· 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 Lewis Total Petroleum System

The Lewis TPS within the Southwestern Wyoming Province of Wyoming, Colorado, and Utah is a complex of marine strata that contains significant quantities of gas (Hettinger and Roberts, 2005). At the time of the USGS assessment, Hettinger and Roberts (2005) reported that between 600 and 675 BCFG and minor amounts of oil had been produced since 1974. Previous investigations reveal that the sandstone reservoirs have a net thickness of as much as 600 feet. The sandstones were deposited in deltaic and turbidite systems, and some basin-floor sand lobes extend across as many as 30 townships (Hettinger and Roberts, 2005).