Relationship between bitumen maturity and organic facies in Devonian shales from the Appalachian basin
Variation in several bitumen maturity parameters was studied in a core of Devonian shale from the central Appalachian basin. Kerogens in the shales are at maturity levels equivalent to the early stages of oil generation and range in composition from Type III-IV to Type II-III. Maturity parameters based on steranes, terpanes, and n-alkanes exhibit fluctuations that are unrelated to thermal maturity changes in the core. The parameters correlate with one another to a high degree and appear to be directly or indirectly related to the organic facies of the shales. The maturity level indicated by each parameter increases with total organic carbon (TOC) content and hydrogen index value. The greatest variation occurs in rocks with TOC values below 2% and hydrogen index values below 250. The data provide a good opportunity to examine the dependency of bitumen maturity on organic facies, and they highlight a caveat to be considered during interpretation.
- OSTI ID:
- 6683946
- Report Number(s):
- CONF-880301-
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrocarbon source potential of organic facies of lacustrine Elko formation (Eocene-Oligocene), northeastern Nevada
Internal stratigraphy and organic facies of the Devonian-Mississippian Chattanooga Shale in Kansas and Oklahoma
Related Subjects
040100 -- Oil Shales & Tar Sands-- Reserves & Exploration-- (-1989)
040500* -- Oil Shales & Tar Sands-- Properties & Composition
APPALACHIA
BITUMENS
BITUMINOUS MATERIALS
BLACK SHALES
CARBONACEOUS MATERIALS
CHATTANOOGA FORMATION
CHEMICAL COMPOSITION
CHEMISTRY
COMPARATIVE EVALUATIONS
ENERGY SOURCES
EXPLORATION
FOSSIL FUELS
FUELS
GEOCHEMISTRY
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
KEROGEN
MATERIALS
MATURATION
MINERAL RESOURCES
NORTH AMERICA
OIL SHALE DEPOSITS
OIL SHALES
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
RESOURCES
TAR
USA