一种全温域聚合物缓凝剂

田野; 王义昕; 赵军; 宋维凯; 于天帅; 王贺宁

doi:10.12358/j.issn.1001-5620.2024.06.011

一种全温域聚合物缓凝剂

doi: 10.12358/j.issn.1001-5620.2024.06.011

1.
中海油田服务股份有限公司油田化学研究院, 河北廊坊 065201
2.
中海油田服务股份有限公司新疆油化项目部, 新疆轮台 841600

基金项目: 中海油服公司级科研项目“海水基固井关键外加剂的开发与机理研究”（E-23236004）。

详细信息

作者简介:
田野，高级工程师，毕业于西南石油大学化学工程专业，现在主要从事固井技术研究工作。电话18033662931；E-mail：tianye2@cosl.com.cn。

中图分类号: TE256.6
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出版历程
- 收稿日期: 2024-07-07
- 修回日期: 2024-08-13
- 刊出日期: 2024-11-30

A Full Temperature Range Polymer Retarder

1.
Oilfield chemicals Division, COSL, Langfang, Hebei 065201
2.
XinJiang Oilfield chemicals Department, COSL, Luntai, Xinjiang 841600

摘要

摘要: 针对传统链状聚合物缓凝剂规律性差、中低温易超缓凝、强度发展缓慢的技术难题，根据缓凝剂作用机理、通过优化分子结构设计，在2-丙烯酰胺-2-甲基丙磺酸（AMPS）和衣康酸（IA）基础上引入苯乙烯磺酸钠（SSS）单体和长链疏水缔合单体TAS-24，制备出一种新型四元聚合物缓凝剂C-R45L，并通过红外光谱和水泥浆性能评价对其进行了研究。研究结果表明：缓凝剂C-R45L具有良好的缓凝效果，在加量为4%、温度为210 ℃的下稠化时间可达到347 min；在高温及中低温下都具有良好的规律性，不仅适用于高温条件，也可应用于中低温固井；对水泥石抗压强度无不利影响，中低温及顶部强度发展快，具有良好的大温差性能，适用于长封固段固井。缓凝剂C-R45L在古探1井成功应用，固井质量优良。
- 聚合物缓凝剂 /
- 全温域 /
- 疏水缔合 /
- 规律性 /
- 大温差
Abstract: A new quaternary polymer retarder C-R45L has been developed through molecular design to overcome the shortcomings of the conventional chain polymer retarders such as poor regularity, easy to cause overtime retardation at medium-low temperatures and slow development of strength etc. The raw materials for the synthesis of C-R45L include 2-acrylamido-2-methylpropanesulfonic acid (AMPS), itaconic acid (IA), sodium styrene sulfonate (SSS) and a long-chain hydrophobic associative monomer TAS-24. Study on C-R45L with IR spectroscopy and laboratory evaluation of C-R45L’s effects on the performance of cement slurries show that C-R45L has good retarding effect; a cement slurry treated with 4% C-R45L has thickening time of 347 min at 210 ℃. At high and medium-low temperatures, C-R45L has good retarding regularity. C-R45L can be used at high-temperature, medium-temperature and low-temperature operations. It has no adverse effect on the compressive strength of set cement, the medium/low temperature strengths and the top strength of set cement develop very fast. Good wide-temperature-range performance makes C-R45L suitable for use in cementing long open holes. C-R45L has been successfully used in cementing the exploration well Gutan-1, and excellent cementing job quality was obtained.
- Polymer retarder /
- Full temperature range /
- Hydrophobic association /
- Regularity /
- Wide temperature range

HTML全文

图 1 C-R45L的红外光谱图

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图 2 缓凝剂C-R45L的凝胶色谱图

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图 3 缓凝剂C-R45L在60、160 ℃下的稠化曲线

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图 4 高温及中低温段缓凝剂温度敏感性

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图 5 缓凝剂C-R45L加量敏感性

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图 6 不同C-R45L加量下水化放热速率和累计放热量

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表 1 缓凝剂C-R45L稠化性能评价

C-R45L/%	T/℃	t_稠化/min	C-R45L/%	T/℃	t_稠化/min
0.8	30	373	2.8	160	371
1.5	60	380	4.0	210	347
1.5	100	327

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表 2 不同缓凝剂对水泥浆抗压强度的影响

缓凝剂	加量/ %	T/ ℃	t_稠化/ min	p/MPa
缓凝剂	加量/ %	T/ ℃	t_稠化/ min	24 h	48 h	72 h
C-R45L	0.80	30	373	5.8	18.3
	1.50	30	596	2.6	16.8
	1.50	60	380	15.8	22.4
	1.50	90	352	18.3	25.9
	1.50	120	314	25.2	28.5
	2.75	90		0	8.6	18.2
	2.75	150	320	28.3	31.2
C-R40L	3.00	90		0	0.4	14.2
C-R40L	3.00	150	325	27.8	32.0

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表 3 水化产物分析

物相	不同C-R45L加量（%）水泥的水化产物/%
物相	0	2	4
C₃S	6.32	10.92	14.04
C₂S	2.68	4.27	8.06
MgO	0	0.13	0.02
C₃A	0	0.44	0.92
C₄AF	3.36	7.27	7.69
CaSO₄	0.32	0.42	0.77
Ca(OH)₂	0.06	0	0.90
α-SiO₂	11.58	14.87	17.68
CaCO₃	1.70	0.70	0.63
α-C₂SH	4.58	8.19	11.03
CSH	69.40	52.79	38.26

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表 4 塔东古探1井Φ200 mm套管固井水泥浆性能

水泥浆	ρ/ g·cm⁻³	流动度/ cm	FL_API / mL	t_稠化/ min	p_顶部/MPa 72 h（36 ℃）	p_底部/MPa 24 h（145 ℃）
领浆	1.40	20	36	420	3.8
尾浆	1.88	22	28	238		30.5

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