· 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 Mowry Composite Total Petroleum System

Kirschbaum and Roberts, 2005, report that the TPS is a composite system because it contains petroleum generated from multiple source rocks including marine shale units of the Mowry and Thermopolis Shales and their equivalents, possibly contributions from marine shale of the Allen Hollow Shale Member of the Frontier Formation, and from coaly and lacustrine facies in continental units of the Bear River, Frontier, and Dakota Formations. Oil and gas migrated into fluvial, tidal, deltaic, and shoreface sandstone reservoirs of the Bear River and Frontier, Cloverly, Dakota Sandstone Formations, and Muddy Sandstone Member of the Thermopolis Shale (Kirschbaum and Roberts, 2005). The hydrocarbons were trapped in structural, stratigraphic, and basin-centered accumulations (Kirschbaum and Roberts, 2005). Seals include thick, continuous marine shale and in some cases terrestrial to estuarine mudstone units, diagenetic seals, and capillary pressure seals (Kirschbaum and Roberts, 2005).