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'Problem wells' source of greenhouse gas at unexpected stage of natural gas production

Researchers used airborne laboratory to measure methane gas above shale gas wells during drilling phase, finding high-emitting wells contributing large portion of total emissions. This discovery could lead to development new methods inventory methane emissions and better define environmental impacts of shale gas development.

SourcePurdue University·JournalProceedings of the National Academy of Sciences·DateApr 14, 2014

Stray gases found in water wells near shale gas sites

A Duke University-led study reveals that homeowners within one kilometer of shale gas wells are more likely to have contaminated drinking water with methane, ethane, and propane. The research analyzed 141 drinking water samples from private wells in northeastern Pennsylvania's Marcellus shale basin.

SourceDuke University·JournalProceedings of the National Academy of Sciences·DateJun 24, 2013

First risk assessment of shale gas fracking to biodiversity

A recent study published in Annals of the New York Academy of Sciences explores the threat posed by shale gas fracking to biodiversity. The research reveals potential impacts on ecosystems, including salinization of soils, surface waters, and fragmentation of forests.

SourceWiley·JournalAnnals of the New York Academy of Sciences·DateJun 17, 2013

Analysis of fracking wastewater yields some surprises

Hydraulically fractured natural gas wells in the Marcellus shale region produce about 35% as much wastewater per unit of gas recovered as conventional wells. The total amount of wastewater has increased by 570% since 2004, threatening to overwhelm the region's wastewater-disposal infrastructure capacity.

SourceDuke University·JournalWater Resources Research·DateJan 22, 2013

Marcellus brine migration likely natural, not man-made

A Duke University study suggests naturally occurring pathways allowed salts and gases from the Marcellus shale formation to migrate into shallow drinking water aquifers. The study found elevated levels of salinity with similar geochemistry to deep Marcellus brine in drinking water samples.

SourceDuke University·JournalProceedings of the National Academy of Sciences·DateJul 9, 2012