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Interfacial and Colloidal Forces Governing Oil Droplet Displacement: Implications for Enhanced Oil Recovery

机译：界面和胶体力控制油滴位移：对提高采油率的影响

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Growing oil demand and the gradual depletion of conventional oil reserves by primary extraction has highlighted the need for enhanced oil recovery techniques to increase the potential of existing reservoirs and facilitate the recovery of more complex unconventional oils. This paper describes the interfacial and colloidal forces governing oil film displacement from solid surfaces. Direct contact of oil with the reservoir rock transforms the solid surface from a water-wet to neutrally-wet and oil-wet as a result of the deposition of polar components of the crude oil, with lower oil recovery from oil-wet reservoirs. To enhance oil recovery, chemicals can be added to the injection water to modify the oil-water interfacial tension and solid-oil-water three-phase contact angle. In the presence of certain surfactants and nanoparticles, a ruptured oil film will dewet to a new equilibrium contact angle, reducing the work of adhesion to detach an oil droplet from the solid surface. Dynamics of contact-line displacement are considered and the effect of surface active agents on enhancing oil displacement discussed. The paper is intended to provide an overview of the interfacial and colloidal forces controlling the process of oil film displacement and droplet detachment for enhanced oil recovery. A comprehensive summary of chemicals tested is provided.
机译：不断增长的石油需求和初次开采对常规石油储量的逐渐消耗，突显了对增强采油技术的需求，以增加现有油藏的潜力并促进更复杂非常规油的采收。本文描述了控制油膜从固体表面移位的界面力和胶体力。由于原油中极性成分的沉积，油与储层岩石的直接接触将固体表面从水润湿转变为中性润湿和油润湿，而从油润湿储层中的采收率降低。为了提高采油率，可以将化学药品添加到注入水中，以改变油水界面张力和固体油水三相接触角。在某些表面活性剂和纳米颗粒的存在下，破裂的油膜将润湿至新的平衡接触角，从而减少了将油滴从固体表面分离的粘附功。考虑了接触线位移的动力学，并讨论了表面活性剂对提高油位移的影响。本文旨在提供界面力和胶体力的概述，这些界面力和胶体力可控制油膜位移和液滴分离过程，从而提高采油率。提供了所测试化学品的全面摘要。

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