This data-file looks through 35 different technical papers and data-sources to tabulate the methane leaks from different components around the oil and gas industry.
The largest leaks per event are from losses of well control, which can emit 10-1M tons per annum. Next are mid- and downstrseam facilities at 1-10kTpa.
The largest leaks by upstream component are compressor seals (1-100Tpa) and millons of pneumatic devices (0.01-10Tpa), which each comprise c20-30% of total upstream leaks.
Potentially overlooked categories include wellheads, storage tanks and workover practices. All are quantified in the data-file. The theme is addressed in detail in our note, mitigating methane.