Precambrian Chuar source rock play: An exploration case history in southern Utah
Journal Article
·
· AAPG Bulletin
OSTI ID:433069
- BHP Petroleum, Houston, TX (United States)
Source rock potential of the Upper Proterozoic Chuar Group, specifically the Walcott Member of the Kwagunt Formation, provides the basis for a petroleum play in southern Utah. Analyses of Chuar black shales from outcrops in the Grand Canyon show total organic carbon values of 3-9%, hydrogen indices up to 255, and maximum maturity within the oil window. Modeling indicates a potential 150 mi{sup 2} (400 km{sup 2}) area with a minimum generative potential of 2700 MBO{sup *}. Chuar source rocks are proposed as one part of a petroleum system that includes reservoirs in the Cambrian Tapeats Sandstone and seal in the overlying Bright Angel Shale. Prospective structures include anticlines of Laramide age not drilled through the Tapeats interval. One such structure is the Circle Cliffs uplift, which exhibits an area under closure of 9000 mi{sup 2} (2300 km{sup 2}) at the top of the Devonian. In 1994, BHP Petroleum drilled the 28-1 Federal well on the Circle Cliffs structure. The well logged 142 ft (43 m) of Tapeats porosity (>7%) and flowed CO{sub 2} gas at rates up to 5.0 Mcf{sup *} per day. Analysis of bitumen in the reservoir indicated an earlier hydrocarbon charge and suggested a new oil type for the region.
- OSTI ID:
- 433069
- Journal Information:
- AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 1 Vol. 81; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Precambrian-Cambrian oil play in southern Utah
Preliminary petroleum source rock assessment of upper Proterozoic Chuar group, Grand Canyon, Arizona
Petroleum prospectivity in Precambrian and Early Paleozoic basins, Australia
Journal Article
·
Thu Jun 01 00:00:00 EDT 1995
· AAPG Bulletin
·
OSTI ID:86664
Preliminary petroleum source rock assessment of upper Proterozoic Chuar group, Grand Canyon, Arizona
Conference
·
Tue Feb 28 23:00:00 EST 1989
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
·
OSTI ID:5993452
Petroleum prospectivity in Precambrian and Early Paleozoic basins, Australia
Conference
·
Thu Feb 28 23:00:00 EST 1991
· AAPG Bulletin (American Association of Petroleum Geologists); (United States)
·
OSTI ID:5802876