西南石油大学学报(自然科学版) ›› 2013, Vol. 35 ›› Issue (1): 106-109.

• 石油与天然气工程 • Previous Articles     Next Articles

Experimental Research on Combination Flooding System for EOR inYangsanmu Heavy Oil Reservoir

Yi Xiangyi1, Li Jiansong1, Wang Hongbo2   

  1. 1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation，Chengdu University of Technology，Chengdu，Sichuan，610059，China2. Sixth Oil Production of Dagang Oilfield Company，CNPC，Cangzhou，Hebei，061100，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-02-01 Published:2013-02-01

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Abstract: A surfactant-polymer（SP）system screened by interfacial tension experiments and Emulsifying test is prepared for
EOR in view of Yangsanmu heavy oil reservoir. This system is composed of a surfactant（PS-2）with a density of 2 000 mg/L and
HPAM with a density of 1 000 mg/L，which can reduce the oil-water interfacial tension to the magnitude of 10􀀀2 mN/m and form
stable water-in-oil（W/O）emulsion with a water separation rate of 10.8% and a viscosity-reducing rate of 95.8% for 60 min.
Core flow experiments demonstrate that the enhanced recovery of three different systems referring to SP，single polymer and
single surfactant system is 15.7% ，10.8% and 7.9% respectively when 0.3 PV flooding system was injected. Thus，SP system
is the best for EOR in Yangsanmu heavy oil reservoir，and is also helpful to applied to improve oil recovery for ordinary heavy
oil reservoir

Key words: heavy oil, surfactant, polymer, combination flooding