Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska
Journal Article
·
· Am. Assoc. Pet. Geol. Bull.; (United States)
OSTI ID:7055971
- Geological Survey, Denver, CO
Two types of natural gas occurrences are present in the Cook Inlet basin. The major reserves (1.8 x 10/sup 11/m/sup 3/) occur in shallow (less than 2300 m), nonassociated dry gas fields that contain methane with ..delta.. /sup 13/C in the range of -63 t -56 per mil. These gas fields are in sandstones interbedded with coals of the Sterling and Beluga Formations; the gas fields are interpreted as biogenic in origin. Lesser reserves (1.1 x 10/sup 10/ m/sup 3/) of natural gas are associated with oil in the deeper Hemlock Conglomerate at the base of the Tertiary section; associated gas contains methane with ..delta.. /sup 13/C of about -46 per mil. The gases associated with oil in the Hemlock Conglomerate are thermogenic in origin.
- OSTI ID:
- 7055971
- Journal Information:
- Am. Assoc. Pet. Geol. Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol. Bull.; (United States) Vol. 64:8; ISSN AAPGB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
030200* -- Natural Gas-- Reserves
Geology
& Exploration
ALASKA
ALKANES
CARBON 13
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CENOZOIC ERA
COAL
CONGLOMERATES
DIAGENESIS
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GULF OF ALASKA
HYDROCARBONS
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MATERIALS
METHANE
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
NUCLEI
ORGANIC COMPOUNDS
PACIFIC NORTHWEST REGION
PACIFIC OCEAN
RESOURCES
ROCKS
SANDSTONES
SEAS
SEDIMENTARY ROCKS
STABLE ISOTOPES
SURFACE WATERS
TERTIARY PERIOD
USA
030200* -- Natural Gas-- Reserves
Geology
& Exploration
ALASKA
ALKANES
CARBON 13
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CENOZOIC ERA
COAL
CONGLOMERATES
DIAGENESIS
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GULF OF ALASKA
HYDROCARBONS
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MATERIALS
METHANE
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
NUCLEI
ORGANIC COMPOUNDS
PACIFIC NORTHWEST REGION
PACIFIC OCEAN
RESOURCES
ROCKS
SANDSTONES
SEAS
SEDIMENTARY ROCKS
STABLE ISOTOPES
SURFACE WATERS
TERTIARY PERIOD
USA