New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas Operations
Environ Sci Technol
20 Oct 2014
N. R. Warner, T. H. Darrah, R. B. Jackson, R. Millot, W. Kloppmann, and A. Vengosh
Researchers discover a way to determine if water contamination is due to frac water
Iodide, Bromide, and Ammonium in Hydraulic Fracturing and Oil and Gas Wastewaters: Environmental Implications
Environ Sci Technol
14 Jan 2015
Jennifer S. Harkness, Gary S. Dwyer, Nathaniel R. Warner, Kimberly M. Parker, William A. Mitch, and Avner Vengosh
This paper presents a systematic evaluation of iodide and ammonium concentrations in conventional and unconventional (Marcellus and Fayetteville shales) oil and gas wastewaters, as well as halides and ammononium concentrations in treated effluents, downstream surface waters, and a WV spill site.
Enhanced Formation of Disinfection Byproducts in Shale Gas Wastewater-Impacted Drinking Water Supplies
Environ Sci Technol
09 Sep 2014
Kimberly M. Parker, Teng Zeng, Jennifer Harkness, Avner Vengosh, and William A. Mitch
Noble gases identify the mechanisms of fugitive gas contamination in drinking water wells overlying the Marcellus and Barnett Shales
Thomas H. Darrah, Avner Vengosh, Robert B. Jackson, Nathaniel R. Warner, and Robert J. Poreda
Researchers examine hydrocarbon abundance and isotopic compositions to assess whether elevated levels of hydrocarbon gas in drinking water aquifers near gas wells are natural or anthropogenic, and the mechanisms of fugitive gas contamination.
The Environmental Costs and Benefits of Fracking
09 Aug 2014
Robert B. Jackson, Avner Vengosh, J. William Carey, Richard J. Davies, Thomas H. Darrah, Francis O'Sullivan, and Gabrielle Pétron
A comprehensive review of the environmental consequences of unconventional energy extraction and hydraulic fracturing, including production estimates, water intensity, issues of well integrity and potential leakage of chemicals, brines, or gases, water quality, the potential for induced seismicity and the life-cycle emissions of hydrocarbons.
Assessment and risk analysis of casing and cement impairment in oil and gas wells in Pennsylvania, 2000–2012
Anthony R. Ingraffea, Martin T. Wells, Renee L. Santoro, and Seth B. C. Shonkoff
Previous research has demonstrated that proximity to unconventional gas development is associated with elevated concentrations of methane in groundwater aquifers in Pennsylvania. To date, the mechanism of this migration is poorly understood. Our study, which looks at more than 41,000 conventional and unconventional oil and gas wells, helps to explain one possible mechanism of methane migration: compromised structural integrity of casing and cement in oil and gas wells. Additionally, methane, being the primary constituent of natural gas, is a strong greenhouse gas. The identification of mechanisms through which methane may migrate to the atmosphere as fugitive emissions is important to understand the climate dimensions of oil and gas development.
A Critical Review of the Risks to Water Resources from Unconventional Shale Gas Development and Hydraulic Fracturing in the United States
Environmental Science & Technology
07 Mar 2014
Avner Vengosh, Robert B. Jackson, Nathaniel Warner, Thomas H. Darrah, Andrew Kondash
This paper provides a critical review of the potential risks that shale gas operations pose to water resources, with an emphasis on case studies mostly from the U.S.
Matrix Complications in the Determination of Radium Levels in Hydraulic Fracturing Flowback Water from Marcellus Shale
Environmental Technology & Letters
Andrew W. Nelson, Dustin May, Andrew W. Knight, Eric S. Eitrheim, Marinea Mehrho, Robert Shannon, Robert Litman, Michael K. Schultz
This study investigates the utility of common radium analysis methods using a representative Marcellus Shale flowback water sample, and finds that the high ionic strength of flowback water may make commonly used wet analysis unreliable in determining radium content of flowback waters.
Oil and gas wells and their integrity: Implications for shale and unconventional resource exploitation
Marine and Petroleum Geology
Richard J. Davies, Sam Almond, Robert S. Ward, Robert B. Jackson, Charlotte Adams, Fred Worrall, Liam G. Herringshaw, Jon G. Gluyas, Mark A. Whitehead
This reviews datasets from around the globe in order to provide an estimate of the number of producing, idle, abandoned and orphaned onshore hydrocarbon wells globally and to document the number of wells that are known to have had some form of well barrier and/or integrity failure.
Shale gas development impacts on surface water quality in Pennsylvania
Olmstead, S. M., Muehlenbachs, L. A., Shih, J.-S., Chu, Z., & Krupnick, A. J.
This paper conducts a large-scale examination of the extent to which Marcellus shale gas development activities affect surface water quality in Pennsylvania.