...Seth N. Lyman; Huy N. Q. Tran; Trevor L. O’Neil; Marc L. Mansfield We measured a comprehensive suite of pollutants emitted from 58 natural gas-fueled pumpjack engines in Utah’s Uinta Basin. Air–fuel equivalence ratio (the ratio of air taken in by the engine to the amount of air needed...

...Younki Cho; Kathleen M. Smits; Nathaniel L. Steadman; Bridget A. Ulrich; Clay S. Bell; Daniel J. Zimmerle Underground natural gas (NG) pipeline leakage can result in methane (CH 4 ) buildup and migration through the soil. What is not well understood in such scenarios is how the soil conditions...

...Madeleine L. Wright; Alastair C. Lewis As part of climate change commitments, the United Kingdom is considering an incremental transition from natural gas to hydrogen for domestic heating, blending up to 20% of hydrogen (by volume) into the national gas network. We consider the possible impacts...

...Emily Luetschwager; Joseph C. von Fischer; Zachary D. Weller Advanced leak detection (ALD) to survey local natural gas distribution systems has reached a point in technological maturity where new federal regulations will require its use in compliance surveys. Because most of these deployments...

...Detlev Helmig; Michael E. Chang; Brian Lamb The rise of hydraulic fracturing techniques has fostered rapid growth of oil and natural gas (O&NG) extraction in areas across the United States. In the Denver-Julesburg Basin (DJB), which mostly overlaps with Weld County in the Northern Colorado...

... and gas Natural gas The International Panel on Climate Change (IPCC) recently underscored the importance of reducing methane emissions to keep global warming below 1.5°C ( IPCC, 2018 ). However, global natural gas production is increasing, with an estimated 1.7–2.3% of total production (primarily...

... and natural gas wells. Previous studies in oil and gas producing regions have often relied on intensive aircraft campaigns to estimate methane emissions. However, the high cost of airborne campaigns prevents their frequent undertaking, thus providing only daytime snapshots of emissions rather than more...

... is estimated and compared to national inventories. Results from our science-based prospective scenarios can facilitate an informed discussion among the public and policy makers on the climate impact of a potential shale gas development in Europe, and on the appropriate role of natural gas in the worldwide...

... between top-down and bottom-up estimates of regional natural gas (NG) methane (CH 4 ) emissions. In situ mobile downwind measurements are used to document the ethane to methane enhancement ratios (ERs) in emission plumes from NG operations in the region. Enhancement ratios are low (<2% for 87% of NG...

..., these results indicate that OFE is likely a less accurate method than SOE or TFE for this type of facility. 09 05 2017 08 11 2017 This work is part of a multi-method field campaign designed to estimate methane emissions across segments of the natural gas supply chain present in the study area...

... at midstream natural gas gathering and boosting stations in the Fayetteville shale (Arkansas, USA). On-site component-level measurements were combined with engineering estimates to generate comprehensive facility-level methane emission rate estimates (“study on-site estimates (SOE)”) comparable to tracer...

...Daniel J. Zimmerle; Cody K. Pickering; Clay S. Bell; Garvin A. Heath; Dag Nummedal; Gabrielle Pétron; Timothy L. Vaughn; Detlev Helmig; Isobel Jane Simpson Gathering pipelines, which transport gas from well pads to downstream processing, are a sector of the natural gas supply chain for which little...