America's Natural Gas Producers and the American Petroleum Institute, two big energy industry organizations, today released their own study of methane emissions during natural gas production, which says the Environmental Protection Agency's overall estimate is perhaps two times too high.
"Specifically, the study found that methane emissions from natural gas operations such as liquids unloading (a technique used to remove water and other liquids from the wellbore to improve the flow of natural gas) are 86 percent lower than EPA estimated. In addition, the study shows that methane emissions from refractured wells (a technique used to prolong production of an existing gas-producing well) are 72 percent lower than EPA estimates. Overall, the study finds that greenhouse gas emissions from natural gas production are as much as 50 percent lower than figures used by EPA," says a summary.
The study is here.
-- Jim Fuquay