厄瓜多尔A级低渗早强油井水泥浆优化设计

田国强

doi:10.12358/j.issn.1001-5620.2023.01.015

厄瓜多尔A级低渗早强油井水泥浆优化设计

doi: 10.12358/j.issn.1001-5620.2023.01.015

田国强

中国石油川庆钻探工程有限公司长庆固井公司, 西安 710021

详细信息

作者简介:
田国强，现在主要从事固井技术研究与应用工作。电话18391443855；E-mail：549607235@qq.com

中图分类号: TE256.6
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出版历程
- 收稿日期: 2022-09-21
- 修回日期: 2022-10-28
- 刊出日期: 2023-01-31

Optimized Design of Class A Low Permeability Early Strength Oil Well Cement Surry

TIAN Guoqiang

Changqing Well Cementing Company, ChuanQing Drilling Engineering Limited, CNPC, Xi’an, Shaanxi 710021

摘要

摘要: 为解决厄瓜多尔A级水泥适应温度、深度范围窄、初始稠度大、可泵性差的难点，开展基于A级水泥的水泥浆配方优化设计研究。通过对A级油井水泥成分分析，水泥密度、细度和比表面积等测试，并开展了其水泥浆稠化性能和抗污染实验，优选出了基于厄瓜多尔低渗、早强和适应范围更广的水泥浆体系。结果表明，A级水泥比表面积为4100～4500 cm³/g，Na₂O含量为0.47%；A级水泥浆体系适用范围可达65 ℃，10 h的抗压强度均能达到3.5 MPa，渗透率为0.1936 mD，体积收缩率为0.03%。该水泥浆体系在MARIANN-78井技术套管固井施工中进行了应用，CBL/VDL测井结果显示固井质量为优质，显著改善了厄瓜多尔A级油井水泥的性能。
- 固井 /
- A级油井水泥 /
- 比表面积 /
- 低渗早强 /
- 体积收缩
Abstract: The class a cement used in the Ecuador project has several disadvantages such as narrow temperature and formation depth ranges in which the cement can be used normally, high initial consistency and poor pumpability etc. To solve these problems, study was conducted to optimize the class a cement slurry composition. a new cement slurry was developed as a result of the study. Laboratory experimental results show that the class a cement has specific area of 4100 - 4500 cm²/g and Na₂O content of 0.47%. The upper limit of working temperature of the class a cement slurry is 65 ℃, the 10 h compressive strength of the cement slurry can reach 3.5 MPa, and the set cement has permeability of 0.1936 mD and percent volumetric shrinking of 0.03%. This new cement slurry was used to cement the technical casing of the well Mariann-78. CBL/VDL well logging data show that the quality of the cementing job is excellent; the performance of the class a cement slurry used in the Ecuador project has been significantly improved.
- Well cementation /
- Class A oil well cement /
- Specific surface area /
- Low permeability and early strength /
- Volumetric shrinking

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图 1 技术套管领浆早强水泥浆稠化曲线

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图 4 技术套管尾浆水泥浆静胶凝强度曲线

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图 2 技术套管领浆早强水泥浆静胶凝强度曲线

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图 3 技术套管尾浆水泥浆稠化曲线

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图 5 技术套管领浆污染后的稠化曲线

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图 6 技术套管领浆污染后的静胶凝强度曲线

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图 7 MARIANN-78井Φ244.4 mm技术套管领浆CBL/VDL测井解释

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图 8 MARIANN-78井Φ244.4 mm技术套管尾浆CBL/VDL测井解释

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表 1 不同厂家水泥的化学成分 %

水泥厂家	烧失量	SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	SO₃	Na₂O	K₂O	TiO₂	合计
UNACEM A级	1.00	29.40	7.39	4.01	51.39	2.20	2.41	0.47	0.46	0.30	99.03
HOLCIM A级	1.46	27.10	7.47	4.00	54.34	1.59	2.24	1.30	0.10	0.02	99.62
德国 G级	0.98	20.42	3.52	5.57	62.92	4.12	1.98	0.20	0.08	0.01	99.80

