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第 10 期 叶仲斌，等: 注入水成分对油藏中液固界面 Zeta 电位的影响 ·1771·

后减小的趋势。当 pH 分别为 3、5、6、7、9 时，相 Abuja Nigeria, 2011.
[4] Nasralla R, Alotaibi M, Nasr-El-Din H. Efficiency of oil recovery by
应的原油脱附量分别为 3.87、4.01、4.38、4.10、3.66 mg
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和 3.41、4.16、5.33、4.68、3.53 mg。主要原因为， North American Region Meeting, Anchorage, Alaska, USA, 2011.
+
在酸性条件下，pH 的增加将引起溶液中 H 浓度减 [5] Mostafa Lashkarbolooki, Shahab Ayatollahi, Masoud Riazi. Effect of
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用减弱，H 中和表面负电荷能力减弱、净剩负电荷 55-61.
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致油膜的脱附能力增强。在碱性条件下，当 pH 增 Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 2010:
2+
2+
2+
加时，Ca 、Mg 的水解程度加大，相对于 Ca 、 24-28.
[7] Saeid Khorsandi, Changhe Qiao, Russell T Johns. Displacement
+
2+
Mg 而言，水解生成的一羟基络合物 Ca(OH) 和 efficiency for low salinity polymer flooding including wettability
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Mg(OH) 对表面的负电荷具有更强的中和能力，导 alterationns[R]. SPE Improved oil Recovery ,Oklahoma, USA, 2016.
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3 结论 [10] Tor Austad, Alireza Rezaei Doust, Tina Puntervold. Chemical
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Workshop & Symposium in Aberdeen, Scotland, 2010.
通过考察不同离子组成和 pH 的低矿化度水岩
[11] Petroleum Instrumentation Standardization Technical Committee（石
石和原油界面的 Zeta 电位的影响发现：随着溶液中 油仪器仪表标准化技术委员会）.General specifications for core
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对界面带电性影响更大；Na 溶液所对应的界面 Zeta 工进展), 2015, 34(7): 1853-1857.
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2+
2+
电位值随着 pH 的增加而减小，Ca 、Mg 溶液所对 伟), et al. Effect of different structure demulsifiers on surface
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当向储层中注入低矿化度水时，原油和岩石界面的 potential of sandstone surface[J]. Journal of Xian Shiyou University
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油与岩石之间的排斥作用增强，不利于原油在岩石 and its application[D]. Shenyang:Northeastern University (东北大
表面吸附，从而达到提高洗油效率的效果。 学), 2014.
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附量可以看出，三者之间的变化存在一定的相关性。
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