Ebrahimi Arash, Kazemzadeh Yousef, Akbari Ali
Department of Petroleum Engineering, Faculty of Petroleum, Gas, and Petrochemical Engineering, Persian Gulf University, Bushehr, Iran.
Heliyon. 2024 Oct 30;10(21):e39919. doi: 10.1016/j.heliyon.2024.e39919. eCollection 2024 Nov 15.
The occurrence of the Marangoni phenomenon is due to the surface tension gradient within a system, resulting in the creation of a convective flow from low surface tension to high surface tension points. This phenomenon arises from changes in solvent concentration, temperature and electric charge. In the context of the enhanced oil recovery (EOR) process, changing solvent concentration at the interface of two fluids in matrix fracturing systems caused by gas injection (in immiscible, immiscible and near-miscible conditions) and surfactant flooding, can enhance oil recovery by increasing the Marangoni effect. This article presents a comprehensive overview of the Marangoni phenomenon in oil recovery and the first investigation of this effect in conjunction with other related phenomena. The findings demonstrate that the Marangoni flow is not only present but also significantly impacts bypass oil recovery. The magnitude of the Marangoni effect is directly proportional to the absolute value of the temperature and concentration gradient at the interface. Despite being less recognized in petroleum engineering, this phenomenon has the potential to recover bypassed oil in both the matrix and low permeability zones. Experimental data indicates that under favorable conditions, the Marangoni phenomenon can increase the amount of EOR by approximately 35 %.
马兰戈尼现象的出现是由于系统内的表面张力梯度，导致形成从低表面张力点到高表面张力点的对流。这种现象源于溶剂浓度、温度和电荷的变化。在强化采油（EOR）过程中，气体注入（在不混溶、部分混溶和近混溶条件下）和表面活性剂驱油导致基质压裂系统中两种流体界面处溶剂浓度的变化，可通过增强马兰戈尼效应来提高采油量。本文全面概述了采油中的马兰戈尼现象，并首次结合其他相关现象对该效应进行了研究。研究结果表明，马兰戈尼流不仅存在，而且对旁通油的采收有显著影响。马兰戈尼效应的大小与界面处温度和浓度梯度的绝对值成正比。尽管在石油工程中该现象的认知度较低，但它有潜力在基质和低渗透区采收旁通油。实验数据表明，在有利条件下，马兰戈尼现象可使强化采油量增加约35%。
