Abstract
The organic acid aluminate (AlOA) was used as a linked agent to enhance the viscosity of partially hydrolyzed polyacrylamide (HPAM) solution. The influencing factors, such as HPAM concentration, pH, temperature, and salinity on the linked polymer system were probed via the investigations on rheological properties, microstructure, and location of the linked polymer systems. The result show that the scattered gelatin particles are contained in the linked polymer network structure. The system behaves as mainly elasticity, and the system belongs to the linear viscoelastic fluid. For the solution with elasticity, its subsequent fluid not only has a boost effect on the front fluid, but also the front fluid has a stronger effect of “drawing” and “dragging” on its side and subsequent fluid. Therefore, it will be important in both theory investigation and the actual oil recovery.
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