Crosslinked polymer solutions and methods of use
A well treatment composition is formed from an aqueous crosslinkable hydrated polymer solution. Combined with the polymer solution is a solid boric acid or borate crosslinking agent and a solid metal oxide or metal hydroxide pH buffering agent that has limited solubility (less than 100 kg/m3 at 20°...
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| Zusammenfassung: | A well treatment composition is formed from an aqueous crosslinkable hydrated polymer solution. Combined with the polymer solution is a solid boric acid or borate crosslinking agent and a solid metal oxide or metal hydroxide pH buffering agent that has limited solubility (less than 100 kg/m3 at 20° C.) within the polymer solution that provides the solution with a pH of from about 8 to about 11. The composition may be introduced into a subterranean formation through a wellbore that penetrates the formation. The composition may provide at least one of shortened shear recovery time and an increase in the thermal stability of the aqueous polymer solution. |
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