Table 2 The parameter range of plugging-selection ball.

From: Migration and plugging laws of plugging-selection balls in fine profile control process of layered waterflooding wells

Flow rate (m3/h)

Ball density (kg/m3)

Ball diameter (mm)

Ball-perforation number ratio

1.0–3.0

900–1020

10–14

0.7–1.6

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