Among the methods available to reduce water production, injecting a gelling system composed of a ‎polymer and a crosslinker has been widely used. In this work a new hydrogels were prepared by cross-‎linking of aqueous solutions of sulfonated polyacrylamide/chromium triacetate. The effects of co-‎polymer and crosslinker concentration and ionic strength were investigated by dynamic shear method ‎‎(rheometer). Study of the viscoelastic behavior using dynamic rheometery showed that the limiting ‎storage modulus of the hydrogels increased with increasing co-polymer and crosslinker concentration ‎but its increasing effect from 1:5 to 1:2 crosslinker/co-polymer weight proportions on increasing ‎elastic modulus is negligible. The effect of aging on G'/G" proportion showed that crosslinking rate ‎decreases with increasing time. Water permeability for third water injection was about 1.8, while ‎relative permeability was about 52 for second oil injection. Thus these gels indicated DPR ‎‎(Disproportionate Permeability Reduction) and they are suitable candidates for water shutoff ‎conformance.‎


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