In the context of China's carbon peaking and carbon neutrality objectives,the issue of methane emission from storage tanks in the upstream oilfield gathering and transportation station has garnered widespread attention.Current methodologies for estimating methane emission from these storage tanks are prone to significant errors due to the reliance on models with large uncertainties and the randomness associated with sampling monitoring,leading to unreliable results.Our research employed advanced organic gas monitors to conduct continuous monitoring and analysis of typical storage tanks at gathering and transportation station,focusing on tank breathing and methane emission.The results revealed:(1)significant breathing and methane emission were observed from dome roof tanks,especially those without gas recovery system,with the maximum daily breathing volume reaching 97.7 m3/d and maximum daily methane emission at 83.05 m3/d.In contrast,dome roof tanks equipped with gas recovery system showed a daily breathing volume of＜1.0 m3 and methane emission of ≤0.2 m3/d.The installation of energy-saving breathing valves reduced the breathing volume and methane emission of dome roof tanks to 20.9％and 9.6％of their original levels,respectively,while floating roof tanks exhibited negligible methane emission.(2)The daily and seasonal patterns of tank breathing at gathering and transportation station were pronounced.The breathing activity of dome roof tanks was concentrated between 12:00 and 18:00,with a significant increase in breathing volume during the hot season.
关键词
甲烷排放/逸散排放/油田集输站库/在线监测
Key words
methane emission/fugitive emission/oilfield gathering and transportation station/on-line monitoring
维普
万方数据