分散聚合法制备固井降失水剂及性能研究

邹亦玮; 王义昕; 朱思佳; 宋维凯; 罗宇维; 汤雨霖

doi:10.12358/j.issn.1001-5620.2024.06.012

分散聚合法制备固井降失水剂及性能研究

doi: 10.12358/j.issn.1001-5620.2024.06.012

邹亦玮^{1, 2,},
王义昕^{1, 2},
朱思佳^{1, 2},
宋维凯^{1, 2},
罗宇维^{1, 2},
汤雨霖^{1, 2}

1.
中海油田服务股份有限公司, 河北廊坊065201
2.
中国海洋石油集团有限公司海上钻完井液与固井重点实验室, 河北廊坊065201

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）部分研究成果。

详细信息

作者简介:
邹亦玮，工程师，主要从事固井技术研究和固井材料研发。E-mail：zouyw2@cnooc.com.cn

中图分类号: TE256
计量
- 文章访问数: 150
- HTML全文浏览量: 50
- PDF下载量: 41
- 被引次数: 0
出版历程
- 收稿日期: 2024-07-11
- 修回日期: 2024-08-21
- 刊出日期: 2024-11-30

Preparation and Performance Evaluation of Well cementing Fluid Loss Additive by Dispersion Polymerization Method

ZOU Yiwei^{1, 2
,},
WANG Yixin^{1, 2},
ZHU Sijia^{1, 2},
SONG Weikai^{1, 2},
LUO Yuwei^{1, 2},
TANG Yulin^{1, 2}

1.
China Oilfield Services Limited, Langfang, Hebei 065201
2.
CNOOC Key Laboratory of Offshore Drilling Fluids and Cementing, Langfang, Hebei 065201

摘要

摘要: 针对水溶液聚合以及反相乳液聚合的弊端，首次报道了一种通过分散聚合制备固井降失水剂C-FL72L的方法。其中，以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、富马酸(FA)、N,N-二甲基丙烯酰胺(DMA)为聚合单体，季戊四醇三烯丙基醚(APE)为交联剂，聚乙烯吡咯烷酮（PVP-K30）为稳定剂，固含量为33%。对分散聚合的反应动力学进行了考察，反应4 h转化率可达98.9%。通过红外光谱测试、热重分析、高效液相色谱分析、凝胶渗透色谱分析等表征手段，表明所有单体充分且完全聚合，降失水剂耐温超过300 ℃，分子量可达77.2万。对样品在水泥浆中的应用性能进行了评价，在210 ℃下，可将失水控制在50 mL以内，水泥浆流变性能、稠化性能、抗压强度等水泥浆综合工程性能良好。并对使用新合成方法制备的降失水剂的作用机理进行了探讨。降失水剂C-FL72L在高密度、低密度、树脂、胶乳、盐水等功能水泥浆体系中综合应用性能优异，有着广阔的应用前景。
- 固井 /
- 油井水泥 /
- 降失水剂 /
- 分散聚合 /
- 控失水 /
- 高温高压
Abstract: In view of the disadvantages of aqueous solution polymerization and inverse emulsion polymerization, herein we report for the first time preparation of a cementing fluid loss additive C-FL72L through dispersion polymerization, in which acrylamide (AM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), fumaric acid (FA), N,N-dimethylacrylamide (DMA) are used as monomers, pentaerythritoltriallyl ether is used as crosslinker, and polyvinylpyrrolidone (PVP-K30) is used as stabilizer. The reaction kinetics of dispersed polymerization were investigated, and the conversion rate reached 98.9% after 4 hours of reaction. By means of infrared spectrum test, thermogravimetric analysis, high-performance liquid chromatography, gel permeation chromatography and other characterization methods, it is shown that all monomers are fully and completely polymerized, the temperature resistance of the fluid loss additive exceeds 300 ℃, and the molecular weight can reach 772,000. In the performance evaluation of cement slurry, fluid loss can be controlled within 40 mL at 150 ℃, and the engineering properties of cement slurry, such as rheological properties, thickening properties, and compressive strength, are excellent. The mechanism of the fluid loss additive is also discussed. The fluid loss additive C-FL72L has excellent application performance in functional cement slurry systems such as high-density, low-density, resin, latex, saline water, and has broad application prospects.
- Cementing /
- Oil well cement /
- Fluid loss additive /
- Dispersion polymerization /
- Control fluid loss /
- High temperature high pressure

