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China Surfactant Detergent & Cosmetics ›› 2021, Vol. 51 ›› Issue (10): 932-938.doi: 10.3969/j.issn.1001-1803.2021.10.002

• Basic research • Previous Articles     Next Articles

Evaluation of enhanced oil recovery of the binary composite flooding system based on the sulfonate of kitchen waste oil and polyacrylamide

Wang Qihao1,Guo Haiyan2,Wang Yuyi1,Huang Xiaohe1,Zhang Ya1,Long Yunqian1,*()   

  1. 1. School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China;
    2. CNOOC Zhoushan Petrochemical Corporation Ltd., Zhoushan, Zhejiang 316000, China
  • Received:2020-12-19 Revised:2021-07-07 Online:2021-07-30 Published:2021-10-21
  • Contact: Yunqian Long E-mail:longyunqian@163.com

Abstract:

The salt of sulfonated kitchen waste oil (KWOS) was synthesized by sulfonation reaction. The interfacial performance between the KWOS solution and the crude oil was evaluated by measurement of interfacial tension, thermal stability, calcium and magnesium ion resistance and adsorption loss. The binary composite systems of polyacrylamide and KWOS were prepared to carry out oil displacement experiments at different permeabilities of core and various mass fraction of KWOS. The influences of core permeability and mass fraction of KWOS on the oil displacement were investigated. The results show that the interfacial tension between oil and water is gradually decreased with the increase of mass fraction of KWOS. When the mass fraction of KWOS reaches 0.175%, the interfacial tension between oil and water can be reduced to the order of magnitude of 10-3 mN/m. The interfacial tension between KWOS solution and crude oil is increased with the increase in thermal stability time, the total mass concentration of calcium and magnesium ions and the adsorption loss, but it can be still maintained in the order of 10-3 mN/m, indicative of a favorable adaptability to oil reservoir. With the decrease of core permeability and the increase of mass fraction of KWOS, the enhanced oil recovery of binary composite system first increases and then decreases. When the core permeability is 0.421 μm 2 and the mass fraction of KWOS is 0.3%, the binary composite system shows the highest enhanced oil recovery, illustrating that there are the best conditions for the binary composite system of polyacrylamide and KWOS in enhanced oil recovery.

Key words: kitchen waste oil, sulfonate, interfacial tension, binary composite flooding system, enhanced oil recovery

CLC Number: 

  • TQ423