文章摘要
疏水两性黄原胶的合成及流变性能评价
Synthesis and Property Evaluation of Hydrophobic Amphoteric Xanthan Gum
投稿时间:2017-08-02  修订日期:2017-08-07
DOI:
中文关键词: 黄原胶  疏水阳离子醚化试剂  疏水作用  静电作用  流变性  压裂液
英文关键词: xanthan gum  hydrophobic cationic etherifying agent  hydrophobic effect  electrostatic interaction  rheology  fracturing fluid
基金项目:国家科技重大专项
作者单位E-mail
刘双 华东理工大学化学工程研究所 245479247@qq.com 
张洪 华东理工大学化学工程研究所  
方波 华东理工大学化学工程研究所 fangbo@ecust.edu.cn 
卢拥军 中国石油勘探开发研究院廊坊分院  
邱晓惠 中国石油勘探开发研究院廊坊分院  
翟文 中国石油勘探开发研究院廊坊分院  
王丽伟 中国石油勘探开发研究院廊坊分院  
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中文摘要:
      为提高黄原胶的基本性能并拓宽其在石油开采领域的应用,采用环氧氯丙烷和十六叔胺合成了疏水阳离子醚化试剂(3-氯-2-羟丙基二甲基十六烷基醋酸铵);以此醚化试剂对黄原胶(XG)进行改性,首次制备出疏水两性黄原胶(HAXG),并对HAXG溶液的流变性能(表观黏度、触变性、流动曲线、粘弹性能)以及携砂性能、减阻性能、耐温耐剪切性能进行了深入研究。结果表明,HAXG溶液的表观黏度得到显著增强,0.4%HAXG溶液黏度(172.38 mPa?s)是0.4%XG溶液黏度(42.54 mPa?s)的4.05倍。XG和HAXG溶液表现出假塑性流体的剪切变稀特性,其流动曲线均可采用Cross模型进行描述。相较于XG,HAXG溶液具有更好的触变性能、黏弹性能和网络结构,从而表现出更加优良的携砂性能和耐温耐剪切性能。XG和HAXG溶液均表现出良好的减阻性能,对于0.12%的XG和HAXG溶液,其在光滑管中的最大减阻率分别为57.80%和65.01%,表明改性后的HAXG溶液的减阻效果得到了增强。改性后的HAXG通过分子间的静电作用和疏水作用,其基本性能得到了较大幅度的提高。
英文摘要:
      In order to improve the basic performance of xanthan gum and widen its application, hydrophobic cationic etherifying agent (3-chloro-2-hydroxypropylhexadecyldimethylammonium acetate) was prepared from epichlorohydrin and hexadecyldimethylamine, and then a novel hydrophobic amphoteric xanthan gum was synthesized from xanthan gum (XG) and the etherifying agent. Rheological properties, drag reduction and heat and shear stability of HAXG and XG solutions were studied in detail. The rheological results showed that the apparent viscosity of 0.4% HAXG solution was 4.05 times that of 0.4% XG solution. Both XG and HAXG solutions behave as pseudoplastic shear-thinning fluids, and the shear thinning behavior could be fitted quite well with Cross model. Compared with XG solution, HAXG solution exhibited more obvious thixotropy and much stronger viscoelasticity, thus better proppant-carrying capability and better heat and shear stability. Both the two solution exhibited good drag reduction performance, and for the concentration of 0.12%, the largest drag reduction rate of XG and HAXG solution are 57.80% and 65.01%, respectively, indicating HAXG solution exhibited better drag reduction than XG solution. Through intermolecular hydrophobic effects and electrostatic interactions, the basic performance of HAXG was improved dramatically.
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