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A common misperception is that all the polymers used in well stimulation will lead to formation damage. There is countless data showing that guar and guar derivatives degrade to insoluble and permeability blocking residue. As the industry shifts almost exclusively to using polymers based on polyacrylamide and related copolymers, the concern of formation damage returns, especially when concentrations are elevated substantially to build viscosity with HVFR’s. Fortunately, lab testing shows that some of these polymers are notably cleaner than guar polymers and can yield closer to 100% regained permeability (Sometimes even higher than 100%), especially with the use of breakers.
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