An Easy Calculation Method on Sweep Efficiency of Chemical Flooding

Abstract:

According to the geological parameters of Shengli Oilfield, sweep efficiency of chemical flooding was analyzed according to injection volume, injection-production parameters of polymer flooding or surfactant-polymer compound flooding. The orthogonal design method was employed to select the important factors influencing on expanding sweep efficiency by chemical flooding. Numerical simulation method was utilized to analyze oil recovery and sweep efficiency of different flooding methods, such as water flooding, polymer flooding and surfactant-polymer compound flooding. Finally, two easy calculation models were established to calculate the expanding degree of sweep efficiency by polymer flooding or SP compound flooding than water flooding. The models were presented as the relationships between geological parameters, such as effective thickness, oil viscosity, porosity and permeability, and fluid parameters, such as polymer-solution viscosity and oil-water interfacial tension. The precision of the two models was high enough to predict sweep efficiency of polymer flooding or SP compound flooding.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 496-501
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.496
• Online since: January 2013
• Authors: Fu Qing Yuan, Zhen Quan Li
• Keywords: Numerical Simulation, Oil Recovery, Orthogonal Design, Polymer Flooding, SP Compound Flooding, Sweep Efficiency

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