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.
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.
Estrogen and Androgen Receptor Activities of Hydraulic Fracturing Chemicals and Surface and Ground Water in a Drilling-Dense Region
16 Dec 2013
Christopher D. Kassotis, Donald E. Tillitt, J. Wade Davis, Annette M. Hormann, Susan C. Nagel.
This study collected, solid-phase extracted, and measured water samples in Colorado for estrogen and androgen receptor activities using reporter gene assays in human cell lines.
Impacts of Shale Gas Wastewater Disposal on Water Quality in Western Pennsylvania
Environmental Science & Technology
02 Oct 2013
Warner NR, CA, Christie, RB Jackson, A Vengosh
This study examined the water quality and isotopic compositions of discharged effluents, surface waters, and stream sediments associated with a treatment facility site in western Pennsylvania.
Histopathological Analysis of Fish from Acorn Fork Creek, Kentucky, Exposed to Hydraulic Fracturing Fluid Releases
28 Aug 2013
Diana M. Papoulias and Anthony L. Velasco
The objective of this study was to describe post-fracking water quality in Acorn Fork and evaluate if the changes in water quality could have extirpated Blackside Dace populations.
An Evaluation of Water Quality in Private Drinking Water Wells Near Natural Gas Extraction Sites in the Barnett Shale Formation
Environmental Science & Technology
25 Jul 2013
Brian E. Fontenot, Laura R. Hunt, Zacariah L. Hildenbrand, Doug D. Carlton Jr., Hyppolite Oka, Jayme L. Walton, Dan Hopkins, Alexandra Osorio, Bryan Bjorndal, Qinhong H. Hu, and Kevin A. Schug
This study evaluated samples from 100 private drinking water wells using historical baseline data and found that arsenic, selenium, strontium and total dissolved solids (TDS) exceeded the Environmental Protection Agency’s Drinking Water Maximum Contaminant Limit (MCL) in some samples located within 3 km of active natural gas wells.
Groundwater protection and unconventional gas extraction: the critical need for field-based hydrogeological research.
Jackson, R. E., Gorody, A. W., Mayer, B., Roy, J. W., Ryan, M. C., & Van Stempvoort, D. R.
Article provides a review of case studies which illustrate how stray or fugitive gas from deep gas-rich formations has migrated from the subsurface into shallow aquifers and how it has affected groundwater quality and summarizes studies describing how structural features influence the role of natural and induced fractures as contaminant fluid migration pathways.
Increased stray gas abundance in a subset of drinking water wells near Marcellus shale gas extraction
Proceedings of the National Academy of Sciences
03 Jun 2013
Robert B. Jackson, Avner Vengosh, Thomas H. Darrah, Nathaniel R. Warner, Adrian Down, Robert J. Poreda, Stephen G. Osborn, Kaiguang Zhao and Jonathan D. Karr
This study analyzed 141 drinking water wells in northeastern Pennsylvania, examining natural gas concentrations and isotopic signatures with proximity to shale gas wells. Data suggest that some homeowners living < 1 from gas wells have drinking water contaminated with stray gases.
Geochemical and isotopic variations in shallow groundwater in areas of the Fayetteville Shale development, north-central Arkansas
14 May 2013
Nathaniel R. Warner, Timothy M. Kresse, Phillip D. Hays, Adrian Down, Jonathan D. Karr, Robert B. Jackson, Avner Vengosh
This study investigates the possible degradation of water quality in shallow aquifers overlying producing shale formations in north-central Arkansas.
Evaluation of Methane Sources in Groundwater in Northeastern Pennsylvania
Molofsky, L. J., Connor, J. A., Wylie, A. S., Wagner, T., & Farhat, S. K.