The Bluebell Oil Field, Uinta Basin, Duchesne and Uintah Counties, Utah

Download or read book The Bluebell Oil Field, Uinta Basin, Duchesne and Uintah Counties, Utah written by Craig D. Morgan and published by Utah Geological Survey. This book was released on 2003 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrocarbon production in the Bluebell field is from three reservoirs in the Tertiary-aged Colton and Green River Formations: (1) overpressured Colton/Flagstaff, (2) lower Green River, and (3) upper Green River. Kerogen-rich shale and marlstone deposited in marginal and nearshore openlacustrine environments are the source of the waxy crude in the Colton/Flagstaff and lower Green River. Marlstone, or oil shale and possibly coal, are the sources for the asphaltic crude found in the upper Green River. Non-associated gas in the upper Green River could be from coaly deposits in the upper Green River, or migrated up from the lower Green River, or a combination of both. The lithology of all three reservoirs is similar; fractured sandstone, shale, limestone, and marlstone beds having generally low intergranular porosity and permeability. The strata were deposited in lacustrine and alluvial environments.