own wwe we © 10 n0 30 40 80 00 70 0 aerrrrrir
00 ”

eo 0 Eo
i

wo “0 «
i

. 0 He

«wo 380 240

00 we Ae

00 x00 A

oro 0 v0

ay _ USHA 0

Sate Sm °

Soo Sao »

> 2

m0 0 0

Fa = mo «

3 oe 30 <0

mo Jao <0

a0 . i

: : 2

3 :

8 ato 2 woo >

a 0 pr

. . 3

S00 So S00

: 2

oo vr

“0 "0

© "0

‘= o

“0 10

“0 0

00 110

0 100

sro * '
ae TTT |

TOTAL LENGTH OF SECTION~ 63! FEET
341 FT. OF PLUS I5 GALLON SHALE . 47 FT OF PLUS 30 GALLON SHALE

SELECTED SECTIONS
tavern [row [vo [estiows en von] acts it, | SaunE ane
7et|-20 t|-5e fF 147,979,000

1265 tt. | + 40 ft. 6.5, 245,971,000

499 ft.] +308 f1.]-191 ft. 1,019,262;000

CORE SAMPLES DRILLED IN 1948

wre 2B.



TABLE 3. - 15-gallon shale diamond-drill holes

|Thickness, | Oil, gal. | Gal, square} Tons per Barrels of oil
Hole feet per ton foot column} square mile |per square mile
Aecccccccnce 460.0 15.06 523.020 | 966,405,0007 346,453,000
423.0 15.00 479 6259 885,745,000! 315,623,000
475.0 14.96 556.750 998, 354,000} ~355,604,000
700.0 15.79" 823.800 |1,463,134,000} 550,069,000
820.0 15.03 930.537 |1,725,617,000| 617,524,000
510.0 14.99 577-177 |1,073,458,000! 385,122,000
60.0 15.55° 70.120 | 125,732,000] 46,551,000
718.0 15.03 814.616 |1,510,954,000! 540,706,000
510.0 15-06 614.044. |1,136,075,000} 407,365,000
70.0" 15.18 (80.143 | 147,114,000} . 53,174,000
515.0 15.03 652.717 |2,209,950,000] . 452,989,000
430.0 152,00 487,046.| 905,128,000} 323,260,000
449.0 18.55 665.220 |1,019,262,000} 450,174,000
483.3 15.66 568.447 }1,011,791,000} 377,254,000
1,111.6 15.01 1,255.664 | 2, 339,723,000) : 836,172,000
504.0 15.03 511.996 11,060, 606,000] 379,545,000
502.0 15.00, | 568.904 |1,056,703,000} . 377,394,000
464.0 15.05 | 527 165 976,302,000] 349,842,000
460.5 15.43 534 439 965,875,000] 354, 44,000
388 15.17 4h | 851 &15,585,000] - -294, 582,000
Sys Qocccece 430 15.09 409.6556 | 904,487,000} -324,969,000
BeCe Leceves 479.0 15.09 . 1,007 553,000 . 361,999,000
J.BM. 6 376.0 18.18 710,670,000! 433,590,000
LeVe Dee 536.0 15.23 1,126, 092,000] .: 468,342,000
LiVe L3sceee| 53720 15.29 1,127, 681,000 | . .42.05,530,000
Total.scecees/12, 501.4 14-,500.90L _ 7
Averagesseee| 500.1 15.42 | 1.160 [1,049,008,000! 385,136,000
All diamomd-drill holes except marginal holes-G and J
Totalscesese Lo, 3/14 | 15, 350.038 |
Averages sees 537.9 | 15k 1.160 !1,128,295,000} 414,245,000
General Petroleum wells
2B-19-Goeese| 680.0 15.00 | 7704K0 71,431,501,000[ 511,200,000
24-1L2-G. 690.0 15.00 | 7€L.770 {1,452,409,000} 518,718,000
66-5-Goe 2,070.0 19.05 2,877-300 | 4,211,,551,00011,910, 339,000
8lL-15-G. 1,310.0 15.15 1,548.420 | 2,745,880, 000.1, 029,705,000
Total..scooee| 4,750.0 599712530 '
Averagesseee| 1,18765 16.95 1.259 | 2,459,237,000' 992,478,000
All holes
Total secevee [L],201-4 20, 478.431 | 7 °
Average. 594.9 15.83 1.167 |1,243,628,000! - 468,729,000

All noles minus marginal holes G and J

Totale.csess|lf,1ol-4

30, FU .108 |
15.85

1.187 _|1, 325,562,000

Averageseseo| 634.1.
4025

-l2-

» +499 5611, 000




Many of the analytical data were determined at the Bureau of Mines
Petroleum and Oil-Shale Experiment Station, Laramie, Wyo., and special thanks
are due to H. M. Thorne and K. W. Staniield.

The valuable aid of D. C. Duncan and N, M. Denson of the U. S. Geological
Survey for their help in identifying markers, especially in the Piceance area,
is greatly appreciated.

