聚合物溶液对孔隙结构特征的影响

doi:10.11743/ogg20120318

Abstract

Abstract:

Resistance coefficient & residual resistance factor of polymer solutions with different molecular weight and mass concentration were studied based on water flooding,polymer flooding and subsequent waterflooding tests.This paper also researched the pore structure characteristics of the cores after the polymer flooding by conventional mercury porosimetry,and analyzed the influences of polymer flooding with polymer solution of different molecular weight and mass concentration on pore structure of cores.The results show that the resistance coefficient and the residual resistance factor increase and the amplitude of permeability decline enlarges along with the increasing molecular weight and mass concentration of polymer solution.Capillary pressure curves were successively arranged from bottom left to top right,pore volume reduces at big pore throat but enlarge at smaller pore throat.The average pore radius & mean values,skewness,structure coefficient and uniformity coefficient show a decreasing trend.The above results have great significances for the research of post-polymer flooding EOR methods.

Key words: adsorption, retention, pore structure, resistance coefficient, polymer flooding, EOR

CLC Number:

TE357.4

Li Zhaoxia, Xia Huifen. Effect of polymer solution on pore structure characteristics[J]. Oil & Gas Geology, 2012, 33(3): 479-483.

References

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Effect of polymer solution on pore structure characteristics

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