Synergistic thickening mechanism of surfactants and supramolecular inclusion systems
Zhou B. Kang W. Li X. Wang L. Yang H. Xu B. Jiang H. Sarsenbekuly B. Li Z.
1 November 2024Elsevier B.V.
Journal of Molecular Liquids
2024#413
The effectiveness of conventional polymer flooding systems for improving oil recovery (IOR) in high-temperature and high-salt reservoirs is greatly limited. The polymer inclusion system forms a spatial network structure through host–guest inclusion, which can achieve the goal of low concentration and high viscosity in high-temperature and high-salt environments. However, there are few reports on further enhancing the performance of polymer flooding systems based on the inclusion system. In this study, the optimal ratio of erucamide propyl betaine (EDAB) to polymer inclusion system (ABMN) was first investigated. The results showed that the optimal formulation for the synergistic enhanced inclusion system was 2000 mg/L ABMN+2000 mg/L EDAB, which could reach 95.7 mPa·s under 85 ℃ and salinity of 32868 mg/L, and the viscosity was more than twice that of the ABMN system. The wormlike micelles (WLMs) formed by EDAB synergistically interacted with the ABMN, resulting in a larger hydrodynamic radius and a denser spatial network structure. Due to the synergistic effect of supramolecular forces, the system has significantly improved its temperature resistance, salt resistance, and shear resistance, with a viscosity recovery rate of up to 98.9 %. This provides a new oil displacement system for IOR in high-temperature and high-salt reservoirs.
High salt and temperature tolerance , Rheological properties , Strong thickening mechanism , Supramolecular system , Wormlike micelles
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State Key Laboratory of Coking Coal Resources Green Exploitation, China University of Mining and Technology, Xuzhou, 221116, China
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
School of Energy and Petroleum Industry, Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Shengli Oil Production Plant of Shengli Oilfield Branch of Sinopec, Dongying, 257000, China
No.7 Oil Production Company of PetroChina Changqing Oilfield Company, Xian, 710000, China
College of Chemical Engineering and Safety, Shandong University of Aeronautics, Binzhou, 256600, China
State Key Laboratory of Coking Coal Resources Green Exploitation
School of Petroleum Engineering
School of Energy and Petroleum Industry
Shengli Oil Production Plant of Shengli Oilfield Branch of Sinopec
No.7 Oil Production Company of PetroChina Changqing Oilfield Company
College of Chemical Engineering and Safety
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