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Press Releases, Technical Announcements, Publications, Field Reports, and Science Highlights.


Tuesday, February 26, 2013

Drill Hole Data for Coal Beds in the Powder River Basin, Montana and Wyoming

USGS Publication: Data Series 713
This report by the USGS of the Powder River Basin (PRB) of Montana and Wyoming is part of the U.S. Coal Resources and Reserves Assessment Project. Essential to that project was the creation of a comprehensive drill hole database that was used for coal bed correlation and for coal resource and reserve assessments in the PRB. This drill hole database was assembled using data from the USGS National Coal Resources Data System, several other Federal and State agencies, and selected mining companies.

Tuesday, February 26, 2013

Assessment of Coal in the Powder River Basin, Wyoming and Montana

Assessment of Coal Geology, Resources, and Reserve Base in the Powder River Basin, Wyoming and Montana

USGS Publication: Fact Sheet 2012–3143
Using a geology-based assessment methodology, the U.S. Geological Survey estimated in-place resources of 1.07 trillion short tons of coal in the Powder River Basin, Wyoming and Montana. Of that total, with a maximum stripping ratio of 10:1, recoverable coal was 162 billion tons.
See Press Release for listing of all related publications.


Tuesday, February 26, 2013

Assessment of Coal Geology, Resources, and Reserves in the Montana Powder River Basin

Assessment of Coal Geology, Resources, and Reserves in the Montana Powder River Basin

USGS Publication: Open-File Report 2012–1113
The purpose of this report is to summarize geology, coal resources, and coal reserves in the Montana Powder River Basin assessment area in southeastern Montana. This report represents the fourth assessment area within the Powder River Basin to be evaluated in the continuing USGS. See Press Release for listing of all related publications.

Tuesday, February 26, 2013

New Powder River Basin-Wide Coal Assessment of Recoverable Resources and Reserves

Press Release & Related Publications

The Powder River Basin of Wyoming and Montana contains about 162 billion short tons (BST) of recoverable coal from a total of 1.07 trillion short tons of in-place resources according to a new USGS assessment. This assessment also estimates that 25 BST of those resources are currently economical.


Thursday, February 21, 2013

Assessment of Undiscovered Conventional Oil and Gas Resources of North Africa, 2012

USGS Publication: Fact Sheet 2012–3147
Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 19 billion barrels of technically recoverable undiscovered conventional oil and 370 trillion cubic feet of undiscovered conventional natural gas resources in 8 geologic provinces of North Africa.

Wednesday, February 13, 2013

Groundbreaking Gas Hydrate Research

Field Report: USGS Feature Story
A new project in Japan is helping scientists make significant progress in studying gas hydrates as a potential source for natural gas production. This research advances understanding of the global distribution of gas hydrates as well as whether and how methane contained in gas hydrates can be used as a viable energy source.

Monday, February 11, 2013

In-Place Oil Shale Resources of the Eocene Green River Formation

In-Place Oil Shale Resources Examined by Grade in the Major Basins of the Green River Formation, Colorado, Utah, and Wyoming

USGS Publication: Fact Sheet 2012–3145
Using a geology-based assessment methodology, the USGS estimated a total of 4.285 trillion barrels of oil in-place in the oil shale of the three principal basins of the Eocene Green River Formation. Using oil shale cutoffs of potentially viable (15 gallons per ton) and high grade  (25 gallons per ton), it is estimated that between 353 billion and 1.146 trillion barrels of the in-place resource have a high potential for development.

Tuesday, February 05, 2013

Variability of Oil and Gas Well Productivities for Continuous (Unconventional) Petroleum Accumulations

USGS Publication: Open-File Report 2013‒1001
Over the last decade, oil and gas well productivities were estimated using decline-curve analysis for thousands of wells as part of USGS studies of continuous (unconventional) oil and gas resources in the United States. The estimated ultimate recoveries (EURs) of these wells show great variability that was analyzed at three scales: within an assessment unit (AU), among AUs of similar reservoir type, and among groups of AUs with different reservoir types. 3 SHEETS

Monday, February 04, 2013

New vitrinite reflectance data for the Wind River Basin, Wyoming

USGS Publication: Open-File Report 2013–1002
The Wind River Basin is a large Laramide (Late Cretaceous through Eocene) structural and sedimentary basin that encompasses about 7,400 square miles in central Wyoming. The basin is bounded by the Washakie Range and Owl Creek and southern Bighorn Mountains on the north, the Casper arch on the east and northeast, and the Granite Mountains on the south, and Wind River Range on the west. The purpose of this report is to present new vitrinite reflectance data collected mainly from Cretaceous marine shales in the Wind River Basin to better characterize their thermal maturity and hydrocarbon potential.




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