Analysis of gases in the earth's crust. Final report, January 1982-May 1988
891 crustal gas samples have been collected for chemical analysis and stable isotopic measurements of carbon, hydrogen, nitrogen, sulfur and helium. 607 samples were collected from oil and gas fields. The remainder were obtained from canned drill cuttings, surface seeps, coalbed gas desorption wells, deep-sea sediments, soils, and geothermal wells. Models which assume that oil and gas are generated from sedimentary organic matter appear suitable for old, tectonically-stable basins such as the Appalachian basin and for younger basins bordering passive continental margins such as the Gulf Coast. In relatively young, tectonically-active basins such as the Sacramento, however, significant amounts of gas may be generated from shallow sedimentary rocks pyrolyzed by igneous intrusives, deeply-subducted metasedimentary rocks, and other deep-earth sources. Apart from the issue of deep-earth gas, studies conducted during the contract have improved geochemical models for hydrocarbon exploration by: augmenting the understanding of the origin and distribution of microbial gases, introducing parameters for more effective recognition of microbial and thermogenic gas mixtures, providing detailed documentation on the origin and migration of natural gas in a number of tectonically-distinct sedimentary basins, and documenting a novel instance of reservoir alteration by bacteria.
- Research Organization:
- Global Geochemistry Corp., Canoga Park, CA (USA)
- OSTI ID:
- 6422716
- Report Number(s):
- PB-91-104273/XAB; CNN: GRI-5081-360-0533
- Resource Relation:
- Other Information: See also PB--88-141619
- Country of Publication:
- United States
- Language:
- English
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02 PETROLEUM
01 COAL, LIGNITE, AND PEAT
15 GEOTHERMAL ENERGY
58 GEOSCIENCES
COAL DEPOSITS
GAS ANALYSIS
CONTINENTAL CRUST
GEOTHERMAL RESOURCES
NATURAL GAS
ORIGIN
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
APPALACHIAN BASIN
BIODEGRADATION
CALIFORNIA
CARBON DIOXIDE
CARBON ISOTOPES
COAL SEAMS
DISTRIBUTION
DRILL CORES
ENVIRONMENTAL TRANSPORT
EXPLORATION
GEOCHEMISTRY
GEOLOGIC MODELS
GEOTHERMAL WELLS
GULF COAST
HELIUM ISOTOPES
HYDROGEN ISOTOPES
HYDROGEN SULFIDES
ISOTOPE RATIO
KANSAS
NITROGEN ISOTOPES
ORGANIC MATTER
PROGRESS REPORT
PYROLYSIS
SAMPLING
SEA BED
SEDIMENTS
SEEPS
SOILS
SULFUR ISOTOPES
TEXAS
WEST COAST
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DOCUMENT TYPES
EARTH CRUST
ENERGY SOURCES
FEDERAL REGION IX
FEDERAL REGION VI
FEDERAL REGION VII
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
HYDROGEN COMPOUNDS
ISOTOPES
MASS TRANSFER
MINERAL RESOURCES
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
RESOURCES
SEDIMENTARY BASINS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
USA
WELLS
030200* - Natural Gas- Reserves
Geology
& Exploration
020200 - Petroleum- Reserves
Geology
& Exploration
011000 - Coal
Lignite
& Peat- Reserves
Geology
& Exploration
150302 - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys
580000 - Geosciences