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Assessment of Uinta Basin Oil and Natural Gas Well Pad Pneumatic Controller Emissions

Journal of Environmental Protection 2017年第4期8卷 394-415页

作者： Eben D. Thoma Parikshit Deshmukh Russell Logan Michael Stovern chris dresser Halley L. Brantley Office of Research and Development National Risk Management Research Laboratory U.S. EPA Durham NC USA Jacobs Technology Inc. Durham NC USA Region 8 U.S. EPA Denver CO USA ORISE Participant U.S. EPA Office of Research and Development National Risk Management Research Laboratory Durham NC USA

In the fall of 2016, a field study was conducted in the Uinta Basin Utah to improve information on oil and natural gas well pad pneumatic controllers (PCs) and emission measurement methods. A total of 80 PC systems at five oil sites (supporting six wells) and three gas sites (supporting 12 wells) were surveyed, and emissions data were produced using a combination of measurements and engineering emission estimates. Ninety-six percent of the PCs surveyed were low actuation frequency intermittent vent type. The overall whole gas emission rate for the study was estimated at 0.36 scf/h with the majority of emissions occurring from three continuous vent PCs (1.1 scf/h average) and eleven (14%) malfunctioning intermittent vent PC systems (1.6 scf/h average). Oil sites employed, on average 10.3 PC systems per well compared to 1.5 for gas sites. Oil and gas sites had group average PC emission rates of 0.28 scf/h and 0.67 scf/h, respectively. This difference was due in part to differing site selection procedures used for oil and gas sites. The PC system types encountered, the engineering emissions estimate approach, and comparisons to measurements are described. Survey methods included identification of malfunctioning PC systems and emission measurements with augmented high volume sampling and installed mass flow meters, each providing a somewhat different representation of emissions that are elucidated through example cases.

关键词： Pneumatic Controller Emissions Oil and Natural Gas Production Uinta Basin Methane Volatile Organic Compounds

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