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US 5,307,874 AGranted
Method for treating formations with gelatin
AssigneeAtlantic Richfield Company
InventorFrank E. Lowther
Life of this patent
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Abstract
A method for treating a subterranean formation having zones of varying permeablities to alter the flow profile of the formation wherein a specific gelant (i.e. an aqueous solution of ungelled gelatin) is injected into the more permeable zones and is allowed to gel to form a flow-blocking gel therein.
Claims11
A method for treating a subterranean formation having zones of varying permeabilities to alter the flow profile therethrough, said method comprising:
- injecting an aqueous solution of ungelled gelatin into the more permeable zones of said formation, said aqueous solution having a melting temperature above the temperature of said formation and having a temperature above its melting temperature during injection into the formation;
- and
- allowing said aqueous gelatin solution to set to form a flow-blocking gel in said more permeable zones of said formation.
A method for treating a subterranean formation having zones of varying permeabilities to alter the flow profile therethrough, said method comprising:
- preparing an aqueous solution of ungelled gelatin by mixing gelatin and a liquid wherein the concentration of gelatin is sufficient to provide a solution having a melting temperature which is above the temperature of said formation to be treated;
- injecting said aqueous solution of ungelled gelatin through a well into the more permeable zones of aid formation while maintaining the temperature of said aqueous solution above its melting temperature;
- and
- shutting in said well to allow said aqueous gelatin solution to cool to a temperature below its melting temperature to thereby gel to form a flow-blocking gel in said more permeable zones of said formation.
1 more element
Dependencies are inferred from the claim text.