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首页> 外文期刊>Environmental Science & Technology >Evaluating Methods To Estimate Methane Emissions from Oil and Gas Production Facilities Using LES Simulations
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Evaluating Methods To Estimate Methane Emissions from Oil and Gas Production Facilities Using LES Simulations

机译：利用LES模拟估算油气生产设施甲烷排放的评价方法。

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摘要

Large-eddy simulations (LES) coupled to a model that simulates methane emissions from oil and gas production facilities are used to generate realistic distributions of meteorological variables and methane concentrations. These are sampled to obtain simulated observations used to develop and evaluate source term estimation (STE) methods. A widely used EPA STE method (OTM33A) is found to provide emission estimates with little bias when averaged over six time periods and seven well pads. Sixty-four percent of the emissions estimated with OTM33A are within +/- 30% of the simulated emissions, showing a slightly larger spread than the 72% found previously using controlled release experiments. A newly developed method adopts the OTM33A sampling strategy and uses a variational or a stochastic STE approach coupled to an LES to obtain a better fit to the sampled meteorological conditions and to account for multiple sources within the well pad. This method can considerably reduce the spread of the emissions estimates compared to OTM33A (92-95% within +/- 30% percent error), but it is associated with a substantial increase in computational cost due to the LES. It thus provides an alternative when the additional costs can be afforded to obtain more precise emission estimates.
机译：大涡模拟（LES）与模拟石油和天然气生产设施中甲烷排放的模型相结合，用于生成气象变量和甲烷浓度的实际分布。对这些样本进行采样以获得用于开发和评估源术语估计（STE）方法的模拟观察结果。发现在六个时间段和七个孔垫上进行平均时，广泛使用的EPA STE方法（OTM33A）提供的排放估算值几乎没有偏差。用OTM33A估算的排放量的64％在模拟排放量的+/- 30％范围内，与以前使用控释实验发现的72％的排放量相比，显示出稍大的差异。一种新开发的方法采用OTM33A采样策略，并使用变分或随机STE方法与LES耦合，以更好地适应采样的气象条件并考虑井盖内的多种来源。与OTM33A相比，此方法可以大大减少排放估算值的散布（92％至95％的误差在+/- 30％以内），但是由于LES，它与计算成本的显着增加有关。因此，当可以支付额外费用以获得更精确的排放估算时，它提供了一种替代方法。

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  • 来源
    《Environmental Science & Technology》 |2018年第19期|11206-11214|共9页
  • 作者

    Saide Pablo E.; Steinhoff Daniel F.; Kosovic Branko; Weil Jeffrey; Downey Nicole; Blewitt Doug; Hanna Steven R.; Delle Monache Luca;

  • 作者单位

    Natl Ctr Atmospher Res, Res Applicat Lab, 3090 Ctr Green Dr, Boulder, CO 80301 USA;

    Natl Ctr Atmospher Res, Res Applicat Lab, 3090 Ctr Green Dr, Boulder, CO 80301 USA;

    Natl Ctr Atmospher Res, Res Applicat Lab, 3090 Ctr Green Dr, Boulder, CO 80301 USA;

    Natl Ctr Atmospher Res, Res Applicat Lab, 3090 Ctr Green Dr, Boulder, CO 80301 USA;

    Earth Syst Sci LLC, 117 Bryn Mawr Dr SE Suite 111, Albuquerque, NM 87106 USA;

    Earth Syst Sci LLC, 117 Bryn Mawr Dr SE Suite 111, Albuquerque, NM 87106 USA;

    Hanna Consultants, 7 Crescent Ave, Kennebunkport, ME 04046 USA;

    Natl Ctr Atmospher Res, Res Applicat Lab, 3090 Ctr Green Dr, Boulder, CO 80301 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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