| 摘要 |
Waterflood oil recovery process employing a Xanthomonas polysaccharide as a thickening agent in which the aqueous polysaccharide solution contains a C3-C5 aliphatic alcohol. The aliphatic alcohol functions to stabilize the polysaccharide against thermal degradation in reservoirs having temperatures in excess of 60 DEG C. The polysaccharide solution may also contain an alkali metal carbonate which functions with the alcohol to impart further stability to the Xanthomonas polysaccharide solution.
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