Preparation and Evaluation of a Profile Control Agent Base on Waste Drilling Fluid

Figure 4

SEM images of PCARW and PCAWDF: (a) PCARW at 40 μm, 1000x; (b) PCARW at 20 μm, 2000x; (c) PCARW at 5 μm, 5000x; (d) PCAWDF at 40 μm, 1000x; (e) PCAWDF at 20 μm, 2000x; (f) PCAWDF at 5 μm, 5000x.

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