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Monday, February 27, 2017

Assessment of Coalbed Gas Resources of the Kalahari Basin Province of Botswana, Zimbabwe, and Zambia, Africa, 2016

USGS Publication: Fact Sheet 2017-3003
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 4.5 trillion cubic feet of coalbed gas in the Kalahari Basin Province of Botswana, Zambia, and Zimbabwe, Africa...

Wednesday, February 22, 2017

Assessment of Permian coalbed gas resources of the Karoo Basin Province, South Africa and Lesotho, 2016

USGS Publication: Fact Sheet 2016-3103
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 5.27 trillion cubic feet of coalbed gas in the Karoo Basin Province...

Wednesday, January 18, 2017

Enhanced coal-dependent methanogenesis coupled with algal biofuels: Potential water recycle and carbon capture

Outside Publication: International Journal of Coal Geology
Many coal beds contain microbial communities that can convert coal to natural gas (coalbed methane). Native microorganisms were obtained from Powder River Basin (PRB) coal seams with a diffusive microbial sampler placed downhole and used as an inoculum for enrichments with different nutrients to investigate microbially-enhanced coalbed methane production (MECoM)...

Tuesday, February 24, 2015

Stochastic reservoir simulation for the modeling of uncertainty in coal seam degasification

Outside Publication: Fuel
Coal seam degasification improves coal mine safety by reducing the gas content of coal seams and also by generating added value as an energy source. Coal seam reservoir simulation is one of the most effective ways to help with these two main objectives. As in all modeling and simulation studies, how the reservoir is defined and whether observed productions can be predicted are important considerations...


Wednesday, January 07, 2015

Central Appalachian Basin Natural Gas Database: Distribution, Composition, and Origin of Natural Gases

USGS Publication: Open-File Report 2014-1207
The U.S. Geological Survey (USGS) has compiled a database consisting of three worksheets of central Appalachian basin natural gas analyses and isotopic compositions from published and unpublished sources of 1,282 gas samples from Kentucky, Maryland, New York, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia...


Friday, December 19, 2014

Map of assessed coalbed-gas resources in the United States, 2014

USGS Publication: Digital Data Series 69-II
This report presents a digital map of coalbed-gas resource assessments in the United States as part of the U.S. Geological Survey’s (USGS) National Assessment of Oil and Gas Project. Using a geology-based assessment methodology, the USGS quantitatively estimated potential volumes of undiscovered, technically recoverable natural gas resources within coalbed-gas assessment units (AUs).


Friday, July 25, 2014

Inference of strata separation and gas emission paths in longwall overburden using continuous wavelet transform of well logs and geostatistical simulation

Outside Publication: Journal of Applied Geophysics
Prediction of potential methane emission pathways from various sources into active mine workings or sealed gobs from longwall overburden is important for controlling methane and for improving mining safety. The aim of this paper is to infer strata separation intervals and thus gas emission pathways from standard well log data. The proposed technique was applied to well logs acquired through the Mary Lee/Blue Creek coal seam of the Upper Pottsville Formation in the Black Warrior Basin, Alabama, using well logs from a series of boreholes aligned along...


Friday, May 23, 2014

Organic substances in produced and formation water from unconventional natural gas extraction in coal and shale

Outside Publication: International Journal of Coal Geology
Organic substances in produced and formation water from coalbed methane (CBM) and gas shale plays from across the USA were examined in this study. Results from five CBM plays and two gas shale plays (including the Marcellus Shale) show a myriad of organic chemicals present in the produced and formation water. Organic compound...


Friday, March 28, 2014

Coalbed Natural Gas Exploration, Drilling Activities, and Geologic Test Results

2007–2010, in Wainwright, Alaska

USGS Publication: Open-File Report 2014–1004
The U.S. Geological Survey, in partnership with the U.S. Bureau of Land Management, the North Slope Borough, and the Arctic Slope Regional Corporation conducted a four-year study designed to identify, define, and delineate a shallow coalbed natural gas (CBNG) resource with the potential to provide locally produced, affordable power to the community of Wainwright, Alaska.


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Page Last Modified: Wednesday, December 03, 2014