第34卷第3期 2017年5月
钻井液与完井液
DRILLING FLUID & COMPLETION FLUID
doi: 10.3969/j.issn.1001-5620.2017.03.014
梳型聚羧酸减阻剂的室内研究辛海鹏，曾建国，邹建龙，赵宝辉，孙富全
（中国石油集团海洋工程有限公司渤星公司，天津300451）
Vol. 34 No.3 May2017
辛海鹏，曾建国，邹建龙，等，梳型聚羧酸减阻剂的室内研究[]钻井液与完井液，2017，34（3）：72-76.
XIN Haipeng, ZENG Jianguo, ZOU Jianlong, et al.Laboratory study on comb-like polycarboxylic acid friction reducer[J] Drilling Fluid & Completion Fluid, 2017,34（3):72-76.
摘要针对高压盐水层、大役盐膏层及海上作业直接采用海水配蒙围并时，现有减阻剂分散能力差、分傲保持性差、缓凝性强的缺点，采用自由基聚合方式开发了具有梳型结构的聚羧酸减阻剂。通过红外光谱、电镜分析和热重分析测定了减阻剂的结构和耐热性，根据行业标准测定了减阻剂加入对水泥蒙流变性、稠化性能和强度的影响，并进行了对高密度水
该减阻剂耐混可达233℃。扫插电镜与原子力显微镜测试表明该减阻剂呈梳型。
泥浆的适应性研究。热重分析结果表明，
该减阻剂对水泥案分散能力强，对饱和盐水和海水配浆体系具有良好的分散作用，缓凝性弱，且不破坏强度，可用海水直接配浆。加入该减阻剂后密度为2.72g/cm的水泥浆体系失水量为24mL，24h强度为22MPa，90稳定性及流变性好。其对饱和盐水体系良好的分散效果及对高密度水泥浆体累良好的适应性表明，梳型聚羧酸减阻剂是一种高效减阻剂。
关键词固井；水泥蒙；减阻剂；聚羧酸；梳型
中图分类号：TE256.6
文献标识码：A
文章编号：1001-5620（2017）03-0072-05
Laboratory Study on Comb-like Polycarboxylic Acid Friction Reducer
XIN Haipeng,ZENG Jianguo,ZOU Jianlong,ZHAO Baohui,SUN Fuquan(Boxing Division of CNPC Ofshore Engineering Company Limited, Tianjin 300451)
Abstract Cementing slurries formulated with seawater are generally used in cementing the wells penetrating high pressure saltwater zones, long sal/gypsum formations, or wells drilled offshore, Friction reducers commonly used are difficult to disperse in the seawater cementing slurries, and have short dispersion duration and strong retarding performance. A polycarboxylic acid friction reducer with comb-like molecular structure has recently been developed to overcome these problems. The friction reducer was synthesized through free-radical polymerization, and was studied for its molecular structure and thermal stability using IR, SEM and thermogravimetric analysis. The effects of the friction reducer on the rheology, thickening performance and strength of cement slurries were measured in accordancewithrelevantindustrialstandards.Theadaptabilityoftherictionreducertocementslurrywasalsostudied.Thermogravimetri analysis showed that the friction reducer was stable at temperatures as high as 233 C. SEM and atomic force microscope measurement demonstrated that the friction reducer had comb-like molecular structure, This friction reducer was highly dispersible in cement slurries formulated with saturated saltwater or seawater, and had weak retarding power. It didn't deteriorate the strength of the cement slurries which were formulated directly from seawater.A cement slurry treated with the friction reducer had density of 2.72 g/cm', filter loss of 24 mL, 24 h strength of 22 MPa, and good stability and rheology at 90 °C. Good dispersity in saturated saltwater and good adaptability
to high density cement slurry indicated that the comb-like polycarboxylic acid friction reducer was of high efficiency Key werds Well cementing; Cementing slurry; Friction reducer; Polycarboxylic acid; Comb-like
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引言
油气资源开发正向高温深井、高酸性气藏、稠
油、页岩气、高压盐水层等复杂地质油气藏推进。在中国的西部油田、中原油田、南海油田的钻探过
（
第一作者简介：辛海鹏，工程师，博士，1986年生，毕业于山东大学高分子化学与物理专业，现从事油井水泥外加
剂的研发及技术服务工作。电话（022）66310216；E-mail：xinhpcnpc.com.cn。万方数据