西南石油大学学报(自然科学版)

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An Experimental Study on Anti-channeling Technology with Foam in#br# CO2 Flooding

Liu Zupeng1*, Li Zhaomin2   

  1. 1. Petroleum Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257015,China
    2. College of Petroleum Engineering,China University of Petroleum,Qindao,Shandong 266555,China
  • Online:2015-10-01 Published:2015-10-01

Abstract:

In the pilot test of CO2 flooding in Yaoyingtai Oilfield,early CO2 channeling decreased its sweeping volume and
production capacity. Low permeability fractured core models were generated by core cutting technique. The foam blocking
ability and flooding performance were measured by core flooding experimental apparatus and the effects of different foam
injection schemes on foam plugging and EOR results of foam displacement following water and gas flooding were conducted.
The experiment results show that CO2 foam can increase fluid flow resistance in the fracture,reduce liquid motility effectively
with resistance factors between 46∼80;there is a foam apparent viscosity in the fracture that has an impact on the initial flow of
foam;for the oil saturated fractured cores flooded by water and gas,oil recovery was increased by 26% and 35% respectively
and the mechanism of CO2 foam EOR in low permeability fractured reservoirs are revealed.

Key words: low-permeability fractured reservoir, foam plugging, enhanced oil recovery, foam flooding

CLC Number: