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TRANSCRIPT
Chevron
\^0 Chevron Oil Field Research Company A Chevron Corporation Subsidiary 1300 Beach Boulevard, La Habra, California Mail Address: PO. Box 446, La Habra, CA 90633-0446
October 13, 1987
TRANSMITTAL OF GEOCHEMICAL RESULTS TAR SAND TRIANGLE, CIRCLE CLIFFS, AND SAN RAFAEL SWELL OUTCROP SAMPLES
Cynthia Brandt Utah Geological and Mineral Survey 606 Black Hawk Way Salt Lake City, UT 84108-1280
Dear Cynthia:
Geochemical evaluation ofrheavy oil from twelve selected outcrop samples collected by UGMS geologists is complete. Four samples each from the Tar Sand Triangle, Circle Cliffs, and San Rafael Swell were included in this study. Extracts from the White Rim Sandstone host rock (Permian) and Moenkopi Formation (Triassic) were analyzed for weight percent extract, sulfur concentration, stable carbon isotope ratio and capillary chromatography. One sample extract from each of these three areas was separated into saturate, aromatic, NSO and asphaltene compounds. These same three samples were also analyzed for porphyrin content. These three samples were further studied to determine the Programmed-Pyrolysis Gas-Chromatography (PPGC) fingerprint of the asphaltene fraction and the Gas-Chromatography Mass-Selective-Detection (GCMSD) fingerprint of the saturate fraction. These data are summarized in Tables 1 and 2 and on the attached plots. An explanation of Table 2 is provided. Weyask that all information herein remain confidential for at least two years.
Remaining outcrop samples are being returned at your request in a separate shipment. Samples have been bagged and labeled according to Chevron sa'mple handling procedures. Each sample is labeled with Chevron's "CRC" number and with the UGMS number assigned by the field geologist. If possible, please store these samples such that we can retrieve them should further analyses be necessary.
If you have any questions regarding these results, or wish to discuss broader aspects of tar sand geology or geochemistry, please call either myself, at (213) 694-9461, or, after October 23, Steve Jacobson at (213) 694-7505.
Cynthia Brandt - 2 - 10-13-87
We are grateful for access to these fine samples. I especially appreciate the help of Charlie Bishop, Bryce Tripp, and Mike Laine during my visit to Salt Lake City.
Sincerely,
S. T. Phillips
Attach: Tables 1-2 Explanations for Table 2
i;
TABLE 1
CRC #
46,930 46,932 46,935 46,936
46,927 46,410 46,922 46,923
46,409 46,918 46,920 46,919
Sample ID. #
1 1 1 1
1 1 1 1
1 3 1 1
UGMS
UGMS UGMS UGMS UGMS
UGMS UGMS UGMS UGMS
UGMS UGMS UGMS UGMS
Sample #
#RP-1 #BL-4A #RC-2 #RC-3B
#E-27 #E-45 #2 #20
#73-4B #21 #18 #14
Collection Area Twn.
Tar Sand Triangle, Outcrop Samples
Red Point 32S Black Ledge 32S Red Cove 32S Red Cove 30|S
Circle Cliffs, Outcrop Saaples
East Side 35S East Side 34S West Side 35S West Side 34S
San Rafael Swell, Outcrop Saaples
Black Dragon 21S Black Dragon 2IS Black Dragon 2IS Black Dragon 21S
Rng.
16E 16E 17E 17E
8E 8E 7E 7E
13E 13E 13E 13E
Sec.
18 8 7 10
6 21 25 29
35 10 26 16
Formation
White Rim SS it
it
it
Moenkopi it
it
it
Moenkopi (Black Dragon Member)
Aee
Permian ii
ii
it
Triassic ii
n it
Triassic it,
ii
ii
TABLE 2
(See following pages for explanation)
CRC #
46,930 46,932 46,935 46,936
46,927 46,410 46,922 46,923
46,409 46,918 46,920 46,919
Sample ID. #
1 1 1 1
1 1 1 1
1 3 1 1
Extract wt.%
0.38 2.88 0.03 0.74
0.20 3.66 0.76 2.27
0.13 1.10 1.31 0.44
Sulfur vt.X
3.08 3.87 2.18 3.08
3.58 4.07 5.29 3.21
3.14 2.51 4.25 3.65
613C •VnnPDB
-29.8 -29.9 -29.4 *-• -29.6
-30.3 -30.5 -30.1 -30.3
-29.8 -29.5 -30.3 -30.1
pr/ph ' F-SCOT % Sat. % Aro. % NS0
Tar Sand Triangle, Outcrop Saaples
18.7 3.4 28.8
0.41
Circle Cliffs, Outcrop Saaples
9.1 2.8 36.1 6.6 3.9 45.7
0.28
San Rafael Swell, Outcrop Saaples
1.27 17.3 2.7 65.1 25.9 1.6 40.0
% Asph.
45.5
44.0 25.8
10.9 21.1
PPGC Asph.
ft
ft
ft
GCMSD Sat.
*
'ft .
*
GCMSD Aro.
UV Porph.
ft
* ft
ft ft
HPLC Porph.
ft
ft ft
ft ft
* = Analysis performed.
EXPLANATIONS FOR TABLE 2
DEFINITIONS OF ANALYSIS CATEGORIES, COMMENTS ON RESULTS
Extract wt%: Proportion of whole-rock sample removed in solution with dichloromethane. F-SCOT chromatography performed on all extracts.
Sulfur wt%: Proportion of sulfur in extract as determined by combustion.
1 3 C
6 1 3 C % P D B = [ ! i ^ | standard ~ " x 1 0 0°
Ratio of stable carbon isotopes in whole extract.
Pr/Ph: Ratio of pristane to phytane as determined from F-SCOT chromatograms.
% Sat: Proportion by weight of extract, soluble in hexane, comprising hydrocarbons saturated with respect to hydrogen.
% Aro: Proportion by weight of .extract, soluble in hexane, comprising aromatic hydrocarbons (unsaturated).
% NSO: Proportion by weight of extract, soluble in hexane, comprising nonhydrocarbon species containing heteroatoms (nitrogen, sulfur, oxygen).
% Asph: Proportion by weight of extract that precipitates in hexane. Asphaltenes are large, complex, highly aromatic materials containing NSO compounds and" are/similar to kerogen.
PPGC Asph: Programmed Pyrolysis - Gas Chromatography of asphaltene fraction.
GCMSD Sat: Gas Chromatography *=- Mass Selective Detection of saturate fraction. Important biomarker compounds analyzed by monitoring m/z 191 (triterpanes) and m/z 217 (steranes) fragmentation patterns.
GCMSD Aro: Gas Chromatography - Mass Selective Detection of aromatic fraction. Important biomarker compounds analyzed by monitoring m/z 231 (triaromatic steranes) and m/z 253 (monoaromatic steranes) fragmentation patterns.
UV Porph: Ultraviolet spectroscopy of porphyrins. Determines relative abundance of nickel and vanadyl porphyrin complexes. All samples contain predominantly vanadylporphy-rins.
HPLC Porph: High Performance Liquid Chromatography of
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