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Hou Pan, Li Xin, Wen Lijuan, et al.A high-strength elastic-tough cement slurry system and its application in coalbed methane horizontal well cementing[J]. Drilling Fluid & Completion Fluid，2026, 43（4）：542-549 doi: 10.12358/j.issn.1001-5620.2026.04.013
Citation: Hou Pan, Li Xin, Wen Lijuan, et al.A high-strength elastic-tough cement slurry system and its application in coalbed methane horizontal well cementing[J]. Drilling Fluid & Completion Fluid，2026, 43（4）：542-549 doi: 10.12358/j.issn.1001-5620.2026.04.013
shu

A High-strength Elastic-tough Cement Slurry System and Its Application in Coalbed Methane Horizontal Well Cementing

doi: 10.12358/j.issn.1001-5620.2026.04.013
  • 1.

    Xinjiang Yaxin Coalbed Methane Exploration and Development Co., Ltd., Urumqi, Xinjiang 830000

  • 2.

    Xinjiang Yaxin Coalbed Methane Resource Technology Research Co., Ltd., Urumqi, Xinjiang 830000

  • Received Date: 2026-02-20
  • Rev Recd Date: 2026-04-01
    • Available Online: 2026-07-16
    Abstract
  • Coalbed methane horizontal well cementing requires the cement stone to possess not only high strength but also good elasticity and toughness. A high-strength elastic-tough cement slurry system was developed by synthesizing a polymer microsphere material TRF with a core-shell structure, which was rigid outside and elastic inside, as an elastic-tough additive. The research results showed that this cement slurry system had a 75% increase in flexural strength, an 8.8% decrease in compressive strength, and a 38% reduction in elastic modulus after 48 h. It exhibited superior impact resistance performance to other toughening agent systems. After 14 days, the static compressive strength, dynamic strength, and absorption energy were increased by 96.12%, 115.16%, and 355.87%, respectively. The bonding performance was good, with a 29.4% increase in bonding strength at interface I and a 43.1% increase at interface Ⅱ. The anti-channeling performance was excellent. The pore pressure curve decreased smoothly without rebound, and the transition time of the static gel curve was short (only 5.5 min), representing an 82% reduction. This cement slurry system was successfully applied in Well BaiZ15-L1 in the Baicheng coalbed methane block, achieving excellent cementing quality in the horizontal well section, with bonding quality enhanced markedly at interfaces I and Ⅱ in comparison with offset wells. This high-strength elastic-tough cement slurry system met the requirements for coalbed methane horizontal well cementing.

     

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