Application of magnetic nanoparticles as demulsifiers for surfactant‐enhanced oil recovery
Application of magnetic nanoparticles as demulsifiers for surfactant‐enhanced oil recovery
复制标题
DOI：
10.1002/jsde.12658
复制
发表时间：
2023-01
影响因子：
1.6
通讯作者：
Leilei Zhang;Chutian Bai;Zhuqing Zhang;Xinglin Wang;Thao Vy Nguyen;Eric D Vavra;M. Puerto;G. Hirasaki;S. Biswal
中科院分区：
文献类型：
--
作者：
Leilei Zhang;Chutian Bai;Zhuqing Zhang;Xinglin Wang;Thao Vy Nguyen;Eric D Vavra;M. Puerto;G. Hirasaki;S. Biswal
非离子表面活性剂由于其稳定性和在矿物表面的低吸附性而越来越多地应用于石油开采过程。然而，这些表面活性剂导致产生乳化油，其极其稳定并且难以通过常规方法分离。研究了原油与非离子表面活性剂L24-22在盐水溶液中的混合稳定性。当进行重力分离时，对于各种水油比，产生中间富油和底部富水乳状液。热处理可以有效地打破富油乳状液，但底部水层仍然被微米级原油液滴污染。磁性纳米颗粒处理显示出对原油乳液进行破乳，将水层中的总有机碳（TOC）从1470 ppm降至30 ppm。
Nonionic surfactants are increasingly being applied in oil recovery processes due to their stability and low adsorption onto mineral surfaces. However, these surfactants lead to the production of emulsified oil that is extremely stable and difficult to separate by conventional methods. This research characterizes the stability of crude oil mixed with a nonionic surfactant, L24–22, in a brine solution. When subjected to gravity separation, a middle oil‐rich and bottom water‐rich emulsion are generated for various water–oil ratios. Thermal treatments can effectively break oil‐rich emulsions, but the bottom water layer remains contaminated with micron‐sized crude oil droplets. A magnetic nanoparticle treatment is shown to demulsify the crude oil emulsions, dropping the total organic carbon (TOC) in the water layer from 1470 to 30 ppm.