Study Identifies Shale Well Pads With High Methane EmissionsSource: Shale Energy Insider | 16 April 2014
High levels of the greenhouse gas methane were found above shale gas wells at a production point not thought to be an important emissions source, according to a study jointly led by Purdue and Cornell universities. The findings could have implications for the evaluation of the environmental impacts from natural gas production.
The study, which is one of only a few to use a so-called “top down” approach that measures methane gas levels in the air above wells, identified seven individual well pads with high emission levels and established their stage in the shale-gas development process.
The high-emitting wells made up less than 1% of the total number of wells in the area and were all found to be in the drilling stage, a preproduction stage not previously associated with significant emissions.