TITLE:
Study on Optimization of Polymer Enhanced Foam Formulation System
AUTHORS:
Meinan Wang, Yuejie Wang, Hongyou Zhang, Xiaoyan Yang, Xiaoming Chen
KEYWORDS:
Enhanced Foam, Polymer Concentration, Surfactant Concentration, Gas-Liquid Ratio
JOURNAL NAME:
Engineering,
Vol.15 No.11,
November
23,
2023
ABSTRACT: Taking the pilot test area of polymer enhanced foam
flooding in Y oilfield as the prototype, a numerical core model was
established, and the polymer enhanced foam formulation system was optimized by
analyzing the resistance factor and the change rule of oil recovery of
different formulation systems. Research shows that the higher the polymer
concentration, the greater the resistance factor, and the more obvious the
sealing effect formed in the formation. The concentration of surfactant has a
greater impact on the resistance factor. With the increase of surfactant
concentration, the resistance factor increases significantly, and the plugging
effect of foam agent on core is significantly enhanced. With the increase of
gas-liquid ratio, the resistance factor first increases and then decreases.
When the gas-liquid ratio is 1:1, the resistance is the largest, and the foam
agent has the strongest plugging effect on the core. The optimal formula system
of polymer enhanced foam flooding in Y oilfield is: polymer concentration is
1200 mg/L, surfactant concentration is 0.25 wt%, gas-liquid ratio is 1:1.