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Tuesday, January 29, 2013

A USANS/SANS study of the accessibility of pores in the Barnett Shale to methane and water

Outside Publication: Energy & Fuels 
Shale is an increasingly important source of natural gas in the United States. The gas is held in fine pores that need to be accessed by horizontal drilling and hydrofracturing techniques. Understanding the nature of the pores may provide clues to making gas extraction more efficient. We have investigated two Mississippian Barnett Shale samples, combining small-angle neutron scattering (SANS) and ultrasmall-angle neutron scattering (USANS) to determine the pore size distribution of the shale over the size range 10 nm to 10 μm...


Tuesday, January 29, 2013

Assessment of Undiscovered Oil and Gas Resources of the Cretaceous-Tertiary Composite Total Petroleum System, Taranaki Basin Assessment Unit, New Zealand

USGS Publication: Fact Sheet 2012–3139
Using a geology-based assessment methodology, the USGS estimated mean volumes of 487 million barrels of oil, 9.8 trillion cubic feet of gas, and 408 million barrels of natural gas liquids in the Cretaceous-Tertiary Composite Total Petroleum System coincident Taranaki Basin Assessment Unit.


Thursday, January 10, 2013

New Hydraulic Fracturing ("Fracking") FAQs

USGS releases new Frequently Asked Questions (FAQs) on Hydraulic Fracturing ("Fracking").  A new Hydraulic Fracturing Website and Multimedia Gallery are also now online.

 


Thursday, January 03, 2013

Stratigraphic Cross Section of Measured Sections and Drill Holes of the Neslen Formation and Adjacent Formations, Book Cliffs Area

Colorado and Utah

USGS Publication: Open-File Report 2012–1260
This study updates a stratigraphic cross section published as plate 2 in Kirschbaum and Hettinger (2004) Digital Data Series 69-G. The datum is a marine/tidal ravinement surface within the Cozzette Sandstone Member of the Iles Formation and the Thompson Canyon Sandstone and Sulphur Canyon Sandstone Beds of the Neslen Formation.


Wednesday, January 02, 2013

Geophysical and Lithologic Well Logs in the Piceance Basin

Website News
2,263 scanned logs of various types including gamma ray, sonic, neutron, caliper, and lithologic descriptions are available for 621 different wells in the Piceance Basin of western Colorado. Logged intervals generally focus on the Green River Formation which contains large amounts of oil shale in this area. Image quality varies considerably with the condition of the starting material. Files are PDFs or TIFFs and file size ranges up to 560 megabytes with and an average size of 33 megabytes. This page contains data downloads for Piceance Basin, 2010 Oil Shale Assesment, compiled from DDS-69-Y.


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