January 16, 2004
Carbon Dioxide Resource Map Published

A new map produced by the Wyoming State Geological Survey (WSGS) features carbon dioxide (CO2) resources of Wyoming. The 1:500,000-scale map shows important natural sources of CO2, pipelines that carry CO2, wells that have tested high percentages of CO2, gas plants which process CO2-rich gas, and Wyoming's coal-fired power plants and four oil refineries. The power plants and refineries have the potential to contribute CO2 for enhanced oil recovery. The map depicts fields with the greatest potential for enhanced oil recovery from CO2 flooding.

Wyoming's best hope for reversing its declining oil production may be CO2 flooding. The state's crude oil production and proved reserves have declined dramatically since 1970. In 2002, crude oil production was only 54.7 million barrels, down from the all-time high of 160.3 million barrels in 1970. Proved reserves have declined from over one billion barrels in 1970 to less than 525 million barrels at the end of 2002.

Targets for CO2 flooding are oil fields that contained in total approximately 8 billion barrels of original oil in place. Successful CO2 floods in these fields could recover up to 15% of the 8 billion barrels, or 1.2 billion barrels. The process has proven successful at Lost Soldier and Wertz fields where an additional 62 million barrels (10% of the original oil in place) was recovered. Anadarko Petroleum started other CO2 floods in 2003 at Patrick Draw Field in the Green River Basin and at Salt Creek Field in the Powder River Basin. The Salt Creek project may recover an additional 150 million barrels of oil. At peak production rates, the Salt Creek project may temporarily reverse Wyoming's decline in oil production and will contribute additional oil production to Wyoming's total for years to come.

The new map, entitled Carbon dioxide (CO2) map of Wyoming by R.H. De Bruin, C.W. Cook, and J.M. Huss, is WSGS Open File Report 04-1. Initially, the map can be purchased in hard copy only as a plotted color map for $30.00 over-the-counter or by mail (add $6.00 for shipping and handling). Wyoming addresses must include 6% sales tax.

For more information about this topic contact Rod De Bruin at (307) 766-2286, ext. 226 or Email him at rodney.debruin@wyo.gov.

Press Release
from the Office of the Wyoming State Geologist
Ron Surdam, State Geologist