| 摘要 |
In an oil recovery process in which an aqueous solution thickened with a water-soluble anionic polysaccharide polymer (Xanthan gum polymer) is injected into a subterranean reservoir, the stability of the solution viscosity is improved by de-oxygenating the aqueous liquid and then adding a sulfur-containing antioxidant, a readily oxidizable water-soluble alcohol or glycol and the Xanthan gum polymer.
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