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- W2363660138 abstract "The composition of insitu crosslinking/gelling polymer solution for indepth permeability profile control is studied experimentally. The polymer HPAM used has M=8.25×106 and HD=30.2%; the solution is prepared with distilled water; the viscosity of the gelling solution is determined at 60℃ in different time up to 45 d. Phenol+formaldehy de are selected as crosslinker from 3 phenols and 3 aldehydes. HPAM/phenol/formaldehyde solution (1 000+400+400 mg/L, pH=7.5) gelates in 20 days and the gelled solution is of low viscosity and poor stability. With a Al salt of citric acid (Al3+ concentration 50 and 80 mg/L) introduced the solution above mentioned gelates in 15 days and the gelled solution gets the highest viscosity of 1.0×105 mPa·s and maintains stable in 20 days. The same solution with AlCl3 added does not form gel. The influencing factors for the HPAM/phenol/formaldehyde/Al salt of citric acid solution of composition in mg/L 800+400+400+50 (as Al3+) are investigated and it is shown that the gelling solution can be used at ～60℃ and pH range 7.0-7.5 only and its performane does not change much in the medium of water salinity 6 390 mg/L." @default.
- W2363660138 created "2016-06-24" @default.
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- W2363660138 date "2003-01-01" @default.
- W2363660138 modified "2023-09-25" @default.
- W2363660138 title "Study on Aqueous HAPM/Phenol/Formaldehyde/Al Citrate Crosslinking/Gelling System" @default.
- W2363660138 hasPublicationYear "2003" @default.
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