高温酸性环境下三聚磷酸钠对铝酸盐水泥浆耐腐蚀性能的影响

韦鑫龙; 宋建建; 余学奇; 祝春波; 许明标

doi:10.12358/j.issn.1001-5620.2026.03.012

高温酸性环境下三聚磷酸钠对铝酸盐水泥浆耐腐蚀性能的影响

doi: 10.12358/j.issn.1001-5620.2026.03.012

韦鑫龙^1,,
宋建建^{1, 2, 3, ,},
余学奇¹,
祝春波⁴,
许明标^{1, 2, 3}

1.
长江大学石油工程学院, 武汉430100
2.
油气钻采工程湖北省重点实验室（长江大学）, 武汉430100
3.
低碳催化与二氧化碳利用全国重点实验室（长江大学）, 武汉430100
4.
大庆油田有限责任公司第九采油厂, 黑龙江大庆163000

基金项目: 国家自然科学基金“高温与碳化耦合作用下高密度固井水泥石劣化机理及控制研究”（52404003）。

详细信息

作者简介:
韦鑫龙，在读硕士研究生，现在主要从事固井水泥浆技术研究工作。E-mail：2024720456@yangtzeu.edu.cn

通讯作者:
宋建建，博士，副教授，现在主要从事固井液理论与技术研究。E-mail：songjian629@yangtzeu.edu.cn。

中图分类号: TE256
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- 被引次数: 0
出版历程
- 收稿日期: 2026-01-15
- 修回日期: 2026-02-28
- 网络出版日期: 2026-06-12
- 刊出日期: 2026-06-12

The Influence of Sodium Tripolyphosphate on the Corrosion Resistance of Aluminate Cement Slurries under High Temperature Acidic Environment

WEI Xinlong^1
,,
SONG Jianjian^{1, 2, 3
, ,},
YU Xueqi¹,
ZHU Chunbo⁴,
XU Mingbiao^{1, 2, 3}

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

摘要

摘要: 为满足高温酸性气井固井需求，使用三聚磷酸钠（STPP）改进铝酸盐水泥性能。评价了不同含量的STPP对铝酸盐水泥性能的影响，并研究了STPP对铝酸盐水泥耐腐蚀性能的影响，分析了STPP水泥石的物相组成及微观形貌。结果表明，STPP的掺入会延长水泥浆的稠化时间且降低失水量，但是会引起水泥浆流变性读数增大。10%STPP改性铝酸盐水泥7 d抗压强度较空白试样的抗压强度增长22.97%。在150 ℃、21 MPa（80%CO₂分压）腐蚀环境中，10%STPP改性水泥试样腐蚀28 d后抗压强度较空白试样提高67.73%，渗透率降低59.76%，STPP对铝酸盐水泥高温下的耐腐蚀性能有明显改善效果。当STPP掺入铝酸盐水泥中，其含有的PO₄³⁻优先与Ca²⁺结合形成稳定的Ca₁₀(PO₄)₆(OH)₂，抑制了腐蚀过程，且形成的水泥石经CO₂腐蚀后仍保持致密孔隙结构，具有优异的抗腐蚀能力。研究成果为深层酸性环境固井材料设计提供了指导。
- 三聚磷酸钠 /
- 铝酸盐水泥 /
- 高温 /
- 腐蚀 /
- 二氧化碳
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.
- Sodium tripolyphosphate /
- Aluminate cement /
- High temperature /
- Corrosion /
- Carbon dioxide

HTML全文

图 1 STPP加量对水泥浆稠化时间和失水量的影响

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图 2 STPP对铝酸盐水泥抗压强度的影响

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图 3 STPP对铝酸盐水泥腐蚀后抗压强度的影响

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图 4 STPP对改性铝酸盐水泥腐蚀后渗透率的影响

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图 5 STPP改性铝酸盐水泥石XRD图谱

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图 6 空白组和STPP改性组试样腐蚀前后的微观形貌

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表 1 不同STPP掺量下水泥浆流变性能

STPP/% φ₃₀₀ φ₂₀₀ φ₁₀₀ φ₆ φ₃

0 240 166 85 9 5
5 281 195 100 17 14
10 292 203 106 33 31
15 298 209 111 37 35

下载: 导出CSV

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