Multiple recent studies have characterized methane emissions from the O&G sector, primarily focusing on emissions in production basins. Broadly, these studies indicate a tendency for inventories to underestimate emissions relative to facility-scale or regional estimates of emissions. The persistent disagreement between inventories and measurement-based estimates has placed additional focus on changing traditional inventory methods to improve emission estimates. New regulatory measures that include methane fees, coupled with public commitments by companies to environmental, social and governance (ESG) programs, have also raised pressure on inventories to produce accurate and defensible results.