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Effect of pH-values on the contact angle and interfacial tension

机译：pH值对接触角和界面张力的影响

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Djelovanje pH vrijednosti na kontaktni kut i me?ufaznu napetost%As the reservoir production continues, the reservoir pressure is reduced with time and some of the reservoirrnoil remains as a residue that cannot be produced by classic means. Enhancing oil recovery (EOR)rntechniques; in this period of reservoir life; become more and more important due to the increase in demandrnof the world for energy.rnNumerous EOR techniques are used in order to increase the oil recovery. One of the effective EOR techniquesrnis the surfactant flooding. Surfactant is used to reduce the interfacial tension (IFT) between oil/waterrnallowing them to mix and being displaced as one phase. But it is known that the surfactant is very expensive.rnHowever, using surfactant is not the only way to reduce the IFT. Generally, the reservoir oil is acidic byrnnature, and it contains a nature surface active agents. So, mixing the oil which is acidic by an alkaline willrnform in-situ surfactant that will reduce the IFT between oil/water. This process is called as "AlkalinernFlooding" which is one of the useful EOR techniques and economically efficient than using the expensivernsurfactant.rnReducing the IFT is our objective to enhance the oil recovery. Therefore, a literature review of surfacerntension and IFT, factors affecting the IFT, alkaline flooding technique, and effect of pH on the IFT arernincluded.rnFurthermore, experimental work is done for viscosity using the Brookfield viscometer, IFT by Digitalrndensitometer K-10 to show the effect of pH on the IFT, and density is measured also.rnThree samples are used for experimental work. Arabian light sample, Udheiliyah sample, and finallyrnAsphaltenic oil sample.
机译：随着油藏生产的继续，油藏压力会随着时间的推移而降低，并且一些油藏仍作为残留物残留，无法通过传统方式生产。增强石油采收率（EOR）技术；在这段水库寿命中；由于世界对能源的需求增加，这一点变得越来越重要。为了提高石油采收率，人们采用了多种EOR技术。有效的EOR技术之一是表面活性剂驱油。表面活性剂用于降低油/水之间的界面张力（IFT），使它们混合并作为一相置换。但是，已知表面活性剂非常昂贵。然而，使用表面活性剂并不是降低IFT的唯一方法。通常，储层油是酸性的，它含有天然的表面活性剂。因此，将酸性油与碱性原位表面活性剂混合成酸性，会降低油/水之间的IFT。此过程称为“碱性驱油”，它是一种有用的EOR技术，比使用昂贵的表面活性剂具有更高的经济效益。降低IFT是我们提高采油量的目标。因此，包括表面张力和IFT，影响IFT的因素，碱性驱油技术以及pH对IFT的影响的文献综述。此外，使用Brookfield粘度计，Digitalrndensitometer K-10的IFT对粘度进行了实验工作，以显示pH对IFT的影响，并测量密度。rn三个样品用于实验工作。阿拉伯轻质样品，Udheiliyah样品，最后是天麻油样品。

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