阳离子黄原胶的合成及性能评价
发布时间：2018-11-28 18:24
【摘要】：为提高黄原胶的基本性能并拓宽其应用范围,将阳离子醚化剂(3-氯-2-羟丙基三甲基氯化铵)和黄原胶(XG)在碱性条件下反应制得淡黄色的阳离子黄原胶(CXG),对CXG的流变特性(剪切变稀性、黏弹性、触变性)以及其作为压裂液的基本性能(携砂性、耐温耐剪切性)进行了研究。结果表明,6 g/L CXG溶液的表观黏度比XG溶液增大了1.34倍,且CXG溶液的弹性模量G'、黏性模量G''和触变环面积均比XG溶液有显著的提高;陶粒在CXG溶液的沉降速度远小于在XG溶液的沉降速度,携砂性能得到提高;XG改性后的耐温耐剪切性提高,4 g/L CXG溶液在80℃、170 s~(-1)下剪切90 min后的保留黏度为58.05 mPa·s,与同浓度的XG溶液在30℃的表观黏度(47.53 mPa·s)相当;XG和CXG溶液的流动曲线可用非线性共转Jeffreys本构方程进行表征,且模拟值与实验值吻合良好。XG通过阳离子改性后,基本性能得到了较大幅度的提高。
[Abstract]:In order to improve the basic properties of xanthan gum and broaden its application scope, cationic etherifying agent (3-chloro-2-hydroxypropyl trimethyl ammonium chloride) and xanthan gum (XG) were reacted to prepare a yellowish cationic xanthan gum (CXG), under alkaline conditions. The rheological properties (shear thinning, viscoelasticity, thixotropy) of CXG and its basic properties as fracturing fluid (sand carrying property, high temperature shear resistance) were studied. The results showed that the apparent viscosity of 6 g / L CXG solution was 1.34 times higher than that of XG solution, and the elastic modulus, viscosity modulus and thixotropic ring area of CXG solution were significantly higher than that of XG solution. The settling velocity of ceramsite in CXG solution is much lower than that in XG solution, and the sand carrying property is improved. The temperature and shear resistance of XG modified solution was improved. The retention viscosity of 4g / L CXG solution was 58.05 mPa / s after being shearing for 90 min at 80 鈩，
本文编号：2363859
[Abstract]:In order to improve the basic properties of xanthan gum and broaden its application scope, cationic etherifying agent (3-chloro-2-hydroxypropyl trimethyl ammonium chloride) and xanthan gum (XG) were reacted to prepare a yellowish cationic xanthan gum (CXG), under alkaline conditions. The rheological properties (shear thinning, viscoelasticity, thixotropy) of CXG and its basic properties as fracturing fluid (sand carrying property, high temperature shear resistance) were studied. The results showed that the apparent viscosity of 6 g / L CXG solution was 1.34 times higher than that of XG solution, and the elastic modulus, viscosity modulus and thixotropic ring area of CXG solution were significantly higher than that of XG solution. The settling velocity of ceramsite in CXG solution is much lower than that in XG solution, and the sand carrying property is improved. The temperature and shear resistance of XG modified solution was improved. The retention viscosity of 4g / L CXG solution was 58.05 mPa / s after being shearing for 90 min at 80 鈩，
本文编号：2363859
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