Chemofossils in oils and rocks in the Bazhenovo Formation at the Salym field
No unambiguous explanation has so far been given for the origin of oil pools in the Bazhenovo formation, although most investigators consider that the Bazhenovo oil to be autochthonous, that is, due to thermal destruction of dispersed organic matter. However, some investigators assume an allochthonous origin for the pools, with the hydrocarbons migrating from older beds along faults. The model chosen governs the exploration strategy, so establishing the source is a matter of practical as well as theoretical importance. Chemofossils are widely used, including the n-alkanes, carboxylic acids, and aliphatic isoprenoids, in particular pristane C/sub 19/ and phytane C/sub 20/. The relict hydrocarbon distributions are affected not only by the composition of the initial organic matter but also by the deposition conditions (Eh and pH), stratal mineral compositions, and catagenesis, which is dependent mainly on the stratal temperatures. Here the authors not only compare these chemofossils in the Salym oils and rocks but also analyze the pristane and phytane distributions in relation to T/sub st/ and consequent thermal effects on the organic and mineral matter of the rock. The authors examined the relict hydrocarbons by chromatography and chromatography-mass spectroscopy. 13 references.
- OSTI ID:
- 6962094
- Journal Information:
- Int. Geol. Rev.; (United States), Journal Name: Int. Geol. Rev.; (United States) Vol. 29:9; ISSN IGREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
023000 -- Petroleum-- Properties & Composition
ALKANES
ASIA
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CATAGENESIS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
CORRELATIONS
DATA
DEPOSITION
DRILL CORES
EASTERN EUROPE
ENERGY SOURCES
ENVIRONMENTAL TRANSPORT
EUROPE
EXPLORATION
EXTRACTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
HEAT TREATMENTS
HYDROCARBONS
INFORMATION
KEROGEN
MASS SPECTROSCOPY
MASS TRANSFER
MATERIALS
MINERAL RESOURCES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC MATTER
ORIGIN
PETROLEUM
PETROLEUM DEPOSITS
RESOURCES
SEPARATION PROCESSES
SIBERIA
SOLVENT EXTRACTION
SOURCE ROCKS
SPECTROSCOPY
USSR