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Feed me oil 2 chapter 65/26/2023 ![]() According to the official United States (US) GHG inventory, CH 4 from O&NG operations are estimated to contribute ~3% of national GHG emissions (with 100 year GWP = 25, 2). During production of oil and natural gas (O&NG), some processes are designed to vent CH 4 to the air, and CH 4 is also emitted unintentionally via leaks in the system. Methane (CH 4) is the principal constituent of natural gas and is also a potent greenhouse gas (GHG) 1. If our proposed method were adopted in the United States and other jurisdictions, inventory estimates could better guide CH 4 mitigation policy priorities. We find that unintentional emissions from liquid storage tanks and other equipment leaks are the largest contributors to divergence with the GHGI. ![]() ![]() ![]() Based on an updated synthesis of measurements from component-level field studies, we develop a new inventory-based model for CH 4 emissions, for the production-segment only, that agrees within error with recent syntheses of site-level field studies and allows for isolation of equipment-level contributions. In the United States, recent synthesis studies of field measurements of CH 4 emissions at different spatial scales are ~1.5–2× greater compared to official greenhouse gas inventory (GHGI) estimates, with the production-segment as the dominant contributor to this divergence. Methane (CH 4) emissions from oil and natural gas (O&NG) systems are an important contributor to greenhouse gas emissions.
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