It can temporarily reduce the permeability of the formation or temporarily block high permeability oil layers,mix with water-soluble polymers and inject them into the well. Under the action of pressure difference,it can quickly form a thin and dense oil layer temporary blocking zone.

Appearance:Uniform dry solid particles

Particle size range:1-3mm

Visual density (at room temperature):1.1-

1.3g/cm³

Effective sealing time:>2 hours