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Depositional setting and diagenetic evolution of some Tertiary unconventional reservoir rocks, Uinta basin, Utah

Journal Article · · Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:6355003
; ;
The Douglas Creek Member of the Tertiary Green River Formation underlies much fo the Uinta basin, Utah, and contains large volumes of oil and gas trapped in a complex of fractured low-permeability sandstone reservoirs. In the southeastern part of the basin at Pariette Bench, the Eocene Douglas Creek Member is a thick sequence of fine-grained alluvial sandstone complexly intercalated with lacustrine claystone and carbonate rock. Sediments were deposited in a subsiding intermontane basin along the shallow fluctuating margin of ancient Lake Uinta. although the Uinta bsin has undergone postdepositional uplift and erosion, the deepest cored rocks at Pariette Bench have never been buried more than 9800 ft (3000 m). The sandstones, dominantly lithic arkoses and feld-spathic litharenites, were derived from source terranes south of the Uinta basin. Kerogenous rocks at Pariette Bench are thermochemically immature and therfore are not the source of oil produced in the field. Hydrocarbons are compositionally similar to some of the oils produced from the Green River Formation in the Bluebell-Altamont field and are interpreted to have migrated from mature Green River source rocks through a network of open fractures. The occurrence of small amounts of hydrocarbon in secondary pores indicates that is emplacement postdated carbonate dissolution. (JMT)
Research Organization:
Geological Survey, Denver, CO
OSTI ID:
6355003
Journal Information:
Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 66:10; ISSN AAPGB
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CARBONATE ROCKS
CENOZOIC ERA
DEPOSITION
DIAGENESIS
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MATURATION
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
OIL FIELDS
ORIGIN
PERMEABILITY
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SOURCE ROCKS
TERTIARY PERIOD
USA
UTAH