The author is indebted to E, D, Gardner, Chief Mining Ingineer, Bureau
of Mines; Tell Ertl, formerly mining engineer in charge of the Bureau of Mines
0il-Shale Dancnstration Mine; Virgil S. Nidiffer, engineering aid; and H. R.
Garrett and R. G Cooper, draftsmen, for their aid in making this report
possible.

GEOLOGY

The Green River formation was laid dow as sediments in the bottams of
broad, shallow bodies of water during middle Eocene time. One of these lakes,
known as Uinta Lake, covered northwestern Colorado and east-central Utah.

A similar lake, mown as Gosuite Luke, covered southwestern Wyaning. These
two lakes were bounded by high hills, the drainage was to the south, and at
times the lakes may have been connected.

In Colorado, the extreme fringes of the upper part of the Green River
formation, wlth the exceptio of portions north of the White River and on
Grand Mesa, have been eroded away. In the Parachute Creek area, the Green
River formation is about 3,000 fect thi 2/ and has been divided into the
following manbers:

Member Thickness, feet Characteristics
Evaculation Creek 1,000 Fine gray and brown sandstones with

| interbedded gray marlstones and a

1 few thin beds of oll shale,
Parachute Creek JOO to 1,300 Black, brown, and gray marlstmme,
including the principal oil-shale
units, a few thin altered tuff,
analcite, and chert beds; sandstone
tongues near base,

Garden Gulch 630 to 720 Grey marlstone, with sane gray and
brown shale and a few thin oil-shale
beds.

Douglas Creek 430 to k70 Brown sandstone and gray shale with a

few thin oil-shale beds.

1

The Green River formation overlies confommably the Wasatch formation of
the lower Eocene and in places is overlain by the Bridger formation of the
middle and upper Eocene or by lava flows.

2/ Dancen, D. C., and Denson, N. M,, Geology of Naval Oil-Shale Reseryes 1 and
3, Garfield County, Coloe: U.S. Geol. Surv. Oil and Gas Investigations
Preliminary Map 94, 1949.

4085 -2-


AKOLT No.3
STANDARD OIL COMPANY
OF CALIFORNIA
OIL YIELDS OF OIL SHALE BEDS IN THE PARACHUTE CREEK MEMBER OF THE GREEN
RIVER FORMATION BETWEEN CLEAR CREEK AND GONN GREEK ( SW. SW. SW., SECTION
24, TOWNSHIP 6 SOUTH, RANGE 96 WEST OF THE 6th P.M.)

GARFIELD COUNTY, COLORADO

SATE Tae oT wo
sunrnoe cree ne
00 0
aa wo
sco
- we
sso
we 0
eo .
a0) 10
we :
Parry
so
soe . .
. = m0 =
Taso : :
« <0 2
i , i”
» oe : .”
See bd 3%
° = 1° <
: 50 < °
2 * wo .
00 Sw
. tv :
5 we
° Taso
: 2
5 sro
= 0
I ww °
wo
ws peer
as =
a °
“ i
are Ew
= i
seo _
i 3
we Zw
0
we =
wwe :
a0
sorrow arise
Lovern To /eaLLowe PER Tow souene ve
‘T2 FT. ~45 FT 27.37 137,880,000
eT FT 760 FT. ‘25.47 168,246,000
dea Fe [caer et [er FE esoe,000

OORE SAMPLES DRILLED IN I

Figure Ws,







HOLE E

DRILLED BY THE BUREAU OF MINES

ON NAVAL OIL SHALE RESERVE No.!
OIL YIELDS OF OIL SHALE BEDS IN THE EVACUATION CREEK AND PARACHUTE CREEK
MEMBERS OF THE GREEN RIVER FORMATION AT THE JUNCTION OF THE TWO MAIN FORKS.
OF CORRAL GREEK (SW. SW. NW., SECTION 2, TOWNSHIP 5 SOUTH, RANGE 95 WEST OF THE
6th P.M) AS INDICATED BY THE FISCHER METHOD AT THE LARAMIE STATION OF THE
BUREAU OF MINES.

GARFIELD COUNTY, COLORADO

JALLONG PER TOW CALLowe ran Tom
ito 30 49 80 6079 00 130 40 80 6c
00
: ero “0
woo < t00 70
no 00 ot
a0 z oo
00
: n0
i

: a0
a0 : os
aso . eo
: ¥ sro
< wo
:
a80
400
> 440
Fao
Jas
; io
ao

aro

TOTAL LENGTH OF SECTION...I936 FEET

444 FT. OF PLUS IS GALLON SHALE. . 60 FT. OF PLUS 30 GALLON SHALE

SELECTED SECTIONS
To [eactowe ren tow
=7r FTA
Tor 28.28
oy 18. 03
ost 10, 98

wanes oF on
pun eouane Mite

20 FT
i936 et,

CORE SAMPLES DRILLED IN I

Figure 18.