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Friday, August 29, 2014

Standardization of reflectance measurements in dispersed organic matter: Results of an exercise to improve interlaboratory agreement

Outside Publication: Marine and Petroleum Geology
Vitrinite reflectance generally is considered the most robust thermal maturity parameter available for application to hydrocarbon exploration and petroleum system evaluation. However, until 2011 there was no standardized methodology available to provide guidelines for vitrinite reflectance measurements in shale...

Thursday, August 28, 2014

Experimental investigation of changes in methane adsorption of bitumen-free Woodford Shale with thermal maturation induced by hydrous pyrolysis

Outside Publication: Marine and Petroleum Geology
This study quantifies the effects of organic-matter (OM) thermal maturity on methane (CH4) sorption, on the basis of five samples that were artificially matured through hydrous pyrolysis achieved by heating samples of immature Woodford Shale under five different time–temperature conditions. CH4-sorption isotherms at 35 °C, 50 °C, and 65 °C, and pressures up to 14 MPa on dry, solvent-extracted samples of the artificially matured Woodford Shale were measured...


Thursday, August 28, 2014

Benzo[b]naphthothiophenes and alkyl dibenzothiophenes: Molecular tracers for oil migration distances

Outside Publication: Marine and Petroleum Geology
The secondary migration of petroleum is one of the most critical geological processes responsible for the accumulation of hydrocarbons in a sedimentary basin. Pyrrolic nitrogen compounds such as carbazoles and benzocarbazoles are thought to be practical molecular indicators for estimating relative migration distances of oil...

Friday, August 15, 2014

Assessment of unconventional oil and gas resources in Northeast Mexico, 2014

National and Global Petroleum Assessment

USGS Publication: Fact Sheet 2014–3047
Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 0.78 billion barrels of unconventional oil, 23.5 trillion cubic feet of unconventional gas, and 0.88 billion barrels of natural gas liquids in the Sabinas Basin, Burgos Basin, and Tampico-Misantla Basin provinces of northeast Mexico.

Monday, August 11, 2014

Detailed North-South Cross Section Showing Environments of Deposition, Organic Richness, and Thermal Maturities of Lower Tertiary Rocks in the Uinta Basin, Utah

USGS Publication: Scientific Investigations Map 3304The Uinta Basin of northeast Utah has produced large amounts of hydrocarbons from lower Tertiary strata since the 1960s. Recent advances in drilling technologies, in particular the development of efficient methods to drill and hydraulically fracture horizontal wells, has spurred renewed interest in producing hydrocarbons from unconventional low-permeability dolomite and shale reservoirs in the lacustrine, Eocene Green River Formation. ...

Monday, August 11, 2014

Re–Os geochronology and Os isotope fingerprinting of petroleum sourced from a Type I lacustrine kerogen

Insights from the natural Green River petroleum system in the Uinta Basin and hydrous pyrolysis experiments

Outside Publication: Geochimica et Cosmochimica Acta
Rhenium–osmium (Re–Os) geochronology of marine petroleum systems has allowed the determination of the depositional age of source rocks as well as the timing of petroleum generation. In addition, Os isotopes have been applied as a fingerprinting tool to correlate oil to its source unit. To date, only classic marine petroleum systems have been studied...

Monday, August 11, 2014

Asphaltene content and composition as a measure of Deepwater Horizon oil spill losses within the first 80 days

Outside Publication: Organic Geochemistry
The composition and content of asphaltenes in spilled and original wellhead oils from the Deepwater Horizon (DWH) incident provide information on the amount of original oil lost and the processes most responsible for the losses within the first 80 days of the active spill. Spilled oils were collected from open waters, coastal waters and coastal sediments during the incident...

Thursday, August 07, 2014

Powder X-Ray Diffraction Laboratory, Reston, Virginia

USGS Publication: Fact Sheet 2014-3063
The powder x-ray diffraction (XRD) laboratory is managed jointly by the Eastern Mineral and Environmental Resources and Eastern Energy Resources Science Centers. Laboratory scientists collaborate on a wide variety of research problems involving other U.S. Geological Survey (USGS) science centers and government agencies, universities, and industry. Capabilities include identification and quantification of crystalline and amorphous phases, and crystallographic and atomic structure analysis for a wide variety of sample media...

Tuesday, August 05, 2014

Reprint of "Organic petrology of the Aptian-age section in the downdip Mississippi Interior Salt Basin, Mississippi, USA: Observations and preliminary implications for thermal maturation history"

Outside Publication: International Journal of Coal Geology
This study identifies a thermal maturity anomaly within the downdip Mississippi Interior Salt Basin (MISB) of southern Mississippi, USA, through examination of bitumen reflectance data from Aptian-age strata (Sligo Formation, Pine Island Shale, James Limestone, and Rodessa Formation)...




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Page Last Modified: Wednesday, December 03, 2014