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Advances in Earth Science >

2020 , Vol. 35 >Issue 11: 1127 - 1136

DOI: https://doi.org/10.11867/j.issn.1001-8166.2020.092

Study on Mitigative Measures in Case of Compressor Station Outage for Gas Pipelines in Permafrost Regions

  • Xinze Li ,
  • Huijun Jin ,
  • Qingbai Wu
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  • 1.State Key Laboratory of Frozen Soils Engineering，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
    2.University of Chinese Academy of Sciences，Beijing 100049，China
    3.Sinopec Petroleum Engineering Co. ，Dongying Shandong 257000，China
    4.School of Civil Engineering/Northeast-China Observatory and Research-Station of Permafrost Geo- Environment-Ministry of Education/Institute of Cold-Regions Engineering，Science and Technology，Northeast Forestry University，Haerbin 150040，China
Li Xinze (1987-）， male， Karamay City， Xinjiang Uygur Autonomous Region， Ph.D student. Research areas include permafrost and cold engineering. E-mail：slecclxz@sina.com

Received date: 2020-09-20

  Revised date: 2020-10-31

  Online published: 2021-01-25

Supported by

the Applied Science of Sinopec Petroleum Engineering Co. ”Feasibility study on key technologies for Alaska natural gas pipeline construction”(SJ18-50J)

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Abstract

For gas pipelines in permafrost regions， it is well-known that the most serious hazards， such as differential thaw settlement and frost heave， affect the engineering foundations and the integrity of pipeline systems. However， in case of a compressor station outage， the chilled gas will bypass the outage station， flow directly to the downstream pipeline and continue the cooling due to the Joule-Thomson cooling effect. The dangerous scenario that the transporting temperature may fall to a level below the minimum design temperature has not been paid adequate attention because this kind of potential challenge has never been encountered for pipelines in temperate regions. Taking one planned gas pipeline project in permafrost regions as an example， temperature controlling strategies and feasible approaches were given on the perspective of protecting permafrost and technical measures， such as using high discharge temperature， forced flow reduction and installing extra gas heater stations， evaluated quantitatively and discussed using international hydraulic software SPS. Finally， the initial framework solutions were proposed in the hope of supplementing existing gas transporting process theory and identifying new approaches for gas pipelines in the northern and upland permafrost regions.

Key words： Permafrost regions; Natural gas pipeline; Compressor station outage; Joule-Thomson cooling effect; Minimum design metal temperature

Cite this article

Xinze Li , Huijun Jin , Qingbai Wu . Study on Mitigative Measures in Case of Compressor Station Outage for Gas Pipelines in Permafrost Regions[J]. Advances in Earth Science, 2020 , 35(11) : 1127 -1136 . DOI: 10.11867/j.issn.1001-8166.2020.092

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