Organic geochemistry and comparative diagenesis: Miocene Monterey Formation, Lost Hills oil field and vicinity, West San Joaquin Basin, California
Thesis/Dissertation
·
OSTI ID:7013615
Because of the geologic structure, the Monterey in the subsurface near Lost Hills in the San Joaquin Basin forms a natural laboratory for the study of the diagenetic responses of biogenic sediment. Rocks of similar age and lithology are buried to depths ranging between 500 and 3500 m, and are thus exposed to a temperature range of 45-130/sup 0/C. Silica phases exhibit a clear diagenetic progression with depth from the opal-A of the diatom frustules to opal-CT and ultimately to microquartz. Biomarker geochemistry provides effective alternative maturity indicators. Of particular interest are the stereochemical variations observed in the assemblages of steranes and triterpanes extracted from oil well core samples. Samples from petroleum production zones are distinguished by anomalously mature biomarker assemblages considering their depth of burial. It appears that any immature indigenous bitumen in production zone samples is overwhelmed by a mature component, which presumably migrated updip from deeper, warmer strata. While both source and reservoir rock are lithologically similar and lie within the same formation, biomarker geochemistry indicates that substantial generation occurs only in deeply buried Monterey shales.
- Research Organization:
- California Univ., Berkeley (USA)
- OSTI ID:
- 7013615
- Country of Publication:
- United States
- Language:
- English
Similar Records
Seismic expressions of Monterey Formation diagenesis: examples from offshore California
Implications from a study of the timing of oil entrapment in Monterey siliceous shales, Lost Hills, San Joaquin Valley, California
Tectonic, depositional, and diagenetic history of Monterey Formation (Miocene), central San Joaquin Basin, California
Conference
·
Mon Feb 29 23:00:00 EST 1988
· AAPG Bull.; (United States)
·
OSTI ID:6634761
Implications from a study of the timing of oil entrapment in Monterey siliceous shales, Lost Hills, San Joaquin Valley, California
Conference
·
Tue Dec 31 23:00:00 EST 1991
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5699460
Tectonic, depositional, and diagenetic history of Monterey Formation (Miocene), central San Joaquin Basin, California
Journal Article
·
Thu Feb 28 23:00:00 EST 1985
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:5290502
Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BITUMENS
CALIFORNIA
CHALCOGENIDES
CHEMISTRY
DIAGENESIS
ENERGY SOURCES
FEDERAL REGION IX
FOSSIL FUELS
FUELS
GEOCHEMISTRY
GEOLOGIC DEPOSITS
HYDROCARBONS
MATURATION
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OPALS
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DEPOSITS
QUARTZ
RESERVOIR ROCK
RESOURCES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOURCE ROCKS
TAR
USA
020200* -- Petroleum-- Reserves
Geology
& Exploration
BITUMENS
CALIFORNIA
CHALCOGENIDES
CHEMISTRY
DIAGENESIS
ENERGY SOURCES
FEDERAL REGION IX
FOSSIL FUELS
FUELS
GEOCHEMISTRY
GEOLOGIC DEPOSITS
HYDROCARBONS
MATURATION
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OPALS
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DEPOSITS
QUARTZ
RESERVOIR ROCK
RESOURCES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOURCE ROCKS
TAR
USA