ESTIMATES OF METHANE EMISSIONS FROM THE
U.S. OIL INDUSTRY
The U.S. Environmental Protection Agency
The largest combustion emission source for methane among the smaller sources is offshore
platforms in the Gulf of Mexico at 0.3 Bcf per year. Since these emissions are primarily from flaring and
the engines that drive generators and compressors, the opportunities for emission reductions are limited.
Flaring is used to dispose of small gas volumes that cannot be recovered economically because of the
platform location relative to gas gathering systems. The technical potential for emission reductions are
judged to be no more than 10 percent, or 0.03 Bcf. Economically feasible emission reductions are judged
to be insignificant. These same levels of emission reduction are estimated for the remaining four
combustion sources that release an estimated total of 0.04 Bcf per year. The four sources are heaters, well
drilling, offshore platforms other than in the Gulf of Mexico, and flares. See Table F-1 of Appendix F for
estimates of emission reductions by sources and the options available for the reductions.