Synthesis and evaluation of a temperature-sensitive copolymer P(NVCL-co-DMAM) for its application in controlling low-temperature rheology of water-based drilling fluid

被引：0
|
作者：
Ding T. [1 ,2 ]
Wang R. [1 ,3 ]
Xu J. [1 ,2 ,3 ]
Li J. [4 ]
Wang J. [1 ]
Wang X. [1 ]
Xue J. [1 ]
Yuan S. [1 ]
Yang X. [1 ]
机构：
[1] School of Petroleum Engineering in China University of Petroleum(East China), Qingdao
[2] Shandong Key Laboratory of Oilfield Chemistry(China University of Petroleum (East China)), Qingdao
[3] Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao
[4] China Petroleum Technology & Development Corporation (CPTDC), Beijing
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2021年 / 45卷 / 06期
关键词：
Deep-water drilling fluid; Low-temperature rheology; Lower critical solution temperature; Temperature-sensitive copolymer;
D O I：
10.3969/j.issn.1673-5005.2021.06.010
中图分类号：
学科分类号：
摘要：
The molecular conformation and hydrophilicity/ hydrophobicity of temperature-sensitive polymers can be changed at different temperatures, which can be used as additive in drilling fluid to adjust the network structure between clay particles and polymers and improve its rheological property. In this study, a novel temperature-sensitive copolymer P(NVCL-co-DMAM) was synthesized by using temperature-sensitive unit N-vinylcaprolactam (NVCL) and N, N-dimethylacrylamide (DMAM), initiated by azobisisobutyronitrile (AIBN). Its molecular structure, molecular weight and distribution were characterized. The effects of salinity, pH value and copolymer concentrations on lower critical solution temperature(LCST)were studied. Based on the temperature-sensitive property of the copolymer, its capability to control the low-temperature rheology of water-based drilling fluid was evaluated. The results show that P(NVCL-co-DMAM) can effectively control the rheology of deep-water water-based drilling fluid in the range of 4-60 ℃. The copolymer has high temperature and salt tolerance, which can withstand the large temperature alternation during deep-water drilling process. © 2021, Editorial Office of Journal of China University of Petroleum(Edition of Natural Science). All right reserved.
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页码：87 / 94
页数：7
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