Preparation and Performance Evaluation of Polymeric Microspheres Used for Profile Control of Low-Permeability Reservoirs

Figure 5

Polymeric microsphere solution after hydration and swelling in simulated formulation water over time. (a) Polymeric microsphere solution before aging in simulated formation water. (b) Polymeric microsphere solution after aging for 1 d. (c) Polymeric microsphere solution after aging for 5 d. (d) Polymeric microsphere solution after aging for 10 d. (e) Polymeric microsphere solution after aging for 15 d. (f) Polymeric microsphere solution after aging for 20 d.

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