Effect of Dynamic Gelation of Polymer Gel in Porous Media: Permeability

Polymer gel is widely used in water shut-off and profile control. For success of conformance treatment, it is very important to study the dynamic gelation process of polymer gel, especially in porous media. Based on the systems of HPAM/ phenol formaldehyde resin (PFR), the dynamic gelation process in porous media was studied in an unconsolidated sandpack of the circulating device. The results showed that dynamic gelation time was much longer than static gelation time in ampoule bottle and porous media. With permeability increasing or injected speed decreasing, the dynamic initial gelation time increased but the dynamic initial gelation time varied unconspicuously. In dynamic gelation process, the system of HPAM/ PFR could be injected into in-depth of reservoir more easily. The relationship between permeability and apparent viscosity was in accordance with equation y=a (1-e-bx). The apparent viscosity after dynamic gelation was in contrast with linear velocity of b.