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表 2 不同水泥石在不同温度下养护不同时间的抗压强度

水泥厂家	不同温度（℃）水泥石的抗压强度/MPa
	1 d				3 d				7 d				28 d
	25	45	65	85	25	45	65	85	25	45	65	85	25	45	65	85
UNACEM A级	13.0	16.4	17.3	18.7	21.3	22.5	22.8	23.3	26.2	27.3	27.9	28.2	32.4	32.7	33.1	33.5
HOLCIM A级	9.0	15.7	16.8	17.4	16.2	17.4	18.2	18.8	25.3	26.1	26.4	26.3	25.5	26.3	26.2	26.3
德国 G级	12.3	14.4	15.6	16.5	21.5	22.6	23.4	24.6	27.4	28.5	29.4	29.7	30.4	30.6	31.2	31.3

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表 3 不同水泥石在不同温度下养护不同时间的体积收缩率

水泥厂家	不同温度（℃）水泥石的体积收缩率/%
	1 d				3 d				7 d				28 d
	25	45	65	85	25	45	65	85	25	45	65	85	25	45	65	85
UNACEM A级	0.01	0.01	0.02	0.02	0.01	0.01	0.02	0.02	0.02	0.02	0.02	0.03	0.02	0.03	0.02	0.03
HOLCIM A级	−2.04	−2.19	−2.84	−3.45	−2.45	−2.87	−3.08	−3.87	−4.16	−4.21	−4.35	−4.6	−4.54	−4.58	−4.58	−4.6
德国 G级	−1.03	−1.14	−1.44	−1.87	−1.86	−1.93	−2.03	−2.15	−2.54	−2.63	−2.72	−2.8	−2.73	−2.76	−2.78	−2.8

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表 4 不同厂家生产的水泥配浆后的基本性能

水泥厂家	ρ_水泥浆/ g·cm^-3	初始稠度/ Bc	t_稠化/ min	FL/ mL	p/MPa		渗透率/ mD	膨胀率/ %
水泥厂家	ρ_水泥浆/ g·cm^-3	初始稠度/ Bc	t_稠化/ min	FL/ mL	8 h	24 h	渗透率/ mD	膨胀率/ %
UNACEM A级	1.80	55	45	1368	4.5	16.1	0.1936	0.03
HOLCIM A级	1.80	38	61	1628	3.8	15.4	0.2553	−4.60
德国 G级	1.89	30	111	1160	3.6	14.2	0.1896	−2.80
注：水泥浆的滤失量的测试条件为30 min、6.9 MPa；稠化时间的测试温度为45 ℃；抗压强度的养护温度为38 ℃

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表 5 技术套管领浆配方及性能

水固比	ρ/g·cm⁻³	游离水/ %	FL/ mL	p/ MPa	初始稠度/Bc	t_稠化/ min
0.88	1.56	0.10	113	12.2	10	331
注：稠化时间的测试条件为65 ℃、32 MPa，抗压强度的测试条件为80 ℃、23 h

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表 6 技术套管尾浆配方及性能

水泥	水固比	ρ/ g·cm⁻³	析水/ mL	FL_API/ mL	p/ MPa	初始稠度/Bc	t_稠化/ min
A	0.41	1.87	0	48	23.85	21	215

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表 7 技术套管领浆污染流变性测试

钻井液∶隔离液∶水泥浆	φ₆₀₀	φ₃₀₀	φ₂₀₀	φ₁₀₀	φ₆	φ₃	PV/mPa·s	YP/Pa
100∶0∶0	136	75	59	44	15	10	61	7.2
95∶5∶0	125	90	74	54	15	10	35	28.1
75∶25∶0							0	0
50∶50∶0	155	101	78	51	15	14	54	24.1
25∶75∶0							0	0
5∶95∶0							0	0
0∶100∶0	200	137	106	72	11	5	63	37.8
0∶95∶5								0
0∶75∶25								0
0∶50∶50	121	70	54	29	3	2	51	9.7
0∶25∶75	100	64	47	31	8	7	36	14.3
0∶5∶95	132	92	74	52	19	16	40	26.6
0∶0∶100	43	24	16	9	1	0	19	2.6
25∶50∶25	91	65	43	33	11	6	26	19.9
注：测试温度为65 ℃

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