HTML全文

图 1 样品反应状态随时间变化关系

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图 2 (a)单体转化率随时间变化曲线(b)ln([M]₀/[M])-时间曲线

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图 3 降失水剂C-FL72L的红外光谱

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图 4 降失水剂C-FL72L的热重曲线图

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图 5 水泥浆失水量与降失水剂加量的变化情况

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图 6 210 ℃高温水泥浆稠化曲线

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图 7 水泥浆滤饼扫描电镜图

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图 8 水泥浆API失水量和降失水剂C-FL72L吸附量与其加量的关系曲线

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表 1 降失水剂C-FL72L的分子量和分子量分布

样品名	数均分子量/kDa	重均分子量/kDa	分子量分布	t_出峰/min
C-FL72L	366.8	772	2.105	19.95～36.14

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表 2 C-FL72L加量2.5%下的水泥浆在不同温度下的流变性和失水性能

T/℃	C-FL72L/%	φ₃/φ₆/φ₁₀₀/φ₂₀₀/φ₃₀₀/φ₆₀₀	FL_API /mL
30	2.5	8/14/130/212/287	18
50	2.5	6/9/95/157/211	20
70	2.5	5/8/83/132/177	27
90	2.5	6/10/69/118/149	31
注：游离液均为0；不同温度下水泥浆均不沉降。

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表 3 高温下水泥浆失水量与降失水剂加量变化

C-FL72L/%	T/℃	FL_API/mL	Δρ_水泥石/（g·cm⁻³）
4.0	100	18	0.013
4.0	110	25	0.012
5.0	120	19	0.012
5.0	130	29	0.014
5.5	140	24	0.016
5.5	150	33	0.017
6.0	180	36	0.018
6.0	200	47	0.018
6.5	210	43	0.019

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表 4 水泥浆在不同温度下的稠化时间

T/℃	C-R21L/R42L/g	t_稠化/min	t_过渡/min
60	1	154	12
60	2	198	15
60	3	247	13
90	2	189	9
90	3	240	9
90	4	305	8
120	9	192	6
120	12	264	7
120	15	312	6
150	12	192	5
150	15	268	5
150	18	323	6
180	18	216	5
180	21	330	5
210	21	203	3
210	24	275	3
注：90 ℃及以下温度使用缓凝剂C-R21L，温度超过90 ℃使用缓凝剂C-R42L。

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表 5 不同温度下水泥石抗压强度

水泥浆	ρ/(g·cm⁻³)	T/℃	p/MPa
1^#	1.9	40	18.3
1^#	1.9	50	19.8
1^#	1.9	70	22.9
1^#	1.9	90	24.6
2^#	1.9	100	23.5
2^#	1.9	110	24.9
2^#	1.9	120	24.3
3^#	1.9	130	25.7
3^#	1.9	140	26.1
3^#	1.9	150	29.4
4^#	1.9	180	32.4
4^#	1.9	210	36.8

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表 6 不同水泥浆综合性能评价

水泥浆	T/ ℃	ρ/ g·cm⁻³	t_下灰/ s	FL_API/ mL	t_稠化/ min	p_{24 h}/ MPa	游离液/ %
5^#	210	2.2	33	45	347	24	0
6^#	140	1.68	23	40	349	21	0
7^#	140	1.9	20	25	262	26	0
8^#	200	1.9	43	32	341	35	0
9^#	150	2.2	31	45	306	24	0

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