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用于固井水泥浆的非发泡苯乙烯 - 丙烯酸胶乳的制备及性能评价

Preparation and performance evaluation of non-foaming styrene-acrylic latex for cementing slurry.

作者信息

Guo Shenglai, Li Ming, Li Sihe, Zhao Jiaxin, Bu Yuhuan, Liu Huajie, Wang Yindong

机构信息

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

Dagang Oilfield Downhole Operation Company, Tianjin 300270, People's Republic of China.

出版信息

R Soc Open Sci. 2023 Feb 22;10(2):221319. doi: 10.1098/rsos.221319. eCollection 2023 Feb.

DOI:10.1098/rsos.221319
PMID:36844803
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9943870/
Abstract

The latex used conventionally for oil-well cementing can lead to serious foaming issues in the cement slurry, which not only affects the accurate measurement of the density of the latex-containing cement slurry, but also is detrimental to cementing construction. A large amount of a foam stabilizer used for latex preparation is mainly responsible for foaming of the latex-containing cement slurry. In this study, soap-free emulsion polymerization was conducted using 2-acrylamido-2-methylpropanesulfonic acid (AMPS), styrene (St), and butyl acrylate (BA) as the reaction monomers and the effects of the AMPS dosage, monomer ratio, reaction temperature and stirring speed on the performance of the latex were investigated. The optimum synthesis conditions included a 30% monomer concentration, an St : BA : AMPS monomer ratio of 5 : 4 : 6, a synthesis temperature of 85°C, a stirring speed of 400 r.p.m. and 1.5% of the initiator. As-prepared latex exhibited good filtration loss control, excellent freeze-thaw stability, and extremely low foaming of the cement slurry with the added latex, which was extremely beneficial for on-site cementing construction.

摘要

常规用于油井固井的胶乳会导致水泥浆出现严重的起泡问题，这不仅会影响含胶乳水泥浆密度的准确测量，还对固井施工不利。用于制备胶乳的大量泡沫稳定剂是含胶乳水泥浆起泡的主要原因。在本研究中，以2-丙烯酰胺基-2-甲基丙磺酸（AMPS）、苯乙烯（St）和丙烯酸丁酯（BA）作为反应单体进行了无皂乳液聚合，并研究了AMPS用量、单体比例、反应温度和搅拌速度对胶乳性能的影响。最佳合成条件包括单体浓度为30%、St:BA:AMPS单体比例为5:4:6、合成温度为85°C、搅拌速度为400转/分钟以及引发剂用量为1.5%。所制备的胶乳表现出良好的滤失控制、优异的冻融稳定性，并且添加该胶乳的水泥浆起泡极低，这对现场固井施工极为有利。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32d8/9943870/c07a92e4d708/rsos221319f12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32d8/9943870/b9ea9d61f5ba/rsos221319f07.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32d8/9943870/1e302fef090e/rsos221319f08.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32d8/9943870/42b561aea59d/rsos221319f09.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/32d8/9943870/4750cfe5517f/rsos221319f10.jpg
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本文引用的文献

1
A novel hydrophobically associating water-soluble polymer used as constant rheology agent for cement slurry.一种用作水泥浆恒流变剂的新型疏水缔合水溶性聚合物。
R Soc Open Sci. 2022 Feb 23;9(2):211170. doi: 10.1098/rsos.211170. eCollection 2022 Feb.
2
Utilization of metakaolin-based geopolymer as a mud-cake solidification agent to enhance the bonding strength of oil well cement-formation interface.利用偏高岭土基地质聚合物作为泥饼固化剂来提高油井水泥与地层界面的粘结强度。
R Soc Open Sci. 2020 Feb 26;7(2):191230. doi: 10.1098/rsos.191230. eCollection 2020 Feb.
3
Effects of freezing and thawing on the microstructure of latex paints.
冷冻和解冻对乳胶漆微观结构的影响。
J Colloid Interface Sci. 2013 Feb 15;392:183-193. doi: 10.1016/j.jcis.2012.10.008. Epub 2012 Oct 16.