石油学报2024，Vol.45Issue(2) ：427-436.DOI:10.7623/syxb202402008

梳型温敏聚合物对无固相水基钻井液高温流变性的调控

Regulation of comb-type thermo-sensitive polymer on high-temperature rheological properties of solid-free water-based drilling fluid

谢彬强 陶怀志 张俊 陈晋东 吕军贤 赵林
石油学报2024，Vol.45Issue(2) ：427-436.DOI:10.7623/syxb202402008
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梳型温敏聚合物对无固相水基钻井液高温流变性的调控

Regulation of comb-type thermo-sensitive polymer on high-temperature rheological properties of solid-free water-based drilling fluid

谢彬强 1陶怀志 2张俊 3陈晋东 4吕军贤 4赵林1
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作者信息

  • 1. 长江大学油气钻采工程湖北省重点实验室 湖北武汉 430100;长江大学石油工程学院 湖北武汉 430100
  • 2. 中国石油川庆钻探工程有限公司钻采工程技术研究院 四川广汉 618300
  • 3. 中国石油化工股份有限公司西北油田分公司石油工程技术研究院 新疆乌鲁木齐 830011
  • 4. 长江大学石油工程学院 湖北武汉 430100
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摘要

针对现有聚合物增黏剂存在高温降黏缺陷,不能有效调控无固相水基钻井液高温流变性能的难题,采用自由基胶束聚合法制备了丙烯酰胺(AM)/新型温敏单体(MVC)/2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)梳型温敏聚合物(TSP-Comb).采用红外光谱、核磁氢谱和凝胶渗透色谱等表征和测定了 TSP-Comb的分子结构和重均分子量,采用热重分析和环境扫描电镜分别测定了TSP-Comb分子链的热稳定性和微观结构,采用流变仪和可见分光光度计研究了 TSP-Comb的温度响应特性,并研究了 TSP-Comb对无固相水基钻井液高温流变性能的调控效果.研究结果表明,TSP-Comb溶液在90～180 ℃范围内具有优良的高温增稠特性和较高的相变温度(高于60℃),相比较于线性温敏聚合物,TSP-Comb在高温流变稳定性和相变温度提升方面均有明显改善;TSP-Comb的高温增稠特性有助于改善无固相钻井液的高温流变性能,基于TSP-Comb构建的无固相钻井液的表观黏度、塑性黏度、动切力等流变参数在90～180 ℃较宽温度范围内的变化率小于25％,TSP-Comb显著提高了无固相钻井液的高温流变稳定性,为无固相水基钻井液高温流变性能调控提供了一种新方法.

Abstract

In view of the problem that existing polymer tackifiers have the defect of viscosity reduction at high temperature and cannot effectively regulate the high-temperature rheological properties of solid-free water-based drilling fluid,acrylamide(AM)/new ther-mo-sensitive monomer(MVC)/sodium 2-acrylamido-2-methylpropane sulfonate(Na AMPS)comb-type thermo-sensitive polymer(TSP-Comb)was prepared by free radical micellar polymerization.The molecular structure and weight-average molecular weight of TSP-Comb were characterized and measured by infrared spectroscopy,nuclear magnetic hydrogen spectroscopy and gel permeation chromatography.The thermal stability and microstructure of TSP-Comb molecular chain were measured by thermo gravimetric anal-ysis(TGA)and environmental SEM,respectively.The temperature response characteristics of TSP-Comb was studied using rheome-ter and visible spectrophotometer,and the regulation effect of TSP-Comb on the high-temperature rheological properties of solid-free water-based drilling fluid was also studied.The results show that TSP-Comb solution has excellent high-temperature thickening property within the temperature range of 90 ℃ to 180 ℃ and higher phase transition temperature(higher than 60 ℃).Compared with linear thermo-sensitive polymers,TSP-Comb has been significantly improved in terms of high-temperature rheological stability and phase transition temperature.The high-temperature thickening property of TSP-Comb helps improve the high-temperature rheo-logical properties of solid-free drilling fluid.The change rate of rheological parameters such as apparent viscosity,plastic viscosity and dynamic shear force of solid-free drilling fluid based on TSP-Comb was lower than 25％within a wide temperature range of 90 ℃ to 180 ℃,and TSP-Comb has significantly improved the high-temperature rheological stability of solid-free drilling fluid,providing a new method for regulating the high-temperature rheological properties of solid-free water-based drilling fluid.

关键词

梳型聚合物/温敏聚合物/高温增稠/高温流变性/无固相钻井液

Key words

comb-type polymer/thermo-sensitive polymer/high temperature thickening/high temperature rheology/solid-free drilling fluid

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基金项目

国家自然科学基金项目(51974034)

国家自然科学基金项目(51404040)

高分子材料工程国家重点实验室基金项目(SKLPME 2017-04-07)

出版年

2024
石油学报
中国石油学会

石油学报

CSTPCDCSCD北大核心
影响因子：3.438
ISSN：0253-2697
被引量1
参考文献量38
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