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Cisco Oil Field
is an oil field
An oil field is a region with an abundance of oil wells extracting petroleum from below ground. Because the oil reservoirs typically extend over a large area, possibly several hundred kilometres across, full exploitation entails multiple wells scattered across the area...
located in Grand County, Utah
Grand County is a county located in the U.S. state of Utah. As of 2000 the population was 8,485, and by 2005 had been estimated at 8,743. It was named for the Colorado River, which at the time of statehood was known as the Grand River. Its county seat and largest city is Moab.-Geography:According...
. The field was discovered in 1924 in the now abandoned town of Cisco, Utah
Cisco is a ghost town in Grand County, Utah near the junction of State Route 128 and Interstate 70. At one time the town served as a saloon and water-refilling station for the Denver and Rio Grande Western Railroad. The town's demise came with the demise of the steam locomotive. The town site...
. It is one of the oldest oil fields in the state of Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...
New production was discovered in the Cisco townsite during 2005 drilling by a Reno, Nevada-based oil company.
The field produces from channel sands in the Mancos, Dakota
The Dakota Sandstone is a general term for an ill-defined early Cretaceous formation of the Rocky Mountains and Great Plains. It consists of sandy, shallow-marine deposits with intermittent mud flat sediments, and occasional stream deposits...
The Morrison Formation is a distinctive sequence of Late Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light grey, greenish...
formations. Natural gas
Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...
is produced from the Mancos and Dakota formations, while the Morrison production is mostly crude oil.
The oil gravity is 34–35 degree API while the natural gas is 1100 BTU.