Foam Flooding after Polymer Flooding: Displacement Characteristics Studied by NMR Spectroscopy

Chinese Journal of Magnetic Resonance ›› 2010, Vol. 27 ›› Issue (2): 221-229.

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Foam Flooding after Polymer Flooding: Displacement Characteristics Studied by NMR Spectroscopy

ZHAO Jin-Sheng¹, LI Tian-Ta¹, ZHANG Ming¹, TAO Rui-Feng², LI Zhao-Min³

1. College of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, China;
2. Gas Production Plant No.3, Changqing Oilfield Company, Wushenqi 017300, China;
3. College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China

Received:2009-06-29 Revised:2009-12-17 Online:2010-06-05 Published:2010-06-05
Supported by:
国家自然科学基金资助项目（50876115）, 西安石油大学科技基金资助项目(YS29030808).

Abstract

Abstract:

The displacement process during foam flooding after polymer flooding was studied experimentally with parallel cores with different permeability contrast. The fluid distribution in cores was measured by NMR spectroscopy after water flooding, polymer flooding and foam flooding under different processes and various heterogeneity conditions. The distribution area of the bores from which oil was swept out was calculated. The results showed that foam flooding can sweep bores with a wider range of aperture, and bores in which waterchanneling and/or polymer-channeling may occur. Foam can swept oil out from the bores that cannot be reached by water and polymer flooding. In conclusion, foam flooding can not only improve the oil recovery from low permeability cores but also sweep the oil out from microbores in the cores with high permeability.

Key words: nuclear magnetic resonance, polymer flooding, foam, bore diameter, displacement characteristics

CLC Number:

ZHAO Jin-Sheng, LI Tian-Ta, ZHANG Ming, TAO Rui-Feng, LI Zhao-Min. Foam Flooding after Polymer Flooding: Displacement Characteristics Studied by NMR Spectroscopy[J]. Chinese Journal of Magnetic Resonance, 2010, 27(2): 221-229.

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Foam Flooding after Polymer Flooding: Displacement Characteristics Studied by NMR Spectroscopy

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