Polyetheramine enhanced biosurfactant/biopolymer flooding for enhanced oil recovery

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2024-08-13 DOI:10.1016/j.molliq.2024.125757

Lipei Fu , Zhangkun Ren , Wenzheng Chen , Qingling Liu , Meng Ye , Xinxin Qiu , Yan Zhang , Yufei Zheng , Kaili Liao , Minglu Shao

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Abstract

The application of conventional alkali, surfactant and polymer in alkali/surfactant/polymer (ASP) flooding has exposed the inherent shortcomings of pollution and damage to reservoirs. Hence, finding new environmentally friendly alternatives is essential for the sustainable development of ASP flooding. In this paper, we proposed a novel ternary combination utilizing organic alkali polyetheramine, biosurfactant, and biopolymer as alternative chemical agents for ASP flooding. Specifically, the ASP system composed of polyetheramine D230, biosurfactant sophorolipid (SL) and biopolymer welan gum (WLG) exhibited excellent potential in improving oil recovery. The interfacial tension measurements proved that D230 could react with organic acids in crude oil to generate surface-active soaps, which cooperated with SL to reduce the oil–water interfacial tension to 10⁻² mN/m. The rheological measurements demonstrated that the addition of D230 could increase the viscosity of low concentration WLG solution, but this phenomenon gradually disappeared with the rise of WLG concentration. Even at higher WLG concentration, D230 only caused a slight decrease in system viscosity, which facilitated the improvement of sweep efficiency. Emulsification and contact angle measurements indicated that D230/SL blend had outstanding emulsifying ability and successfully altered the quartz surface from oil-wet to water-wet. Core flooding experiments and micromodel experiments showed that the D230/SL/WLG system significantly enhanced oil recovery by 22.66 %, which was attributed to the high viscosity, low interfacial tension, excellent wettability reversal and emulsifying abilities of the system. The economic benefit assessment indicated that this ASP system has the potential to be economic, rendering it profitable even during periods of low oil prices. Furthermore, the EC₅₀ value of 52,600 mg/L for D230/SL/WLG demonstrated its environmental friendliness.

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用于提高石油采收率的聚醚胺增强型生物表面活性剂/生物聚合物淹没法

在碱/表面活性剂/聚合物（ASP）淹没中应用传统的碱、表面活性剂和聚合物，暴露出了污染和破坏水库的固有缺点。因此，寻找新的环境友好型替代品对于碱/表面活性剂/聚合物（ASP）淹没技术的可持续发展至关重要。本文提出了一种新型的三元组合，利用有机碱聚醚胺、生物表面活性剂和生物聚合物作为 ASP 淹没的替代化学剂。具体而言，由聚醚胺 D230、生物表面活性剂槐脂（SL）和生物聚合物韦兰胶（WLG）组成的 ASP 系统在提高石油采收率方面表现出卓越的潜力。界面张力测量证明，D230 可与原油中的有机酸反应生成表面活性皂，与 SL 配合将油水界面张力降至 10-2 mN/m。流变学测量结果表明，添加 D230 可以增加低浓度 WLG 溶液的粘度，但这种现象随着 WLG 浓度的增加而逐渐消失。即使在 WLG 浓度较高的情况下，D230 也只能使系统粘度略有下降，这有利于提高扫频效率。乳化和接触角测量结果表明，D230/SL 混合物具有出色的乳化能力，成功地将石英表面从油湿型转变为水湿型。岩心淹没实验和微模型实验表明，D230/SL/WLG 体系显著提高了 22.66% 的采油率，这归功于该体系的高粘度、低界面张力、出色的润湿反转和乳化能力。经济效益评估表明，这种 ASP 系统具有经济潜力，即使在低油价时期也能盈利。此外，D230/SL/WLG 的 EC50 值为 52,600 mg/L，这也证明了它对环境的友好性。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.