Chemical Industry and Engineering Progree ›› 2016, Vol. 35 ›› Issue (09): 2926-2933.DOI: 10.16085/j.issn.1000-6613.2016.09.039

• Fine chemicals • Previous Articles     Next Articles

Synthesis of retarder SN-3 and effect on T2 distribution of cement paste research

ZHANG Rui1, HUO Jinhua1, DENG Yuan2, ZHANG Zhijian3, CHEN Dajun1, WANG Jixing1, YU Linjie1   

  1. 1 College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China;
    2 School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China;
    3 Antonoil Environmental Protection Technology Co., Ltd., Chengdu 610011, Sichuan, China
  • Received:2016-01-25 Revised:2015-03-09 Online:2016-09-05 Published:2016-09-05

缓凝剂SN-3的制备及其对水泥浆横向弛豫时间T2分布的影响

张瑞1, 霍锦华1, 邓媛2, 张直建3, 陈大钧1, 王吉星1, 喻麟杰1   

  1. 1 西南石油大学化学化工学院, 四川 成都 610500;
    2 西南石油大学石油与天然气工程学院, 四川 成都 610500;
    3 安东环保技术有限公司, 四川 成都 610011
  • 通讯作者: 张瑞(1979-),女,博士,副教授,长期从事油田应用化学方面的教学科研工作。E-mail:zhangrui@swpu.edu.cn。
  • 作者简介:张瑞(1979-),女,博士,副教授,长期从事油田应用化学方面的教学科研工作。E-mail:zhangrui@swpu.edu.cn。

Abstract: In this paper,a new type of amphoteric polymer retarder SN-3 is synthesized by solution polymerization,and infrared spectroscopy and elemental analysis is used to characterize the chemical structure of retarder SN-3. In addition,we further research the application performance of retarder SN-3,including the thickening time and the sensitivity to adding amounts and temperature. The results show that the cement paste with retarder SN-3 meets the requirements of the construction on site. Low-field nuclear magnetic resonance(NMR) test technology was used to study the influences of retarder SN-3 on the transverse relaxation time T2 distribution of cement paste in a hydration process, under the same water to cement ratio,temperature and hydration time to test the transverse relaxation time of the pure cement paste C and the cement paste CHN mixed with polymer SN-3. The migration rate and peak shape index are two parameters employed to characterize the change trend of the T2 distribution curve of cement paste. A further study about the retarding mechanism of the retarder SN-3 is obtained by low-field NMR analysis,XRD and SEM. The experimental results show that the retarder makes the bound level of water that fills in the flocculation structure decrease; the existence time of physically bound water increase,polymer SN-3 mainly by precipitation and complexation come to retarding effect.

Key words: retarder, the transverse relaxation time, retarding mechanism

摘要: 首先合成了一种新型两性聚合物缓凝剂SN-3,然后采用红外光谱和元素分析等测试手段对其进行结构表征。其次,对其应用性能作了进一步研究,主要包括稠化时间、加量和温度敏感性等,实验结果表明应用性能满足现场施工要求。利用低场核磁共振测试技术重点研究了缓凝剂SN-3对油井水泥浆水化过程中横向弛豫时间T2分布的影响,在相同的水灰比、温度和水化时间下,对纯水泥浆C和掺有缓凝剂SN-3的水泥浆CHN的横向弛豫时间进行测试和分析,借助迁移速率和峰形指数两个参数表征水泥浆T2分布曲线的变化过程。最后,结合X衍射和扫描电镜(SEM)进一步探讨缓凝剂SN-3的缓凝作用原理。实验结果表明,缓凝剂使水泥浆中填充于絮凝结构之间的水的受缚程度减小,存在时间变长,转化为化学结合水所经历时间变长;缓凝剂SN-3主要通过沉淀和络合作用达到缓凝效果的。

关键词: 缓凝剂, 横向弛豫时间, 缓凝机理

CLC Number: 

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