Produced water treatment scale inhibitors

Near-well treatments, in which chemicals are injected into producing and sometimes injector wells, where they are intended to react with the reservoir rock. Well stimulation techniques such as acidization, for example, are intended to increase the formation s permeability. Alternatively, producing wells may receive squeeze treatments in which a mineral scale inhibitor is injected into the formation. In this case, the treatment is designed so that the inhibitor sorbs onto mineral surfaces, where it can gradually desorb into the formation water during production. 

Vinylphosphonic acid is produced in Germany and used, initially by Hoechst, later by others to manufacture a hydrophilic poly(vinylphosphonic acid) prepared by free-radical polymerization in a solvent (70,71). Poly(vinylphosphonic acid) is mainly used for the treatment of aluminum photolithography plates before application of the photosensitive layer (72,73). The coating improves the developing and printing characteristics of the plate. Dental cement applications of cross-linked poly(vinylphosphonic acid) have also been studied (74). Vinylphosphonic acid copolymers with vinylsulfonic acid have been patented as scale inhibitors for water treatment (75). 

A type of waterside maintenance chemical treatment. Any of a very wide range of chemicals that prevent or reduce tendencies of deposition, fouling, scaling, corrosion, or other unwanted phenomena to occur in a water system. Typically for smaller boiler plants, individual inhibitors are blended together to produce various multifunctional formulations specific for particular water chemistry and/or operating conditions. Larger boiler plants tend to use individual active component inhibitors. 

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