A Study on Permeability Curve Based on Polymer Elasticity in Porous Media

doi:10.11885/j.issn.16745086.2015.05.12.03

Abstract

Abstract: The relative permeability curve of polymer flooding is of great significance for a further understanding of the flow characteristics of polymer in porous media. However, existing studies have not fully considered the elasticity of polymer in porous media. An elasticity recovery experiment was performed to measure the pure viscous pressure difference after eliminating elasticity and to calculate the elastic viscosity of the polymer in the core. The elasticity of the polymer was introduced into the calculation of the relative permeability curve in the form of elastic viscosity. The results showed that the calculated relative permeability of the water phase is smaller when the elastic viscosity is not considered. The relative permeability curves of polymers with different molecular weights and at different concentrations were determined. The results showed that the elastic viscosity was greater for a higher molecular weight and concentration. The increase in the elastic viscosity increases the relative permeability of the oil phase, decreases the relative permeability of the water phase, and decreases the residual oil saturation. In addition, compared with the traditional J.B.N. method, the relative permeability curve calculated by this method is not affected by the flow rate and the calculation results are more reliable.

Key words: polymer flooding, relative permeability, Deborah number, elastic viscosity

CLC Number:

TE311

TANG Yongqiang, LÜ Chengyuan, HOU Jirui. A Study on Permeability Curve Based on Polymer Elasticity in Porous Media[J]. 西南石油大学学报(自然科学版), 2017, 39(4): 127-135.

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