Recent studies have shown that methane leak rates from abandoned oil and gas (AOG) wells may constitute a significant portion of a state’s emissions inventory. These emissions were shown to vary by region which introduces large uncertainty in the US national emissions inventory. In Wyoming, there are currently around 1900 wells identified as “orphaned” which indicates that they are both abandoned and unplugged. In this study, ten orphaned coalbed methane wells were sampled to characterize AOG emission rates in the Powder River Basin in Wyoming. The mean methane emission rate measured at these wells was 645 mg CH4/hr with the majority of these wells emitting in the 100-1000 mg CH4/hr range.
|File Size:||6.34 MB|
|Author:||Jeffrey Nivitanont, Dana Caulton, Eric Robertson, Graeme Finley, Shane Murphy, Matt Burkhart|