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

作　　者：谢彬强[1,2] 陶怀志 张俊 陈晋东 吕军贤 赵林[1,2] Xie Binqiang;Tao Huaizhi;Zhang Jun;Chen Jindong;LüJunxian;Zhao Lin(Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas,Yangtze University,Hubei Wuhan 430100,China;School of Petroleum Engineering,Yangtze University,Hubei Wuhan 430100,China;Drilling and Production Technology Research Institute,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Sichuan Guanghan 618300,China;Research Institute of Petroleum Engineering,Sinopec Northwest Oilfield Company,Xinjiang Urumqi 830011,China)

机构地区：[1]长江大学油气钻采工程湖北省重点实验室,湖北武汉430100 [2]长江大学石油工程学院,湖北武汉430100 [3]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 [4]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

出　　处：《石油学报》2024年第2期427-436,共10页Acta Petrolei Sinica

基　　金：国家自然科学基金项目(No.51974034,No.51404040);高分子材料工程国家重点实验室基金项目(SKLPME 2017-04-07)资助。

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。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 thermo-sensitive monomer(MVC)/sodium 2-acrylamido-2-methylpropane sulfonate(NaAMPS)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 analysis(TGA)and environmental SEM,respectively.The temperature response characteristics of TSP-Comb was studied using rheometer 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 rheological 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 

分 类 号：TE254[石油与天然气工程—油气井工程]