一种抗高温梳型两性离子聚合物降黏剂

邓正强; 张涛; 黄平; 罗宇峰; 王国帅; 贺垠博; 蒋官澄

doi:10.12358/j.issn.1001-5620.2024.02.006

一种抗高温梳型两性离子聚合物降黏剂

doi: 10.12358/j.issn.1001-5620.2024.02.006

1.
中石油川庆钻探工程有限公司钻井液技术服务公司，成都 610051
2.
中国石油大学(北京)石油工程学院, 北京102200

基金项目: 中石油川庆钻探工程有限公司钻井液技术服务公司“抗温 200 ℃高密度水基钻井液体系” （CQ2022B-18-1-3）。

详细信息

作者简介:
邓正强，工程师，1989年生，毕业于中国石油大学（北京），现在从事钻井液与完井液工作。E-mail：dengzhengq_sc@cnpc.com.cn

通讯作者:
蒋官澄，教授，博士研究生导师。E-mail：m15600263100_1@163.com。

中图分类号: TE254.4
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- 被引次数: 0
出版历程
- 收稿日期: 2023-10-23
- 修回日期: 2023-12-03
- 刊出日期: 2024-04-02

A High Temperature Comb and Zwitterionic Polymer Thinner

1.
CCDC Drilling Fluid Technology Service Co., LTD, Chengdu, Sichuan 610051
2.
College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102200

摘要

摘要: 针对深井超深井钻井中高密度水基钻井液黏度高、易高温增稠等流变性调控难题，以对苯乙烯磺酸钠盐、2-丙烯酰胺基-2-甲基丙磺酸、2-烯丙基-2-甲基氯化铵、烯丙基聚氧乙烯醚为单体，合成了一种抗高温梳型两性离子聚合物降黏剂ZT-1。采用红外光谱表征了降黏剂的分子结构，验证梳型两性离子聚合物合成的成功，采用热重分析表征了降黏剂的热稳定性，其分解温度达250 ℃。ZT-1具有良好的抗高温耐盐钙降黏分散性能，抗温240 ℃，可抗饱和盐，抗2%氯化钙；ZT-1加量为0.3%时，老化温度为200 ℃，在评价浆中的降黏率可达77.7%，在高密度（2.4 g/cm³）水基钻井液体系中表观黏度的降低率达33%，塑性黏度的降低率达14%，动切力降低率达67%。ZT-1性能优于阴离子降黏剂磺化丹宁以及常规线性两性离子聚合物降黏剂XY-27和ADS共聚物，这种梳型两性离子聚合物降黏剂在超高温超高密度钻井液中具有良好的应用前景。
- 降黏剂 /
- 抗高温 /
- 水基钻井液 /
- 梳型聚合物
Abstract: In deep and ultra-deep well drilling, high density water based drilling fluids are often faced with rheological problems of high viscosity and thickening at elevated temperatures. To solve these problems, a high temperature comb zwitterionic polymer thinner ZT-1 was developed with monomers including sodium p-styrene sulfonate, 2-acrylamido-2-methylpropane sulfonic acid, 2-allyl-2-methylammonium chloride and allyl polyoxyethylene ether. Characterization of the molecular structure of the thinner by IR spectrum shows that the synthesis of the comb zwitterionic polymer is successful. GTA characterization of the thinner demonstrates that ZT-1 has decomposition temperature of 250 ℃. Excellent properties of ZT-1 include high temperature stability and resistance to salt and calcium contamination; ZT-1 functions normally at temperatures up to 240 ℃, and it is resistant to salt contamination to saturation and to calcium contamination to 2% CaCl₂, respectively. A base mud treated with 0.3% ZT-1, after aging at 200 ℃, has its viscosity reduced by 77.7%. High density (2.4 g/cm³) drilling fluids can have their viscosity reduced by 33%, plastic viscosity reduced by 14% and yield point reduced by 67% with ZT-1. The performance of ZT-1 is better than that of the sulfonated tannin, XY-27 and ADS, the latter two being regular linear ionic zwitterionic polymers. This comb zwitterionic polymer thinner has good application in ultra-high density drilling fluids for ultra-high temperature drilling.
- Thinner /
- High temperature resistance /
- Water based drilling fluid /
- Comb polymer

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图 1 降黏剂ZT-1的红外光谱图

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图 2 降黏剂ZT-1的热重图

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图 3 0.3%不同降黏剂老化前后降黏效果（200 ℃、16 h）

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图 4 0.3%不同降黏剂老化后抗盐钙性能（200 ℃、16 h）

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图 5 ZT-1在基浆中的粒径分布图对比

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图 6 ZT-1在重晶石分散液的粒径分布图对比

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表 1 ZT-1加量对评价浆流变参数的影响

ZT-1/%	AV/mPa·s	PV/mPa·s	YP/Pa	φ₁₀₀	DI/%
0	12.0	6	6.0	15.0
0.1	7.0	4	3.0	8.0	46.7
0.2	6.0	4	2.0	6.0	60.0
0.3	4.5	3	1.5	4.5	70.0
0.4	7.0	4	3.0	7.0	53.3
0.5	8.0	5	3.0	8.0	46.7

下载: 导出CSV

表 2 在评价浆中加入0.3%ZT-1前后的性能

ZT-1/ %	T_老化/ ℃	AV/ mPa·s	PV/ mPa·s	YP/ Pa	φ₁₀₀	DI/ %
0	室温	12.0	6	6.0	15.0	70.0
0.3	室温	7.0	4	3.0	4.5	70.0
0	180	13.0	6	7.0	16.0	73.3
0.3	180	7.0	4	3.0	5.0	73.3
0	200	14.0	7	7.0	18.0	77.7
0.3	200	4.5	3	1.5	4.0	77.7
0	220	16.0	8	8.0	19.0	78.9
0.3	220	5.0	4	1.0	4.0	78.9
0	240	17.0	8	9.0	19.0	68.4
0.3	240	9.0	6	3.0	6.0	68.4

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表 3 ZT-1在不同盐水中的降黏率（200 ℃、16 h）

污染物	AV/mPa·s	PV/mPa·s	YP/Pa	φ₁₀₀	DI/%
空白	4.5	3	1.5	4.0	70.0
10%NaCl	4.0	3	1.0	4.0	73.3
15%NaCl	4.5	3	1.5	4.5	70.0
20%NaCl	6.0	4	2.0	5.0	66.6
30%NaCl	7.0	5	2.0	5.5	63.3
36%NaCl	7.0	5	2.0	5.5	63.3
0.5%CaCl₂	6.0	5	1.0	5.0	76.2
1.0%CaCl₂	6.0	3	3.0	4.0	78.6
2.0%CaCl₂	7.0	4	3.0	6.0	70.2

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表 4 ZT-1在现场2.4 g/cm³高密度钻井液中的降黏效果

ZT-1/ %	T_老化/ ℃	φ₁₀₀	φ₆	φ₃	AV/ mPa·s	PV/ mPa·s	YP/ Pa	FL_HTHP/ mL
0	室温	50	10	9	107.0	92	15.0
0	200	83	21	18	122.5	71	51.5	12.2
0.3	室温	42	5	4	92.0	75	17.0
0.3	200	49	10	7	78.0	61	17.0	10.0

下载: 导出CSV

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