Multi-satellite imaging of a gas well blowout enables quantification of total methane emissions

Incidents involving loss of control of oil/gas wells can result in large but variable emissions whose impact on the global methane budget is currently unknown. On November 1, 2019, a gas well blowout was reported in the Eagle Ford Shale. By combining satellite observations at different spatial and temporal scales, we quantified emissions 10 times during the 20-day event. Our multi-satellite synthesis captures both the short-term dynamics and total integrated emissions of the blowout. Such detailed event characterization was previously not possible from space, and difficult to do with surface measurements. We present 30-m methane and carbon dioxide plumes from the PRISMA satellite, which let us estimate flare combustion efficiency (87%). Integrating emissions across all satellites, we estimate 4800 ± 980 metric tons lost methane. Blowouts occur across the globe and multi-satellite observations can help to determine their pervasiveness, enable corrective action, and quantify their contribution to global methane budgets.