摘要：Aggressive reductions of oil and gas sector methane, a potent greenhouse gas, have been proposed in Canada.Few large-scale measurement studies have been conducted to confirm a baseline.This study used a vehicle-based gas monitoring system to measure fugitive and vented gas emissions across Lloydminster (heavy oil), Peace River (heavy oil/bitumen), and Medicine Hat (conventional gas) developments in Alberta, Canada.Four gases (CO 2 , CH 4 , H 2 S, C 2 H 6 ), and isotopic δ 13 C CH450% of the time when sampled downwind.Emission occurrences and rates were highest in Lloydminster, where 40.8% of sampled well pads were estimated to be emitting methane-rich gas above our minimum detection limits (m = 9.73 m 3 d –1 ).Of the well pads we found to be persistently emitting in Lloydminster, an estimated 40.2% (95% CI: 32.2%–49.4%) emitted above the venting threshold in which emissions mitigation under federal regulations would be required.As a result of measured emissions being larger than those reported in government inventories, this study suggests government estimates of infrastructure affected by incoming regulations may be conservative.Comparing emission intensities with available Canadian-based research suggests good general agreement between studies, regardless of the measurement methodology used for detection and quantification.This study also demonstrates the effectiveness in applying a gaussian dispersion model to continuous mobile-sourced emissions data as a first-order leak detection and repair screening methodology for meeting regulatory compliance.
关键词：Methane;Fugitive and vented emission;Monitoring;Oil and gas;Vehicle-based;Regulation;
