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PARMEABILITETSKORREKSJONSFLUID BASERT PAA SULFATFRI PROPIONATSEKVESTRERING AV KROM (III) OG ANVENDELSE AV DETTE I UNDERJORDISKE FORMASJONER.
PARMEABILITETSKORREKSJONSFLUID BASERT PAA SULFATFRI PROPIONATSEKVESTRERING AV KROM (III) OG ANVENDELSE AV DETTE I UNDERJORDISKE FORMASJONER.
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机译:基于铬的无硫酸盐丙酸盐正构化的参量校正流体(Ⅲ)及其在地层中的应用。
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摘要
A sulfate-free clear green solution of chromium(III) propionate is prepared by mixing aqueous propionic acid containing up to 55 weight percent propionic acid with a chromium(VI) oxidant, such as a dichromate or chromate, and a sulfur-containing reductant, such as a bisulfite, which on reacting yields two phases: a lower sulfate- containing phase for discard or recycle and an upper phase solution of sulfate-free clear green propionate-sequestered chromium(III), the latter phase being stabilized with additional acid. The upper phase solution is useful for crosslinking polymeric viscosifiers such as partially hydrolyzed acrylamide-based polymers and the like in permeability contrast corrections in enhanced oil recovery operations.
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