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KD-44 Specification of temporary plugging additive

The temporary plugging additive (TPA) is a dispersed system of oil-soluble organics for the diverting agent used in unclogging well of medium-to-high water content. The addition of the unclogging agent (acid) to the iol layer prefaced by mixing with TPA can facilitate the later entering the highly permeable layer (HPL), forming a clot and allowing the unclogging agent entering the lowly permeable layer (LPL), so as to selectively combat the clogging in the layer of low permeability and high oil saturation.
I、Mechanism 
　 TPA, the major component of which is water-insoluble, occupies HPL and forms bridging clog in the channels the when entering a stratum. As the TPA reached the ambient temperature, softening happens to the TPA in the water payer, thus attaching to the channel wall to form the clog, while the TPA in LPL is dissolved in the oil layer without obstruction.。
II、Technical indicators

III、Usage and Dosage 
1、formula and preparation of the on-site working solution
preparation of the on-site working solution of TPA with <40℃ water. Formula: TPA : water = 1:4
2、Dosage
Dosage of the solution: perforation interval / m ≥0.5m3 (usually 0.5m3 -1.0m3)IV Notice for packaging and Storage
1、Packaged in 50 or 200 kg plastic barrel.
2、Careful handling is required in transportation; storage shall be at cool, dry and ventilated place.
3、Maximum storage for a year.