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Predictive Modeling of Energy and Emissions from Shale Gas Development

机译：页岩气开发的能量和排放的预测模型

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摘要

Contributions of individual preproduction activities to overall energy use and greenhouse gas (GHG) emissions during shale gas development are not well understood nor quantified. This paper uses predictive modeling combining the physics of reservoir development operations with depositional attributes of shale gas basins to account for energy requirements and GHG emissions during shale gas well development. We focus on shale gas development from the Montney basin in Canada and account for the energy use during drilling and fluid pumping for reservoir stimulation, in addition to preproduction emissions arising from energy use and potential gas releases during operations. Detailed modeling of activities and events that take place during each stage of development is described. Relative to the hydraulic fracturing activity, we observe significantly higher energy intensity for the well drilling and mud circulation activities. Well completion flowback gas is found to be the predominant potential source of GHG emission. When these results are expressed on an annual basis, consistent with the convention of most climate policy goals and directives, environmental impacts of our growing natural gas economy are better appreciated. Estimated likely GHG emission from new development wells in 2017 in the Montney Formation alone is 2.68 Mt CO(2)e. However, on a preproduction requirements basis and dependent on mean estimated ultimate recovery (EUR), energy return on invested energy for shale gas from the Montney Formation in Canada is estimated to be about 3400. The approach described here can be reliably extended to areas, globally, where natural gas development is becoming prominent.
机译：页岩气开发过程中，各个生产前活动对总体能源使用和温室气体（GHG）排放的贡献尚未得到很好的理解或量化。本文采用预测模型，将储层开发作业的物理性质与页岩气盆地的沉积属性相结合，以解释页岩气井开发过程中的能源需求和温室气体排放。我们专注于加拿大Montney盆地的页岩气开发，并在钻井和抽油以刺激储层的过程中消耗了能源，此外还考虑了能源消耗和生产过程中潜在的天然气释放所产生的生产前排放。描述了在每个开发阶段发生的活动和事件的详细建模。相对于水力压裂活动，我们在钻井和泥浆循环活动中观察到明显更高的能量强度。发现完井返排气体是温室气体排放的主要潜在来源。当这些结果以大多数气候政策目标和指令的惯例每年发布一次时，我们日益增长的天然气经济对环境的影响将得到更好的理解。仅在Montney组中，2017年新开发井的估计温室气体排放量为2.68 Mt CO（2）e。但是，根据生产前需求，并取决于估计的平均最终采收率（EUR），来自加拿大蒙特尼组的页岩气投资能源的能量回报估计约为3400。这里描述的方法可以可靠地扩展到以下地区：在全球范围内，天然气的开发正变得越来越突出。

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  • 来源
    《Environmental Science & Technology》 |2018年第24期|14547-14555|共9页
  • 作者

    Umeozor Evar C.; Gates Ian D.;

  • 作者单位

    Univ Calgary, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada;

    Univ Calgary, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada;

  • 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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  • 正文语种 eng
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