摘要
通过研究电解质种类和体系pH值对油/水界面张力、水相与原油表面的亲和能力、矿物粉末表面的双电层特性、岩石对离子吸附性能的影响,探讨离子组成以及体系的pH范围对油/水、水/岩石界面行为的调控作用,考察了电解质对油/水界面以及岩石矿物/水相界面的影响。随着pH值升高,在不同的电解质溶液中,油/水界面张力均呈现出降低的趋势,同时在油膜表面形成的接触角均有一定程度的降低。研究发现,Mg2+对油/水界面性质的影响较为明显;pH值和电解质质量分数对蒙脱土表面的zeta电位产生了不同程度的影响;Na+和蒙脱土晶体层间的Ca2+进行了交换吸附,并且影响其层柱结构,对晶格的压缩作用增强。
The influences of electrolytes and pH in the system,water and affinity on oil surface,the dual electric characteristics on the surface of mineral powder and rock on ionic adsorption ability were studied,the control of ionic composition and pH range on oil-water and water-solid interfaces was discussed,and influence of the electrode on oil/water interface was investigated.With the increase of pH,the oil-water interface is reduced in different electrodes,and at the same time,the contact angle formed on oil film surface is reduced at certain extent.Study shows that Mg2+has obvious influence on oil-water interface,pH values and mass fraction of electrodes have different effects on the zeta potential of montmorillonite surface,Na+is exchanged with Ca2+of montmorillonite crystal,which influences the interlayer structure and enhances the compression of crystal lattice.
出处
《石油天然气学报》
CAS
CSCD
2013年第9期96-101,1,共6页
Journal of Oil and Gas Technology
基金
国家重点基础研究发展计划项目(2012CB723601)
关键词
电解质
油
水界面
固
液界面
PH值
electrolyte
oil-water interface
solid-liquid interface
pH
