A debate rages as to whether abandoned oil and gas wells have to be sealed to prevent
methane leakage–a potent greenhouse gas–or whether the valuable infrastructure can be …

Abstract Groundwater 18O/16O, 2H/1H, 13C/12C, 3H, and 14C data can help quantify
molecular movements and chemical reactions governing groundwater recharge, quality …

The origin of natural gases, in particular those containing methane (CH 4 or C 1), ethane (C
2 H 6 or C 2), propane (C 3 H 8 or C 3) and carbon dioxide (CO 2), is commonly interpreted …

We studied a large dataset of∼ 2600 shale gas samples from 76 geological formations in 38
sedimentary basins located in eleven countries. Shale gases contain mostly hydrocarbons …

Releases of stray natural gas into groundwater from oil and gas exploration, production, or
storage can pose a risk to groundwater users and landowners in the form of a fire or …

Concern persists over the potential for unconventional oil and gas development to
contaminate groundwater with methane and other chemicals. These concerns motivated our …

The detection and attribution of methane in aquifers overlying oil and gas reservoirs has
recently gained increasing attention internationally. The Surat Basin, in the Great Artesian …

Mature oil fields potentially contain multiple fluid migration pathways toward protected
groundwater (total dissolved solids, TDS, in nonexempted aquifer< 10,000 mg/L) because of …

Chemical and isotopic data for water co-extracted with hydrocarbons in oil and gas fields are
commonly used to examine the source of the formation water and possible impacts on …

Environmental concerns regarding the potential for drinking water contamination in shallow
aquifers have accompanied unconventional energy development in the northern …