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Thursday, June 27, 2013

Brookian Sequence Well Log Correlation Sections and Occurrence of Gas Hydrates, North-Central North Slope, Alaska

USGS Publication: Scientific Investigations Report
Gas hydrate research has a long history in northern Alaska. This research includes the drilling, coring, and well log evaluation of two gas hydrate stratigraphic test wells and two resource assessments of gas hydrates on the Alaska North Slope. Building upon these previous investigations, this report provides a summary of the pertinent well log, gas hydrate, and stratigraphic data for key wells related to gas hydrate occurrence in the north-central North Slope.


Thursday, June 27, 2013

First Place Poster Award: 2012 Gulf Coast Association of Geological Societies

Publication

Poster awarded First Place for the Gordon I. Atwater Award recognizing best research poster presented at the 2012 Gulf Coast Association of Geological Societies Convention on October 21-24, 2012 in Austin, TX.


Wednesday, June 26, 2013

USGS National Assessment of Geologic Carbon Dioxide Storage Resources

Press Release & Publication
The USGS recently completed an evaluation of the technically accessible storage resource (TASR) for carbon dioxide (CO2) for 36 sedimentary basins in the onshore areas and State waters of the United States. The TASR is an estimate of the geologic storage resource that may be available for CO2 injection and storage and is based on current geologic and hydrologic knowledge of the subsurface and current engineering practices. By using a geology-based probabilistic assessment methodology, the USGS assessment team members obtained a mean estimate of approximately 3,000 metric gigatons (Gt) of subsurface CO2 storage capacity that is technically accessible below onshore areas and State waters; this amount is more than 500 times the 2011 annual U.S. energy-related CO2 emissions of 5.5 Gt (U.S. Energy Information Administration, 2012).


Wednesday, June 12, 2013

Regional Maps of Subsurface Geopressure Gradients of the Gulf of Mexico Basin

USGS Publication: Open-File Report
The U.S. Geological Survey created a comprehensive geopressure-gradient model of the regional pressure system spanning the onshore and offshore Gulf of Mexico basin, USA. This model was used to generate ten maps that included (1) five contour maps characterizing the depth to the surface defined by the first occurrence of isopressure gradients ranging from 0.60 psi/ft to 1.00 psi/ft, in 0.10-psi/ft increments; and (2) five supporting maps illustrating the spatial density of the data used to construct the contour maps.


Saturday, June 01, 2013

Direct estimation of diffuse gaseous emissions from coal fires: current methods and future directions

Outside Publication: International Journal of Coal Geology
Coal fires occur in nature spontaneously, contribute to increases in greenhouse gases, and emit atmospheric toxicants. Increasing interest in quantifying coal fire emissions has resulted in the adaptation and development of specialized approaches and adoption of numerical modeling techniques. Overview of these methods for direct estimation of diffuse gas emissions from coal fires is presented in this paper.


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