Flow Characteristics of Nano/Micron-Sized Polymer Particles Aqueous#br#
Solution Through Microporous Membrane

doi:10.11885/j.issn.1674-5086.2014.01.07.01

Abstract

Abstract:

To evaluate percolation ability of aqueous dispersion system of nano/micron-sized polymer particles in low permeability
reservoir，the flow characteristic and its influence factors are studied by laser particle size analyzer and filtration
device of microporous membranes which are simulated as pore throat of low permeability reservoir. The results show that the
nano/micron-sized polymer particles have stronger plugging effect in hydration time of less than 120 h. After hydration time
of more than 120 h，deep profile control effect of nano/micron-sized polymer particles gradually increases. With increasing
pressure difference，nano/micron-sized polymer particles have stronger deep profile control effect which increases faster after
larger than pressure differentials of 0.15 MPa. When pore sizes of microporous membrane decrease，the filtration rate of polymer
particles decreases rapidly. Therefore polymer particles with particle size of 1.68µm have stronger plugging effect in the
0.45，0.80µm microporous membrane，but they have stronger deep profile control effect in 3.0μ m microporous membrane.
The deep profile control effect of nano/ micron-sized polymer particles decreases with increasing particle concentration. After
particles concentration increases to 2.0 g/L，the polymer particles already have no deep profile control effect.

Key words: nano/micron-sized polymer particles, microporous membrane, flow characteristic, plugging, deep profile control

CLC Number:

TE357.46

Long Yunqian1*, Zhu Weiyao2, Liu Qipeng3, Song Fuquan1. Flow Characteristics of Nano/Micron-Sized Polymer Particles Aqueous#br# Solution Through Microporous Membrane[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.01.07.01.

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Flow Characteristics of Nano/Micron-Sized Polymer Particles Aqueous#br# Solution Through Microporous Membrane

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