Claims
- 1. A composition of matter for forming a gel comprising:
- (a) water;
- (b) 0.2 to 5.0 wt. percent of a cross-linkage polymer which is a member selected from the group consisting of polyvinyl alcohol, xanthan biopolymers, sodium aliginate biopolymers, poly(acrylamide-co-acrylamido-2-methyl propane sulfonate), and acrylamide modified polyvinyl alcohol; and
- (c) 0.02 to 50.0 wt. percent of a partially methylated aminoplast resin which cross-links with said polymer thereby forming a gel in the absence of a salt which is acid generating upon the application of heat which gel is of a strength sufficient to close pores in one or more permeable zones of a formation where a formed gel results from a gelation reaction which proceeds under substantially all pH conditions.
- 2. The composition recited in claim 1 wherein said resin is selected from a member of the group consisting of melamine-formaldehyde, urea formaldehyde, ethylene urea formaldehyde, propylene urea formaldehyde, triazone, uran, and glyoxal.
- 3. The composition as recited in claim 1 wherein the ratio of polymer to said resin required for forming said gel is from about 10:1 to about 1:10.
- 4. The composition as recited in claim 1 where said matter comprises a gel which is formed under salinity concentrations encountered in an oil reservoir.
- 5. The composition as recited in claim 1 where said matter comprises a gel of substantial stability which is able to withstand high temperatures encountered in an oil reservoir for at least three months.
- 6. The composition of matter as recited in claim 1 where said composition forms a gel which is unaffected by carbonate, bicarbonate, and sulfate anions encountered in an oil reservoir.
Parent Case Info
This is a divisional of copending application Ser. No. 917,324, filed on Oct. 9, 1986, now U.S. Pat. No. 4834180.
US Referenced Citations (12)
Divisions (1)
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Number |
Date |
Country |
Parent |
917324 |
Oct 1986 |
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