Reservoir Evaluation and Development ›› 2018, Vol. 8 ›› Issue (6): 51-56.

• Petroleum Engineering • Previous Articles     Next Articles

Study on migration change rule of alkali/surfactant/polymer system in porous media

Wang Yuanyuan1,Song Kaopin1,Liu Jian2,Shen Qiuyu3,Zhou Jilong4,Yu Tao5   

  1. 1. Key Laboratory of Enhanced Oil and Gas Recovery of Education Ministry, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
    2. No. 9 Oil Production Plant of Daqing Oilfield Company, CNPC, Daqing, Heilongjiang 163853, China
    3. No. 2 Oil Production Plant, Northwest Oilfield Company, SINOPEC, Luntai, Xinjiang 841604, China
    4. Xinjiang Oil Production Plant of Henan Oilfield Company, SINOPEC, Yili, Xinjiang 833200, China
    5. No. 4 Oil Production Plant of Daqing Oilfield Company, CNPC, Daqing, Heilongjiang 163853, China
  • Received:2018-01-15 Online:2018-12-26 Published:2018-12-13


In order to further explore the migration rule of alkali/surfactant/polymer(A/S/P) system in the reservoir, guided by the reservoir engineering, surfactant chemistry and oilfield chemistry, and aimed at the fluid properties and geological characteristics, we conducted the research on change rule of viscosity, IFT tension and displacement effect of A/S/P system, and discussed the relative mechanism based on the dynamic testing result of single component concentration of compound system. The results showed that during the displacement process of A/S/P system, the polymer, surfactant and alkali presented different along-range retention characteristics, the chromatographic separation phenomenon occurred, the decrease rate of surfactant concentration was much higher than that of polymer and alkali, and both the ultra-low interfacial tension and high viscosity could only keep the length of 1/3 well distance. The contribution rate of ultra low tension was limited in the A/S/P flooding; about 60 % oil was not recovered by compound system under the condition of ultra low tension. If the A/S/P system can keep lower IFT and give consideration to proper viscosity, we can acquire the better displacement effect.

Key words: alkali/surfactant/polymer(A/S/P) compound flooding, component concentration, viscosity, interfacial tension, displacement effect

CLC Number: 

  • TE357