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石油和天然气行业温室气体排放报告背景技术支持文件GREENHOUSE GAS EMISSIONS REPORTING FROM THE PETROLEUM AND NATURAL GAS INDUS 石油和天然气行业温室气体排放报告背景技术支持文件GREENHOUSE GAS EMISSIONS REPORTING FROM THE PETROLEUM AND NATURAL GAS INDUS

石油和天然气行业温室气体排放报告背景技术支持文件GREENHOUSE GAS EMISSIONS REPORTING FROM THE PETROLEUM AND NATURAL GAS INDUS

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美国温室气体清单中低估的排放量被公开修订。 除了原油 冷凝水储存罐和火炬，以及洗涤器卸料阀。4.对 在EPA-HQ-OAR中发现的“油箱排放分析”中提供了储油罐。 2009-0923-0002文档，但修订的排放量未包括在此分析中 （详情见附录C）。关于包括洗涤器的进一步讨论 本规则制定中的自卸阀，请参阅EPA中的“洗涤自卸阀”分析。 总部-OAR-2009-0923文件。环境保护局只有有限的公开信息才能准确获得。 修订国家一级的燃烧和洗涤器自卸阀估算值。在岸上 燃烧排放，EPA使用温室气体清单的排放估计 基于环保署认为被低估的环评数据。参见 进一步的细节。这将在下面进一步解释。附录B提供了详细信息 讨论如何为四个被低估的每个开发新的估计 来源。表1提供了从EPA/GRI获得的排放因子的比较 研究并在本文件中修改。表2提供了 美国温室气体清单中列出的天然气工业的每个部分，以及 基于四个低估来源的修正估计计算。

The understatement of emissions in the U.S. GHG Inventory were revised using publicly available information for all sources and included in the analysis, except crude oil and condensate storage tanks and flares, and scrubber dump valves.4 The revised estimates for storage tanks are available in “Analysis of Tank Emissions”, found in the EPA-HQ-OAR­ 2009-0923-0002 docket, but the revised emissions have not been included in this analysis (See Appendix C for further details). For further discussion on the inclusion of scrubber dump valves in this rulemaking please see the analysis “Scrubber Dump Valves” in EPA­ HQ-OAR-2009-0923 docket. EPA has limited publicly available information to accurately revise estimates on a national level for flaring and scrubber dump valves. For onshore combustion emissions, EPA used emissions estimates from the GHG inventory which are based on EIA data which EPA believes to be underestimated. Refer to section 4(c)(iii) of the TSD for further details. This is explained further below. Appendix B provides a detailed discussion on how new estimates were developed for each of the four underestimated sources. Table 1 provides a comparison of emissions factors as available from the EPA/GRI study and as revised in this document. Table 2 provides a comparison of emissions from each segment of the natural gas industry as available in the U.S. GHG Inventory and as calculated based on the revised estimates for the four underestimated sources.

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