Experimental Study on Oil Displacement of Aqueous Dispersion System of
Nano/Micron-sized Polymer Particles in Heterogeneous Reservoir

doi:10.11885/j.issn.1674-5086.2014.12.22.02

Abstract

Abstract:

In order to reveal deeply the effects of heterogeneity to oil displacement effect of aqueous dispersion system of
nano/micron-sized polymer particles in low permeability reservoir，heterogeneous oil displacement experiments of nano/micronsized
polymer particle were conducted by plane sandpack model and cores series and parallel combination experiment technology.
The influences of vertical heterogeneity，lateral heterogeneity and permeability ratio on oil displacement effect were
analyzed. The experimental results of plane sandpack models show aqueous dispersion system of nano/micron-sized polymer
particles reduces vertical heterogeneity of low permeability reservoir more effectively，with 9.83% higher recovery rate than in
the lateral heterogeneous models. The experimental results of core combination models show the recovery rates improved by
the aqueous dispersion system of nano/micron-sized polymer particles in cores series and parallel combination models increase
gradually with increasing permeability ratio，which have a growth of 6.65% in the core is series ones and a growth of 9.48% in
the parallel combination ones. The bigger the permeability ratio is，the greater the difference of fluid productions in low and
high permeability cores is. After the aqueous dispersion system of nano/micron-sized polymer particles injected into cores，the
fluid productions reduce gradually in high permeability cores and increase by degrees in low permeability cores.

Key words: heterogeneous reservoir, nano/micron-sized polymer particle, oil displacement effect, permeability ratio, diversion
adjustment ability

Long Yunqian1*, Zhu Weiyao2, Huang Xiaohe3, Wu Junjie1, Song Fuquan3. Experimental Study on Oil Displacement of Aqueous Dispersion System of
Nano/Micron-sized Polymer Particles in Heterogeneous Reservoir[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.12.22.02.

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