ExxonMobil is progressing a comprehensive methane management programme which is on track to meet its goal of reducing methane emissions by 15% in 2020, compared to 2016.
A significant proportion of methane emissions comes from fossil fuel operations, but identifying specific sources is challenging. Studies show that a small number of high emitting leaks are responsible for the bulk of emissions, yet finding them is often expensive, logistically challenging, labour intensive, and inaccurate. Current methods to monitor oil sand mining, for example, have a degree of uncertainty of 50% or more. To effectively deal with emissions, we need to know where they are.
GHGSat has developed a satellite specifically designed to look for and monitor facility-level emissions. Launching the first demonstration satellite in 2016 and a second, commercial satellite in 2020, it uses a Fabry-Perot imaging spectrometer to measure methane concentrations at any point on earth every other day. These periodic surveys identify super-emitters at a low cost without the need for on-site equipment.
Aggregating data from its own and third-party satellites and other sources, GHGSat offers a range of commercial services including high-resolution imagery from space and aircraft, leak risk assessment, hotspot detection, and predictive analysis. To raise awareness of methane with the broader public, the company released a free online tool that shows monthly averaged methane concentrations in the atmosphere on a grid 2km x 2km over land worldwide.
The technology is delivering actionable information to emitters from a space-based spectrometer. One emission source detected in central Asia led to the operator being identified and informed via diplomatic channels, and the leak fixed. This single intervention was the equivalent of taking one million cars off the road per year.
GHGSat aims to launch its third satellite in January 2021, and a further 8 by end of 2022. Improved data availability will help to remove super-emitters and provide global policy makers with a better understanding of the problem.
What OGCI member companies are doing to reduce methane emissions
Member companies are expanding leak detection and repair campaigns, removing high-emitting devices, and reducing both flaring and venting.