OF-05-09 Shapefiles of the Oil and Gas Fields Map of Colorado Download Publication Details ArcMap shapefiles for the oil and gas fields, sedimentary basins and Precambrian rock outcrops. Some of the key fields in the oil and gas GIS shapefiles include the status, the commodity (oil, gas, or carbon dioxide), the pay zone (geologic formation), and the primary pay zone. When both gas and oil are produced, the field is typically classified based on the gasoil ratio; gas fields are those characterized by 20,000 cubic feet of gas per barrel of oil or more. Field boundaries were based on information from the Colorado Oil and Gas Conservation Commission (COGCC) and selected industry information. Field boundaries are approximate and do not distinguish between different producing formations. Fields encompass all wells that have been hooked up to a pipeline. Dry holes may exist within the fields. Field discoveries are through 1998. (1:24,000). Digital ZIP download. OF-05-09D Citations Colorado Geological Survey. “OF-05-09 Shapefiles for 2002 Oil and Gas Fields Map of Colorado.” Oil and Gas Fields. Open File Report. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2005. https://coloradogeologicalsurvey.org/publications/shapefiles-oil-gas-fields-map-colorado.