Variations in organic geochemistry and petrography with depth of burial, Green River formation oil shales Piceance Creek Basin, Colorado
Chemical analysis, /sup 13/C NMR, and IR spectroscopy were used to characterize organic matter concentrates (HC1/HF dissolution) and carbonate mineral-free (HC1 dissolution) oil shale samples from a 213 m (700 ft) interval between the top of the Mahogany Zone and the base of the R4 zone, C-a Tract, Colorado. The H/C, O/C, and N/C ratios and the fraction of aliphathic C of the organic matter decrease with depth. The aliphatic/aromatic ratio also with depth. Organic petrography data, both qualitative and quantitative, were obtained by reflected white-light and reflected blue-light fluorescence microscopy. Qualitative petrographic parameters, such as overall fluorescence color, show regular and systematic trends with depth. Vitrinite reflectance increases slightly with depth. The observed chemical and petrographic variations are consistent with increasing thermal maturation with depth.
- Research Organization:
- Production Research Division, Gulf Research and Development Co., Houston, TX
- OSTI ID:
- 6075676
- Report Number(s):
- CONF-8404121-
- Journal Information:
- Oil Shale Symp. Proc.; (United States), Conference: 17. oil shale symposium, Golden, CO, USA, 16 Apr 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GREEN RIVER FORMATION
GEOCHEMISTRY
PETROGRAPHY
PICEANCE CREEK BASIN
ABSORPTION SPECTROSCOPY
CHEMICAL ANALYSIS
COLORADO
NUCLEAR MAGNETIC RESONANCE
OIL SHALES
ORGANIC MATTER
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMISTRY
ENERGY SOURCES
FEDERAL REGION VIII
FOSSIL FUELS
FUELS
GEOLOGIC FORMATIONS
MAGNETIC RESONANCE
MATERIALS
NORTH AMERICA
RESONANCE
SPECTROSCOPY
USA
040201* - Oil Shales & Tar Sands- Site Geology- (-1989)
040500 - Oil Shales & Tar Sands- Properties & Composition