Using environmental tracers and modelling to identify natural and gas well-induced emissions of methane into streams
| Autor: | Susan L. Brantley, Paul L. Grieve, Scott A. Hynek, Victor M. Heilweil, D. K. Solomon, Todd Sowers, David Yoxtheimer, Garth T. Llewellyn |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Base flow 0208 environmental biotechnology Borehole Soil science Aquifer 02 engineering and technology STREAMS 010501 environmental sciences 01 natural sciences Pollution Methane 020801 environmental engineering chemistry.chemical_compound chemistry Geochemistry and Petrology Environmental Chemistry Environmental science Groundwater 0105 earth and related environmental sciences Water well Riparian zone |
| Zdroj: | Applied Geochemistry. 91:107-121 |
| ISSN: | 0883-2927 |
| DOI: | 10.1016/j.apgeochem.2017.12.022 |
| Popis: | Development of shale gas wells sometimes results in migration of methane (CH4) from boreholes into aquifers. Identification of leakage has relied on analysis of CH4 in individual groundwater samples, usually from water wells; however, collection of point data is expensive and prone to artefacts. Methane analysis in streams is a novel way to find potential leakage of CH4 to groundwater. Here, dissolved hydrocarbons and geochemical tracers were measured in streams during base flow in watersheds with high densities of shale gas wells in Pennsylvania (PA) to identify characteristics related to leaking gas wells. Three streams with no known contamination from gas wells and one stream near a gas well previously reported to be leaking CH4 were investigated. The characteristics observed in the stream near the putatively leaking gas well that distinguish it from the streams without leaks include higher CH4 concentrations in riparian groundwater (as high as 4600 versus 206 μg/L), a relatively high gas influx to the stream channel (>70 versus |
| Databáze: | OpenAIRE |
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