Programmed pyrolysis-gas chromatography of artificially matured Green River kerogen
Compositional changes in Green River kerogen during laboratory-simulated maturation by hydrous pyrolysis were studied by using programmed pyrolysis-gas chromatography (PP-GC) and Rock-Eval II pyrolysis. Hydrous pyrolysis of Green River marl up to 330/sup 0/C results in the thermal degradation of kerogen to form bitumen that is enriched in asphaltenes and resins. During this main stage of bitumen generation, the hydrogen index of the kerogen decreases slightly, n-alkane precursors are concentrated in the kerogen, and acyclic isoprenoids (especially prist-1-ene) are preferentially lost. At hydrous-pyrolysis temperatures above 330/sup 0/C, the hydrogen index and concentration of n-alkane precursors within the kerogen decrease. Several PP-GC parameters from the kerogens, such as the prist-1-ene(n-heptadecane + n-heptadec-1-ene) ratio, the phytane(n-octadecane + n-octadec-1-ene) ratio, and the odd-even predominance (OEP) of n-alkanes or n-alk-1-enes, show systematic changes with increasing maturity. However, the T/sub max/ of the Green River kerogen does not change significantly during thermal maturation.
- Research Organization:
- Chevron Oil Field Research Co., La Habra, CA (USA)
- OSTI ID:
- 5140463
- Journal Information:
- Energy Fuel; (United States), Journal Name: Energy Fuel; (United States) Vol. 2:1; ISSN ENFUE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
040500* -- Oil Shales & Tar Sands-- Properties & Composition
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA
DECOMPOSITION
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
GEOLOGIC FORMATIONS
GREEN RIVER FORMATION
INFORMATION
KEROGEN
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
PYROLYSIS
SEPARATION PROCESSES
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES
YIELDS