Altamont-Bluebell: a major, naturally fractured stratigraphic trap, Uinta Basin, Utah
The Altamont-Bluebell trend is composed of a highly overpressured series of oil accumulations in naturally fractured, low-porosity, Tertiary lacustrine sandstones. Postdepositional shift of the structural axis of the basin in late Tertiary time produced a regional updip pinchout of northerly derived sandstones into a lacustrine oil-shale sequence. Facies shifts during the deposition of more than 15,000 ft (4,570 m) of lacustrine sediments have resulted in a changing pattern of reservoir distribution and hydrocarbon charge at various stratigraphic levels. Reservoir performance is significantly enhanced by vertical fractures and initial fluid-pressure gradients, some of which exceed 0.8 psi/ft. The crude has a high paraffin content resulting in pour points above 100/sup 0/F (37.78/sup 0/C), gravities of 30/sup 0/ to 50/sup 0/ API, and an average GOR of 1,000 cu ft/bbl. The ultimate recovery of the field could be more than 250 million bbl.
- Research Organization:
- Shell Oil Co
- OSTI ID:
- 6562877
- Journal Information:
- Mem. - Am. Assoc. Pet. Geol.; (United States), Journal Name: Mem. - Am. Assoc. Pet. Geol.; (United States) Vol. 24; ISSN MAPGA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Depositional setting and diagenetic evolution of some Tertiary unconventional reservoir rocks, Uinta basin, Utah
Open fracture prediction and detection at the Bluebell-Altamont field, Uinta Basin, Utah
Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKANES
COMMINUTION
ENHANCED RECOVERY
FEDERAL REGION VIII
FRACTURED RESERVOIRS
FRACTURING
GEOLOGIC DEPOSITS
GEOLOGY
HYDROCARBONS
MINERAL RESOURCES
NORTH AMERICA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PARAFFIN
PETROLEUM DEPOSITS
PRESSURE GRADIENTS
PRODUCTION
PRODUCTIVITY
RECOVERY
RESERVOIR ROCK
RESOURCE POTENTIAL
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
STRATIGRAPHY
USA
UTAH
WAXES