Gemini型阳离子表面活性剂在砂岩表面吸附及水润性研究  

ADSORBABILITY AND WETTABILIYY OF GEMINI CATIONIC SURFACTANT ON SANDSTONE SURFACES

作　　者：郭丽梅[1] 陈晴[1] 高静[1] 陈曦[2] 

机构地区：[1]天津科技大学材料科学与化学工程学院 [2]天津现代职业技术学院生物化工系

出　　处：《钻采工艺》2015年第5期81-84,11,共4页Drilling & Production Technology

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05013)

摘　　要：采用动态接触角法研究Gemini型阳离子表面活性剂改善亲水砂岩表面润湿性的能力,利用激光粒度仪考察其对亲水砂岩岩心粉zeta电位的改变,并使用原子力显微镜考察此表面活性剂在亲水云母表面的吸附形貌。结果表明,Gemini型阳离子表面活性剂在高低浓度下均能使亲水砂岩表面发生润湿反转且浓度影响不大;吸附Gemini型阳离子表面活性剂的岩心粉zeta电位由负变为正,且增大到一定值后不再变化;原子力显微镜图像显示发生润湿反转的本质主要是Gemini型阳离子表面活性剂在亲水固体表面形成单层吸附的结果,高浓度时伴随少量双层吸附。The wettability of double chained cationic surfactant(Gemini) on the surface of hydrophilic sandstone was studied by dynamic contact angle method,the zeta potential of hydrophilic sandstone powder was observed by laser particle size analyzer,and the adsorption morphology of double chained cationic surfactant on the surface of the hydrophilic mica was also observed by atomic force microscopy(AFM).The results showed that the reversal wettability occurred on the surface of the hydrophilic sandstone under the high and low concentration of Gemini.Moreover,the concentration had little effect.The zeta potential of hydrophilic sandstone powder,which was effected by Gemini,changed from negative to positive,and stabilized at a certain value.The essence of the reversal wettability,which was deduced from the adsorption morphology obtained by AFM,was that Gemini occurred monolayer adsorption on the mica surface,and a small amount of bilayer adsorption at high concentration.

关 键 词：表面活性剂 润湿性 吸附 原子力显微镜 

分 类 号：TE39[石油与天然气工程—油气田开发工程]