Page 157 - 201810

第 35 卷第 10 期 精 细 化 工 Vol.35, No.10
2018 年 10 月 FINE CHEMICALS Oct. 2018

油田化学品与油品添加剂
注入水成分对油藏中液固界面 Zeta 电位的影响

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叶仲斌 1,2 ，徐金腾 ，印风军 ，施雷庭 ，陈 洪 ，李亚丽
（1. 西南石油大学 石油与天然气工程学院，四川 成都 610500；2. 西南石油大学 化学化工学院，四川
成都 610500）
摘要：为了研究低矿化度水成分对油藏中岩石和原油表面带电量、润湿性、油膜脱附量的影响及三者间的关系，
配制了离子类型、离子质量浓度、溶液 pH 不同的低矿化度水，并分别将其与模拟岩石和原油样品混合后测定
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Zeta 电位值、与含油岩心切片接触测表面润湿角、与含油岩石颗粒混合测表面油膜脱附量。结果表明，Na 、
2+
2+
Ca 和 Mg 溶液对原油和岩石表面带电量的影响主要取决于离子价态，二价离子对其带负电量影响更大。同种
离子，随着离子质量浓度的增加，原油和岩石表面负电量减小。pH 升高对原油和岩石表面带电量的影响与溶液
2+
+
2+
所含离子的价态和水解性有关，Ca 、Mg 溶液所测得的负电量比 Na 溶液低，且随着 pH 的增加带负电量呈现
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先增大后减小的趋势，这种趋势与 Na 不同。此外，低矿化度水成分变化对原油和岩石表面带电量的影响规律
与对油膜脱附量的影响规律一致；当油藏液固界面 Zeta 电位的绝对值减小时，接触角增大、油膜脱附量减少。
关键词：油藏液固界面；低矿化度水；Zeta 电位；润湿角；油膜脱附量；油田化学品与油品添加剂
中图分类号：O646.1 文献标识码：A 文章编号：1003-5214 (2018) 10-1765-07

Effect of Injected Water Composition on Zeta Potential of
Liquid-Solid Interface in Reservoir

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YE Zhong-bin , XU Jin-teng , YIN-Feng jun , SHI Lei-ting , CHNE Hong , LI Ya-li
（1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China; 2.
School of Petroleum and Gas Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China）
Abstract: In order to study the effect of low-salinity water composition on the surface charge, wettability
and oil film desorption capacity of rock and crude oil as well as the relationship among them, a series of
low-salinity water with different ions, different ion mass concentrations and different pH were prepared.
Then, these samples were mixed with simulated rocks and crude oil samples to measure Zeta potential,
solid/brine water/crude oil three-phase contact angle and oil film desorption capacity on the surface of rock
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2+
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particles, respectively. The results showed that the effects of Na , Ca and Mg on the surface charges of
crude oil and rock mainly depended on the ionic valence state, and the divalent ions had a more significant
influence on the negative charge. Moreover, the negative charges detected in solutions of the same ions
decreased with the increase of the concentration of ions. The effect of pH increasing on negative charge was
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related to the ionic valence state and hydrolysis of solution. The negative charges measured in Ca or Mg
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solution were less than that of Na solution, and increased initially and then decreased with the pH
increasing, which was different from the latter. Besides, the influence of compositional variation of
low-salinity water on the surface charges of crude oil and rock was consistent with the influence on the
interfacial contact angle and the oil film desorption capacity. When the absolute value of Zeta potential
decreased, the interfacial contact angle increased and the oil film desorption capability decreased.
Key words: liquid-solid interface in reservoir; low-salinity water; Zeta potential; contact angle; oil film
desorption capacity; oil field chemicals and petroleum additives

收稿日期：2017-08-18; 定用日期：2018-01-12; DOI: 10.13550/j.jxhg.20170677
基金项目：“十三五”国家科技重大专项项目（2016ZX05025-003）
作者简介：叶仲斌（1966—），男，教授，博士。联系人：徐金腾（1992—），男，硕士生，电话：18702845340，E-mail：
201521000109@stu.swpu.edu.cn。