Aqueous polysaccharide-containing fluid having superior filterab

Details Aqueous polysaccharide-containing fluid having superior filterab Aqueous polysaccharide-containing fluid having superior filterab

1978-05-12

1980-11-11

Padgett, Benjamin R.

Wells

Processes

Distinct, separate injection and producing wells

166246, 252 855D, 252 855R, E21B 4316

Patent

active

042327393

ABSTRACT:
The injectability, filterability and stability, especially resistance to precipitation on contact with water containing relatively high content of boron salts such as borates, of an aqueous polysaccharide-containing fluid for use in viscous oil recovery operations is improved by prehydrating the polysaccharide in fresh water of low boron content followed by shearing for a period of time sufficient to provide desirable filtration properties following by dilution with field brine followed by a second shearing step prior to injecting the aqueous fluid into the formation.

REFERENCES:
patent: 3096284 (1963-07-01), Slate
patent: 3373810 (1968-03-01), Williams
patent: 3625889 (1971-12-01), Brunscum
patent: 3908760 (1975-09-01), Clampitt
patent: 4104193 (1978-08-01), Carter et al.

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