Code Name Area km2 State 1 S1 Area % S1 Oil % S1 Gas % State 2 S2 Area % S2 Oil % S2 Gas % State 3 S3 Area % S3 Oil % S3 Gas % State 4 S4 Area % S4 Oil % S4 Gas % State 5 S5 Area % S5 Oil % S5 Gas % State 6 S6 Area % S6 Oil % S6 Gas % State 7 S7 Area % S7 Oil % S7 Gas % State 8 S8 Area % S8 Oil % S8 Gas % State 9 S9 Area % S9 Oil % S9 Gas % State 10 S10 Area % S10 Oil % S10 Gas % State 11 S11 Area % S11 Oil % S11 Gas % State 12 S12 Area % S12 Oil % S12 Gas % State 13 S13 Area % S13 Oil % S13 Gas % State 14 S14 Area % S14 Oil % S14 Gas % 50200101 Conventional Ferron Sandstone Gas 6889.747409 Utah 100 100 50200161 "Deep (6,000 feet plus) Coal and Sandstone Gas" 632.4794476 Utah 100 100 50200181 Northern Coal Fairway/Drunkards Wash 50.200181 Utah 100 100 50200182 Central Coal Fairway/Buzzards Bench 1021.200899 Utah 100 100 50200183 Southern Coal Fairway 678.0288061 Utah 100 100 50200184 Joes Valley and Messina Grabens 294.7063247 Utah 100 50200185 Southern Coal Outcrop 144.0034467 Utah 100 100 50200201 Uinta-Piceance Basin Conventional Gas 41139.98297 Colorado 36.36396463 40 Utah 63.63603537 60 50200261 Uinta Basin Continuous Gas 8367.007003 Utah 100 100 50200262 Uinta Basin Transitional Gas 5189.873081 Utah 100 100 50200263 Piceance Basin Continuous Gas 1433.628322 Colorado 100 100 50200264 Piceance Basin Transitional Gas 2534.992555 Colorado 100 100 50200281 Uinta Basin Blackhawk Coalbed Gas 7073.147552 Utah 100 100 50200282 Mesaverde Group Coalbed Gas 16549.72684 Colorado 73.41624021 90 Utah 26.58375979 10 50200361 Piceance Basin Continuous Gas 8380.91569 Colorado 100 100 50200362 Uinta Basin Continuous Gas 17193.40703 Colorado 1.54452747 2 Utah 98.45547253 98 50200363 Uinta-Piceance Transitional and Migrated Gas 10340.29865 Colorado 47.18573728 65 Utah 52.81426272 35 50200401 Hanging Wall 12718.68186 Colorado 59.16948367 70 70 Utah 40.83051633 30 30 50200402 Paleozoic/Mesozoic 62855.80638 Colorado 43.49787899 44 44 Utah 56.50212101 56 56 50200501 Uinta Green River Conventional Oil and Gas 22027.61912 Colorado 2.952664421 2 Utah 97.04733558 98 50200502 Piceance Green River Conventional Oil 4588.087604 Colorado 100 50200561 Deep Uinta Overpressured Continuous Oil 2909.5999 Utah 100 100