· Abstract

· Acknowledgments

· Introduction—Video of Exploration and Production Through Time

· Units of Measure

· Undiscovered Oil and Gas Resources in the Southwestern Wyoming Province

· Undiscovered Gas in the Mesaverde Total Petroleum System

· The Almond Continuous Gas Assessment Unit

· The Rock Springs–Ericson Gas Assessment Unit

· Undiscovered Gas in the Mesaverde–Lance–Fort Union Composite Total Petroleum System

· The Mesaverde–Lance–Fort Union Continuous Gas Assessment Unit

· Undiscovered Gas in the Lewis Total Petroleum System

· The Lewis Continuous Gas Assessment Unit

· Undiscovered Gas in the Hilliard-Baxter-Mancos Total Petroleum System

· The Hilliard-Baxter-Mancos Continuous Gas Assessment Unit

· Undiscovered Gas in the Mowry Composite Total Petroleum System

· The Mowry Continuous Gas Assessment Unit

· Undiscovered Gas in the Lance–Fort Union Composite Total Petroleum System

· The Lance–Fort Union Continuous Gas Assessment Unit

· Reservoirs That Contain the Majority of Undiscovered Gas Resources

· Live Data and Maps

· In Summary

· References Cited

Undiscovered Gas in the Hilliard-Baxter-Mancos Total Petroleum System

The Hilliard-Baxter-Mancos interval, as shown on the generalized correlation chart (fig. 16), was deposited in offshore to nearshore marine settings in the Rocky Mountain foreland basin during an extended period of time in the Late Cretaceous, when the shoreline was predominantly to the west of the TPS (Finn and Johnson, 2005a). The stratigraphic interval included in the TPS ranges from about 3,500 to 6,000 ft thick and contains thick intervals of organic-rich marine shales that are potential source rocks, and thick silty and sandy nearshore to offshore marine intervals that are potential reservoir rocks. This TPS has been sparsely explored, but some promising discoveries have been made (Finn and Johnson, 2005a).