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一种用作水泥浆恒流变剂的新型疏水缔合水溶性聚合物。

A novel hydrophobically associating water-soluble polymer used as constant rheology agent for cement slurry.

作者信息

Bu Yuhuan, Xu Mengran, Liu Huajie, Zhou Annan, Du Jiapei, Yang Xin, Guo Shenglai

机构信息

Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, People's Republic of China.

School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, People's Republic of China.

出版信息

R Soc Open Sci. 2022 Feb 23;9(2):211170. doi: 10.1098/rsos.211170. eCollection 2022 Feb.

DOI:10.1098/rsos.211170
PMID:35223053
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8864343/
Abstract

During the process of well cementing in deep water, the cement slurry experiences a wide range of temperature variation from low temperature at seabed to high temperature in downhole. The elevated temperature affects the rheology of cement slurry. The change of rheology of cement slurry could influence the safety of cementing operation. The aim of this paper is to develop a new kind of hydrophobically associating water-soluble polymer (NHAWP) as an additive to prepare a constant rheology oil well cement slurry, which can be used at temperature range from 4°C to 90°C. The acrylamide, 2-acrylamide-2-methylpropionic acid and stearyl methylacrylate were applied to synthesize the NHAWP by the inverse microemulsion polymerization. Test results indicate that the critical association temperature of NHAWP is 45°C. The critical association temperature is independent of NHAWP concentration, salt concentration and alkalinity of solution. When the temperature is below 45°C, NHAWP shows little influence on the viscosity of solution. When the temperature is above 45°C, the NHAWP forms spatial network structure by intermolecular hydrophobic association and thus increases the viscosity of solution significantly. The NHAWP also displays good thermal stability and excellent salt and alkali resistance properties. In addition, the NHAWP shows nearly no negative influence on the basic properties of cement slurry, which indicates that the NHAWP can be used as a constant rheology agent to prepare a cement slurry with constant rheology in the temperature range of 4°C to 90°C.

摘要

在深水固井过程中，水泥浆经历了从海底低温到井下高温的大范围温度变化。温度升高会影响水泥浆的流变性能。水泥浆流变性能的变化可能会影响固井作业的安全性。本文的目的是开发一种新型疏水缔合水溶性聚合物（NHAWP）作为添加剂，以制备一种在4℃至90℃温度范围内具有恒定流变性能的油井水泥浆。通过反相微乳液聚合，使用丙烯酰胺、2-丙烯酰胺-2-甲基丙酸和硬脂基甲基丙烯酸酯合成了NHAWP。测试结果表明，NHAWP的临界缔合温度为45℃。临界缔合温度与NHAWP浓度、盐浓度和溶液碱度无关。当温度低于45℃时，NHAWP对溶液粘度影响很小。当温度高于45℃时，NHAWP通过分子间疏水缔合形成空间网络结构，从而显著提高溶液粘度。NHAWP还具有良好的热稳定性和优异的耐盐碱性。此外，NHAWP对水泥浆的基本性能几乎没有负面影响，这表明NHAWP可以用作恒定流变剂，在4℃至90℃温度范围内制备具有恒定流变性能的水泥浆。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c07f/8864343/202fcb9534b0/rsos211170f16.jpg

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本文引用的文献

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The synthesis of translucent polymer nanolatexes via microemulsion polymerization.通过微乳液聚合合成半透明聚合物纳米胶乳。
J Colloid Interface Sci. 2012 Oct 1;383(1):28-35. doi: 10.1016/j.jcis.2012.06.012. Epub 2012 Jun 15.
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Controlling the cohesion of cement paste.控制水泥浆体的粘结性。
Langmuir. 2005 Sep 27;21(20):9211-21. doi: 10.1021/la051048z.