西南石油大学学报(自然科学版)

Previous Articles     Next Articles

The Mobilization Mechanism of Residual Oil by Marangoni Convection Caused by Binary Flooding

Luo Litao1,2,3*, Liu Xiangui3, Liao Guangzhi4, Liu Weidong3, Cui Bin5   

  1. 1. Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang,Hebei 065007,China
    2. University of Chinese Academy of Sciences,Shijingshan,Beijing 100190,China
    3. Langfang Branch of Research Institute of Petroleum Exploration and Development,CNPC,Langfang,Hebei 065007,China
    4. PetroChina Exploration & Production Company China,Dongcheng,Beijing 100011,China
    5. East China Company,SINOPEC,Nanjing,Jiangsu 210019,China
  • Online:2015-08-01 Published:2015-08-01

Abstract:

Marangoni convection of the binary flooding plays an important role in mobilizing residual oil in reservoir. Researches
on the microscopic mechanism will contribute to the application of binary flooding to enhanced oil recovery. In this paper,
the authors used Na2CO3 solution,KPS surface active agent solution and mixed solution to contact with crude oil respectively.
The experiments verified their marangoni convection effect. Microscopic simulation model of oil displacement experiment was
made with Na2CO3 and KPS binary flooding that result in strong Marangoni convection. The results show Na2CO3 solution,
KPS surface active agent solution and mixed solution could all have marangoni convection effect. The greater the concentration
is,the better the effect of marangoni convection is. Na2CO3 and KPS have synergy for marangoni convection.The binary
flooding mixed with 1.2% Na2CO3 and 0.3% KPS can cause the interfacial turbulence and spontaneous emulsification. It has a
significant effect on mobilizing residual oil in membrane,island and blind side. The binary flooding which can produce strong
marangoni convection should be used in the oil field.

Key words: binary flooding, Marangoni convection, residual oil, interfacial turbulence, spontaneous emulsification