Volume 43 Issue 3
Jun.  2026
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WEI Xinlong, SONG Jianjian, YU Xueqi, et al.The influence of sodium tripolyphosphate on the corrosion resistance of aluminate cement slurries under high temperature acidic environment[J]. Drilling Fluid & Completion Fluid，2026, 43（3）：388-393 doi: 10.12358/j.issn.1001-5620.2026.03.012
Citation: WEI Xinlong, SONG Jianjian, YU Xueqi, et al.The influence of sodium tripolyphosphate on the corrosion resistance of aluminate cement slurries under high temperature acidic environment[J]. Drilling Fluid & Completion Fluid，2026, 43（3）：388-393 doi: 10.12358/j.issn.1001-5620.2026.03.012
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The Influence of Sodium Tripolyphosphate on the Corrosion Resistance of Aluminate Cement Slurries under High Temperature Acidic Environment

doi: 10.12358/j.issn.1001-5620.2026.03.012
  • 1.

    School of Petroleum Engineering, Yangtze University, Wuhan, Hubei 430100

  • 2.

    Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering （Yangtze University）, Wuhan, Hubei 430100

  • 3.

    State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization（Yangtze University）, Wuhan, Hubei 430100

  • 4.

    Daqing Oilfield No.9 Production Plant, Daqing, Heilongjiang 163000

  • Received Date: 2026-01-15
  • Rev Recd Date: 2026-02-28
    • Available Online: 2026-06-12
  • Publish Date: 2026-06-12
    Abstract
  • To satisfy the requirements of cementing high-temperature sour gas wells, sodium triphosphate （STPP） was used to improve the performance of aluminate cement. In this study the effects of STPP’s concentration on the performance of aluminate cement were evaluated, the influence of STPP on the corrosion resistance of aluminate cement was investigated, and the phase composition and micromorphology of the STPP set cement were analyzed. It was found that the incorporation of STPP in a cement slurry causes the it to have a longer thickening time and lower filter loss, but higher rheological readings. A modified aluminate cement treated with 10% STPP has its 7-day compressive strength that is 22.97% longer than that of a blank aluminate cement slurry sample. In a corrosion environment of 150 ℃ and 21 MPa （partial pressure of CO2 is 80%） the cement slurry modified with 10% STPP has a 28-day compressive strength that is 67.73% higher than that of the blank cement slurry sample, and the permeability of the STPP cement slurry is reduced by 67.73%, indicating that STPP significantly improves the corrosion resistance of the aluminate cement at elevated temperatures. When STPP is incorporated into an aluminate cement, the PO43− ions it contains preferentially combine with Ca2+ ions to form stable Ca10(PO4)6(OH)2, thereby inhibiting the corrosion process. The set cement formed by this cement slurry maintains tight pore structure after CO2 corrosion, indicating that the set cement has excellent corrosion resistance. The research results provide guidance for the design of well cementing materials for deep acidic environments.

     

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