| 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 |
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| 引用本文： | 张瑞,霍锦华,邓媛,张直建,陈大钧,王吉星,喻麟杰.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[J].化工进展,2016,35(9):2926-2933. |
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| 作者姓名： | 张瑞 霍锦华 邓媛 张直建 陈大钧 王吉星 喻麟杰 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 缓凝剂 横向弛豫时间 缓凝机理 |
| 收稿时间： | 2016-01-25 |
Synthesis of retarder SN-3 and effect on T2 distribution of cement paste research |
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| ZHANG Rui,HUO Jinhua,DENG Yuan,ZHANG Zhijian,CHEN Dajun,WANG Jixing,YU Linjie.Synthesis of retarder SN-3 and effect on T2 distribution of cement paste research[J].Chemical Industry and Engineering Progress,2016,35(9):2926-2933. |
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| Authors: | ZHANG Rui HUO Jinhua DENG Yuan ZHANG Zhijian CHEN Dajun WANG Jixing YU Linjie |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | retarder the transverse relaxation time retarding mechanism |
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