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Chemistry and Technology of Fuels and Oils

, Volume 55, Issue 4, pp 483–490 | Cite as

Plugging Ability of Ice Crystals in a Low Temperature Coal Rock Fracture

  • Jia MinEmail author
  • Yang Zhaozhong
  • Zhang Yunpeng
  • Li Xiaogang
  • Zhou Nayun
Article
  • 16 Downloads

The key to temporary plugging by ice crystals in coalbed methane wells is whether sufficient ice formation plugging strength can be achieved. Ice crystal formation and plugging capacity test equipment was designed to test the plugging capacity of ice crystals in a low temperature coal rock fracture. The experimental results show that the plugging strength is above 20 MPa. The tensile strength of saturated coal rock under freezing conditions was tested by the Brazil disk split method in order to study the mechanism of sealing strength of ice crystals. The results show that the tensile strength of frozen coal increases as the temperature falls beneath 0°C. Both of these results proved that the technology of temporary plugging using ice crystals in coalbed methane wells is feasible and rational.

Keywords

Temporary plugging by ice plugging capacity tensile strength coalbed methane 

Notes

Acknowledgement

This paper is supported by Open Fund (PLNI208 ) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Fund of Personnel Office of Southwest Petroleum University, and the special fund of China 's central government for the development of local colleges and universities — the project of national first-level discipline inj)il and} as Engineering.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Jia Min
    • 1
    Email author
  • Yang Zhaozhong
    • 1
  • Zhang Yunpeng
    • 1
  • Li Xiaogang
    • 1
  • Zhou Nayun
    • 1
  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengduChina

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