Xinjiang Petroleum Geology

Xinjiang Petroleum Geology ›› 2009, Vol. 30 ›› Issue (2): 241-243.

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A Study of Alkali Free Polymer-Surfactant Compound System for EOR

LI Zhao-xia1, 4, ZHANG Xin-chun2, LIU Ren-qiang3, MA Wen-guo1   

  1. 1. Faculty of Resources, China University of Geosciences, Beijing 100083, China;
    2. MOE Key Laboratory of Enhancing Oil and Gas Recovery, Daqing Petroleum Institute, Daqing, Heilongjiang 163318, China;
    3. Research Institute of Exploration and Development, Daqing Oilfield Company Ltd., PetroChina, Daqing, Heilongjiang 163453, China;
    4. Research Institute of Petroleum Exploration and Development,Sinopec, Beijing 100083, China
  • Received:2008-07-16 Revised:2008-09-19 Online:2009-04-01 Published:2020-08-25

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Abstract: ASP compound flooding with alkali arouses dispersion and migration of in-situ clay, forming alkali scale leading to formation permeability loss, viscoelasticity decrease of polymer solution, and thus reducing sweep efficiency. This paper presents the alkali free polymer-amphoteric surfactant compound system for EOR by visible simulation and artificial core oil-displacement experiments. The study shows that the mobility control characteristic of polymer and the ultra interfacial tension characteristic of surfactant can be fully utilized in residual oil displacement after water flooding, indicating the sweep efficiency of such a system is higher than that of single surfactant system or single polymer system.

Key words: polymer, surfactant, recovery, experiment, test

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