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Wednesday, December 23, 2015

U.S. Geological Survey assessment of reserve growth outside of the United States

USGS Publication: Scientific Investigations Report 2015-5091
The U.S. Geological Survey estimated volumes of potential additions to oil and gas reserves for the United States by reserve growth in discovered accumulations. These volumes were derived by using a new methodology developed by the U.S. Geological Survey and reviewed by the American Association of Petroleum Geologists Committee on Resource Evaluation.


Tuesday, December 22, 2015

The U.S. Geological Survey coal quality (COALQUAL) database version 3.0

USGS Publication: Data Series 975

Since the mid-1970s, the U.S. Geological Survey (USGS) has maintained a coal quality database of national scope named USCHEM, which currently contains data for over 13,000 samples. A subset of the USCHEM database called COALQUAL Version 1.3 was initially published in 1994 and was followed by Version 2.0 in 1997...


Monday, December 21, 2015

Rapid analysis of kerogen hydrogen-to-carbon ratios in shale and mudrocks by laser-induced breakdown spectroscopy

Outside Publication: Energy & Fuels
Evaluation of organic matter quality in petroleum source and reservoir rocks is vital for economic, drilling, and production decisions. However, current methods for assessing kerogen quality in shales and mudrocks are either time-intensive and undesirable from a health, safety, and waste-disposal standpoint or indirect measurements of the factors of greatest interest and utility


Thursday, December 17, 2015

Assessment of undiscovered shale gas and shale oil resources in the Mississippian Barnett Shale, Bend Arch–Fort Worth Basin Province, north-central Texas

USGS Publication: Fact Sheet 2015-3078
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean volumes of 53 trillion cubic feet of shale gas, 172 million barrels of shale oil, and 176 million barrels of natural gas liquids in the Barnett Shale of the Bend Arch–Fort Worth Basin Province of Texas.


Monday, December 14, 2015

Re-Os age for the Lower-Middle Pennsylvanian Boundary and comparison with associated palynoflora

Outside Publication: International Journal of Coal Geology
The Betsie Shale Member is a relatively thick and continuous unit that serves as a marker bed across the central Appalachian basin, in part because it includes an organic-rich shale unit at its base that is observable in drill logs. Deposited during a marine transgression, the Betsie Shale Member has been correlated to units in both Wales and Germany and has been proposed to mark the boundary between the Lower and Middle Pennsylvanian Series within North America.

Tuesday, December 08, 2015

Geologic cross section I–I′ through the Appalachian basin from the eastern margin of the Illinois basin, Jefferson County, Kentucky, to the Valley and Ridge province, Scott County, Virginia

USGS Publication: Scientific Investigations Map 3343

Geologic cross section I‒I’ is the fourth in a series of cross sections constructed by the U.S. Geological Survey to document and improve understanding of the geologic framework and petroleum systems of the Appalachian basin. Cross section I‒I’ provides a regional view of the structural and stratigraphic framework of the Appalachian basin from the eastern margin of the...


Wednesday, December 02, 2015

Estimates of Potential Uranium in South Texas Could Equal Five Years of U.S. Needs

Press Release & Publication 
The potential for almost five years of annual domestic U.S. nuclear fuel requirements may exist in south Texas, according to a new USGS assessment of both identified and undiscovered uranium oxide resources. This assessment estimates 60 million pounds of identified, but unmined, uranium resources, and more than 200 million pounds of newly estimated undiscovered resources. …


Wednesday, December 02, 2015

Extraction of Hydrocarbons from High-Maturity Marcellus Shale Using Supercritical Carbon Dioxide

Outside Publication: Energy & Fuels
Shale is now commonly exploited as a hydrocarbon resource. Due to the high degree of geochemical and petrophysical heterogeneity both between shale reservoirs and within a single reservoir, there is a growing need to find more efficient methods of extracting petroleum compounds (crude oil, natural gas, bitumen) from potential source rocks.

Wednesday, December 02, 2015

Mapping of coal quality using stochastic simulation and isometric logratio transformation with an application to a Texas lignite

Outside Publication: International Journal of Coal Geology
Coal is a chemically complex commodity that often contains most of the natural elements in the periodic table. Coal constituents are conventionally grouped into four components (proximate analysis): fixed carbon, ash, inherent moisture, and volatile matter.

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