铝酸三钙和石膏协同对油井水泥浆性能的影响

代丹; 王义昕; 邹亦玮; 孙超; 马英; 宋鑫君

doi:10.12358/j.issn.1001-5620.2025.02.014

铝酸三钙和石膏协同对油井水泥浆性能的影响

doi: 10.12358/j.issn.1001-5620.2025.02.014

代丹^1,,
王义昕¹,
邹亦玮¹,
孙超¹,
马英^2, ,,
宋鑫君³

1.
中海油田服务股份有限公司油田化学研究所, 河北燕郊 065201
2.
南京工业大学材料科学与工程学院, 南京 211816
3.
江西省建材科研设计院有限公司, 南昌 330001

基金项目: 中海油服揭榜挂帅项目“海水基固井关键外加剂的开发与机理研究”（YHB23YF004）。

详细信息

作者简介:
代丹，高级工程师，1981年生，研究方向为油井水泥及外加剂研发。E-mail：daidan@cosl.com.cn

通讯作者:
马英，博士，副教授，1990年生，研究方向为胶凝材料。E-mail：maying@njtech.edu.cn。

中图分类号: TE256
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出版历程
- 收稿日期: 2024-12-20
- 修回日期: 2025-01-24
- 刊出日期: 2025-04-17

Synergistic Effects of Tricalcium Aluminate and Gypsum on Performance of Oil Well Cement Slurries

DAI Dan^1
,,
WANG Yixin¹,
ZOU Yiwei¹,
SUN Chao¹,
MA Ying^{2
, ,},
SONG Xinjun³

1.
COSL Oilfield Chemical Research Institute, Yanjiao, Hebei 065201
2.
College of Materials Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816
3.
Jiangxi Province Building Materials Research and Design Institute Co., Nanchang, Jiangxi 330001

摘要

摘要: 为促进油井水泥质量控制，采用不同铝酸三钙（C₃A）含量的G级油井水泥熟料与不同种类石膏匹配，研究了在80℃下油井水泥中C₃A与石膏协同对水泥浆凝结时间、稠化性能、抗压强度、渗透率和水化产物的影响。结果表明，80℃下，水泥中C₃A含量越高，凝结和稠化时间越短，高C₃A含量有利于水泥石早期强度提升，但会导致后期强度倒缩，油井水泥中C₃A含量宜严格控制在3%以内。石膏促进水泥浆的凝结时间，其作用效果为二水石膏>半水石膏>无水石膏，相比于无水和半水石膏，二水石膏使掺有缓凝剂H42L的水泥浆稠化时间更长，且更有利于水泥石抗压强度的发展。80℃下，C₃A和二水石膏协同对早期硅酸钙矿相水化具有促进作用，C₃A相水化主要生成C₃AH₆，其生成量与C₃A含量和石膏种类密切相关。该研究结果对油井水泥质量稳定性控制和改善固井质量具有重要的理论和参考意义。
- G级油井水泥 /
- C₃A /
- 石膏 /
- 稠化性能 /
- 抗压强度
Abstract: To better control the quality of oil well cement, class G cement clinkers with different contents of tricalcium aluminate (C₃A) were mixed with different kinds of gypsums, and study was conducted on the synergistic effects of C₃A and gypsum on the gelling time, thickening property, compressive strength, permeability and hydration products of the cement at 80℃. It was found that at this temperature, the higher the C₃A content, the shorter the gelling time and thickening time of the cement. High C₃A content is beneficial to the enhancement of the early strength of the set cement, the disadvantage of this is that the strength of the set cement in later stage will have a negative growth. To avoid this deficiency, the C₃A content in a cement should be controlled to less than 3%. Gypsum in the cement helps extend the gelling time of the cement, in this way the dihydrate gypsum is better than bassanite, and bassanite is in turn better than anhydrite. Compared with bassanite and anhydrite, dihydrate gypsum can extend the thickening time of the H42L (a retarder) treated cement slurry much longer, and the use of dihydrate gypsum is much more beneficial to the development of the compressive strength of set cement. At 80℃, the synergistic action between C₃A and dihydrate gypsum promoted the hydration of calcium silicate’s early stage mineral phase, the hydration product of C₃A was mainly C₃AH₆, the amount of which produced was closely related to the content of C₃A in the cement and the types of gypsum. The results of this study are of theoretical and referential importance to the control of the quality stability of oil well cement and to the quality improvement of well cementing operation.
- Class G oil well cement /
- C₃A /
- Gypsum /
- Thickening property /
- Compressive strength

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图 1 油井水泥熟料与天然二水石膏的粒径分析

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图 2 C₃A与石膏协同对油井水泥浆　稠化性能的影响（80℃）

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图 3 C₃A与石膏协同对掺缓凝剂H42L油井水泥浆稠化性能的影响（80℃）

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图 4 C₃A与石膏协同对水泥石抗压强度的影响（80℃）

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图 5 C₃A与石膏协同对油井水泥浆水化产物的影响

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表 1 G级HSR油井水泥熟料和二水石膏的化学成分（%）

组分	CaO	SiO₂	Al₂O₃	Fe₂O₃	SO₃	MgO	K₂O	Na₂O	TiO₂	LOI
C1熟料	62.35	22.34	3.73	4.95	0.46	4.16	0.66	0.14	0.19	0.34
C3熟料	62.24	21.33	4.57	5.81	0.59	2.91	0.72	0.31	0.44	1.11
二水石膏	31.75	2.72	1.02	0.28	41.27	0.98	0.10		0.03	21.64

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表 2 G级HSR油井水泥熟料矿相含量（XRD-Rietveld法）（%）

矿物组分	C₃S	C₂S	C₃A	C₄AF
C1熟料	50.21	24.8	1.47	15.50
C2*熟料	50.51	24.1	2.74	16.51
C3熟料	50.78	23.4	4.00	17.51
注：C2*熟料由50%C1和50%C3掺混获得。

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表 3 C₃A与石膏协同对油井水泥浆密度、　　流动度和凝结时间的影响（80℃）

组别	ρ/ g/cm³	流动度/ cm	初凝时间/ min	终凝时间/ min
C1	1.952	15.9	130	150
C1-G	1.959	15.6	105	120
C1-Hemi CS	1.934	15.8	115	135
C1-CS	1.922	15.5	125	145
C2	1.951	15.8	130	145
C2-G	1.941	16.4	100	115
C2-Hemi CS	1.915	15.5	105	125
C2-CS	1.890	16.5	110	135
C3	1.925	16.4	120	140
C3-G	1.914	17.5	95	110
C3-Hemi CS	1.933	17.2	100	120
C3-CS	1.925	16.8	110	130

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表 4 C₃A与石膏协同对油井水泥石渗透率的影响

组别	渗透率/mD
组别	1 d	7 d	28 d
C1-G	3.63	4.27	1.84
C1-Hemi CS	1.49	3.84	1.49
C1-CS	1.49	1.41	1.31
C2-G	3.71	4.10	1.60
C2-Hemi CS	1.63	3.78	1.44
C2-CS	1.55	1.52	1.50
C3-G	2.63	4.77	1.72
C3-Hemi CS	1.91	4.32	1.58
C3-CS	1.78	1.70	1.66

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参考文献(16)

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