来自科罗拉多州废弃的石油和天然气井的甲排放
Stuart N Riddick1, Mercy Mbua1, Arthur Santos1
1The Energy Institute, Colorado State University, CO, USA.
The Science of the total environment
|February 17, 2024
概括
废弃石油和天然气井的最新排放因子显示出大量的甲排放,特别是来自新发现的井型. 这一发现影响了国家甲库存,并强调了对石油和天然气生产的修订估计的必要性.
科学领域:
- 环境科学 环境科学
- 地质科学是地球科学.
- 大气化学 大气化学
背景情况:
- 目前的甲排放量库存依赖于具有潜在区域差异的排放因子.
- 废弃井的美国环保署排放因子是基于历史数据,可能不反映最近的废弃做法.
研究的目的:
- 评估最近废弃的石油和天然气井的现有排放因子的代表性.
- 测量来自科罗拉多州一系列废弃井的甲排放量.
- 更新废弃井的国家甲排放因子.
主要方法:
- 甲排放量从科罗拉多州的128个被堵塞和206个未被堵塞的废弃井被测量出来.
- 数据与其他州的测量数据相结合,以更新美国的排放因子.
- 确定并分析了一个新类别的最近生产的孤儿井.
主要成果:
- 确定了第一个超级发射废弃井 (76公斤CH4井-1h-1).
- 更新的平均排放因子为1gCH4井-1h-1用于插入的井和198gCH4井-1h-1用于未插入的井.
- 新发现的最近生产的孤儿井占废井甲排放总量的74%.
结论:
- 废弃井甲排放量明显高于以前使用更新的因素估计的水平.
- 废弃井的排放可能占美国石油和天然气生产总排放量的22-49%.
- 修订的库存方法对于准确的甲排放跟踪至关重要.
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