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Construction and Properties Evaluation of the Binary Flooding System Based on Lipid Peptide
Xiuxia Zhang1, Kangning Dong1, Feifei Qin1
1Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.
The Journal of Physical Chemistry. B
|October 23, 2024
Summary
This study developed an eco-friendly biosurfactant lipid peptide (TH) and chemical surfactant blend for enhanced oil recovery. The optimized system achieved ultralow interfacial tension, significantly improving oil displacement efficiency with excellent salt resistance.
Area of Science:
- Petroleum Engineering
- Surface Chemistry
- Materials Science
Background:
- Complex reservoir conditions necessitate advanced oil displacement systems.
- Reducing the environmental impact of chemical flooding is a key industry challenge.
- Biosurfactants offer a sustainable alternative for enhanced oil recovery (EOR).
Purpose of the Study:
- To develop an effective and environmentally friendly surfactant-polymer system for enhanced oil recovery.
- To investigate the synergistic effects of biosurfactant lipid peptide (TH) with chemical surfactants.
- To evaluate the performance of the developed system under various reservoir conditions.
Main Methods:
- Combinations of biosurfactant lipid peptide (TH) with four chemical surfactants were screened for ultralow interfacial tension (<10⁻² mN/m).
- Selected surfactant mixtures were combined with polyacrylamide (HPAM) to form binary oil displacement systems.
- Interfacial tension (IFT), surface activity, adsorption, salt resistance, and viscosity retention were evaluated.
- Simulated oil displacement experiments were conducted to determine recovery improvement.
Main Results:
- TH/OAB(2:1), TH/OAB(3:1), and TH/EAO(3:1) mixtures achieved ultralow interfacial tension.
- TH/OAB(2:1) and TH/EAO(3:1) exhibited superior surface activity, antidilution, and antiformation adsorption properties.
- The binary systems demonstrated excellent salt resistance in CaCl₂ and NaCl solutions.
- Oil washing rate reached up to 80.30% with TH/OAB(2:1).
- The developed systems showed higher recovery improvement compared to individual surfactant or polymer flooding.
Conclusions:
- The synergistic combination of TH with chemical surfactants effectively reduces interfacial tension for enhanced oil recovery.
- The developed surfactant-polymer systems exhibit excellent performance, including salt resistance and high oil recovery efficiency.
- This study provides a promising, alkali-free alternative for tertiary oil recovery applications.
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