Evaluation of Dispersion Stability and Plugging Characteristics of New Salt-Resistant Profile Control Agent System
With the continuous development of oil fields in China,many high-temperature and high-salt reservoirs have appeared one after another,and the harsh reservoir environment requires more and more profile control agents.The dispersion stability,interface properties,viscosity and plugging properties of SPFR/AP-P4 system were studied by turbidimeter,interfacial tensimeter,viscosimeter,microporous membrane filtration test and sand tube plugging test.It was found that,when the mass concentration of sulfomethyl phenolic resin in the dispersion system was 1 000 mg·L-1 and the mass fraction of NaCl was 1.5×105 mg·kg-1,with the increase of AP-P4 mass fraction,the stability of the system increased,the interfacial tension decreased,the viscosity increased,and the plugging ability increased.Therefore,SPFR/AP-P4 system is a new salt-resistant profile control agent with good dispersion stability,plugging ability and migration ability.
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