Reconciling Methane Emission Measurements for Offshore Oil and Gas Platforms with Detailed Emission Inventories: Accounting for Emission Intermittency

IF 6.7 Q1 ENGINEERING, ENVIRONMENTAL ACS Environmental Au Pub Date : 2022-12-05 DOI:10.1021/acsenvironau.2c00041
Zhichao Chen, Tara I. Yacovitch, Conner Daube, Scott C. Herndon, Darcy Wilson, Stacie Enoch and David T. Allen*, 
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引用次数: 2

Abstract

Comparisons of observation-based emission estimates with emission inventories for oil and gas production operations have demonstrated that intermittency in emissions is an important factor to be accounted for in reconciling inventories with observations. Most emission inventories do not directly report data on durations of active emissions, and the variability in emissions over time must be inferred from other measurements or engineering calculations. This work examines a unique emission inventory, assembled for offshore oil and gas production platforms in federal waters of the Outer Continental Shelf (OCS) of the United States, which reports production-related sources on individual platforms, along with estimates of emission duration for individual sources. Platform specific emission rates, derived from the inventory, were compared to shipboard measurements made at 72 platforms. The reconciliation demonstrates that emission duration reporting, by source, can lead to predicted ranges in emissions that are much broader than those based on annual average emission rates. For platforms in federal waters, total emissions reported in the inventory for the matched platforms were within ∼10% of emissions estimated based on observations, depending on emission rates assumed for nondetects in the observational data set. The distributions of emissions were similar, with 75% of platform total emission rates falling between 0 and 49 kg/h for the observations and between 0.59 and 54 kg/h for the inventory.

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调和海上石油和天然气平台的甲烷排放测量与详细的排放清单:核算排放间歇性
将基于观测的排放估计数与石油和天然气生产作业的排放清单进行比较表明,排放的间歇性是核对清单与观测值时需要考虑的一个重要因素。大多数排放清单没有直接报告活动排放持续时间的数据,排放量随时间的变化必须从其他测量或工程计算中推断出来。这项工作审查了一份独特的排放清单,该清单是为美国外大陆架联邦水域的海上石油和天然气生产平台编制的,报告了各个平台上的生产相关来源,以及对各个来源的排放持续时间的估计。根据清单得出的平台比排放率与72个平台的船上测量值进行了比较。对账表明,按来源进行的排放持续时间报告可以导致预测的排放范围比基于年平均排放率的排放范围宽得多。对于联邦水域内的平台,匹配平台清单中报告的总排放量在基于观测估计的排放量的~10%以内,这取决于观测数据集中非探测假设的排放率。排放量的分布相似,75%的平台总排放率在0至49 kg/h之间,在0.59至54 kg/h之间。
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ACS Environmental Au
ACS Environmental Au 环境科学-
CiteScore
7.10
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0.00%
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0
期刊介绍: ACS Environmental Au is an open access journal which publishes experimental research and theoretical results in all aspects of environmental science and technology both pure and applied. Short letters comprehensive articles reviews and perspectives are welcome in the following areas:Alternative EnergyAnthropogenic Impacts on Atmosphere Soil or WaterBiogeochemical CyclingBiomass or Wastes as ResourcesContaminants in Aquatic and Terrestrial EnvironmentsEnvironmental Data ScienceEcotoxicology and Public HealthEnergy and ClimateEnvironmental Modeling Processes and Measurement Methods and TechnologiesEnvironmental Nanotechnology and BiotechnologyGreen ChemistryGreen Manufacturing and EngineeringRisk assessment Regulatory Frameworks and Life-Cycle AssessmentsTreatment and Resource Recovery and Waste Management
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