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Advances in Earth Science >

2024 , Vol. 39 >Issue 7: 717 - 725

DOI: https://doi.org/10.11867/j.issn.1001-8166.2024.035

Estimation of Combustion Efficiency and Methane Emissions from Oil and Gas Platform Flarings Based on in Situ Observed Data from the Bohai Sea

  • Kunpeng ZANG ,
  • Xiaolong SHEN ,
  • Kangxuan WEI ,
  • Jun WEN ,
  • Fengmei PAN ,
  • Honghui XU ,
  • Yujun JIANG
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  • 1.Zhejiang Innovative Institute of Carbon Neutrality, Zhejiang University of Technology, Hangzhou 310014, China
    2.College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
    3.National Marine Environmental Monitoring Center, Dalian Liaoning 116023, China
    4.Zhejiang Meteorological Science Institute, Hangzhou 310008, China
ZANG Kunpeng, Associate professor, research area includes observation and estimation of greenhouse gases. E-mail: zangkunpeng@zjut.edu.cn

Received date: 2023-07-23

  Revised date: 2023-12-25

  Online published: 2024-05-14

Supported by

the National Key Research and Development Program of China(2020YFA0607501);The Joint Funds of the Zhejiang Provincal Natural Science Foundation of China(LZJMZ23D050002);The Basic Public Welfare Research Program of Zhejiang Province(LGF22D050004)

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Abstract

Based on the reanalysis of ship-borne continuous data observed in 2012 and 2014 and “bottom-up” and “top-down” approaches, the combustion efficiency and CH4 emission rate of flaring equipped on oil and gas platforms in the Penglai Region of the Bohai Sea were studied. The results showed that peak atmospheric CO2 and CH4 mixing ratios of approximately (11~20)×10-6 and (100~260)×10-9 were observed in the downwind area of flaring. The calculated combustion efficiency of associated gas flaring was (97.8±1.1)%, which was better than that in most countries worldwide. The CH4 emission rates of flaring equipped on the oil and gas platforms were 3.6~6.1 Gg/a and 1.80~2.68 Gg/a, estimated using the “bottom-up” and “top-down” approaches, respectively, indicating that the flaring was the primary source of atmospheric CH4. On the other hand, the difference in the results estimated by the “bottom-up” and “top-down” approaches was still remarkable, mostly due to the limited spatiotemporal representation of emission factors and observation data. This study is beneficial for promoting the recycling and reuse of associated gas and reducing CH4 emissions from marine oil and gas exploitation in China.

Key words： Bohai Sea; Oil and gas platform; Flare; Methane; Top-down approach

Cite this article

Kunpeng ZANG , Xiaolong SHEN , Kangxuan WEI , Jun WEN , Fengmei PAN , Honghui XU , Yujun JIANG . Estimation of Combustion Efficiency and Methane Emissions from Oil and Gas Platform Flarings Based on in Situ Observed Data from the Bohai Sea[J]. Advances in Earth Science, 2024 , 39(7) : 717 -725 . DOI: 10.11867/j.issn.1001-8166.2024.035

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