Yousefrooz Amin, Shabani Mohammad Hossein, Jafari Arezou, Fakhroueian Zahra, Manteghian Mehrdad
Petroleum Engineering Department, Chemical Engineering Faculty, Tarbiat Modares University, Tehran, Iran.
School of Chemical Engineering, College of Engineering, IPE, University of Tehran, Tehran, Iran.
Sci Rep. 2025 Apr 4;15(1):11607. doi: 10.1038/s41598-025-94997-w.
The production rate of many oil fields has been decreased during recent years. Various old chemical methods have been used to exploit oil reservoirs, such as the use of polymers, surfactant-polymer (SP), and alkaline/surfactant/polymer (ASP). Among all the enhanced oil recovery methods, polymeric surfactants had excellent function for enhance oil recovery (EOR) purposes. This study presents significant research about the influence of sodium dodecyl sulphate (SDS) on the adsorption properties of non-ionic polyvinyl alcohol (PVA) polymer. In other words, the surfactant was placed on the polymer through a direct acid-base reaction in the form of a chemical grafting via the reflex and hydrothermal process for the first time. With this evidence, the surface of PVA polymer was modified and activated by anionic SDS surfactant and could reduce interfacial tension (IFT) from 29 (mN/m) to 6 (mN/m) at concentration of 3500 ppm. Also, viscosity increased from 14 cp. at 2000 ppm concentration to 23cp at 3500 ppm. In addition, the SDS@PVA hybrid could increase recovery up to 57% in micromodel flooding tests and presented great properties and high oil recovery in micromodel tests which indicates that it is very suitable for EOR process.
近年来，许多油田的产量有所下降。人们使用了各种传统化学方法来开发油藏，例如使用聚合物、表面活性剂-聚合物（SP）以及碱/表面活性剂/聚合物（ASP）。在所有提高采收率的方法中，聚合物表面活性剂在提高采收率（EOR）方面具有出色的功能。本研究针对十二烷基硫酸钠（SDS）对非离子型聚乙烯醇（PVA）聚合物吸附性能的影响展开了重要研究。换句话说，首次通过回流和水热过程以化学接枝的形式，通过直接酸碱反应将表面活性剂置于聚合物上。基于此，PVA聚合物的表面被阴离子SDS表面活性剂改性和活化，在浓度为3500 ppm时，界面张力（IFT）可从29（mN/m）降至6（mN/m）。此外，粘度从浓度为2000 ppm时的14 cp增加到3500 ppm时的23 cp。另外，在微观模型驱油试验中，SDS@PVA杂化物可使采收率提高至57%，并且在微观模型试验中表现出优异的性能和较高的采收率，这表明它非常适合提高采收率过程。
