Wells – Processes – Distinct – separate injection and producing wells
Patent
1985-05-30
1987-03-31
Guynn, Herbert B.
Wells
Processes
Distinct, separate injection and producing wells
252 8551, 526262, E21B 4322
Patent
active
046535845
ABSTRACT:
A polymer is disclosed which is represented by the formula ##STR1## wherein: Y is hydrogen, ammonium, an alkali metal or an alkaline earth metal; R.sup.1 and R.sup.2 are independently hydrogen, hydroxyl, amino, nitro, sulfo, phospho, carboxy, carboxyamido groups or hydrocarbon groups of 1 to about 20 carbon atoms; R.sup.3 is hydrogen or a hydrocarbon group of from 1 to about 12 carbon atoms; R.sup.4 and R.sup.5 are independently hydrogen or alkyl groups of 1 to about 3 carbon atoms; m is a number sufficient to provide the acid or salt portion of said polymer at a level of from zero to about 90% by weight of the total weight of said polymer; n is a number sufficient to provide the amide portion of said polymer at a level of from about 10% to about 99.5% by weight of the total weight of said polymer; p is a number sufficient to provide the maleimide portion of said polymer at a level of at least about 0.2% by weight of the total weight of said polymer; and x is a number sufficient to provide said polymer with a molecular weight of at least about 100,000. A method for recovering oil from a subterranean formation comprising injecting into said formation an aqueous composition comprising a thickening amount of the foregoing polymer is also disclosed.
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Antloga Kathleen M.
Ball Lawrence E.
Griffin William M.
Nemecek Amy L.
Evans L. W.
Guynn Herbert B.
Heidrich W. A.
The Standard Oil Company
Untener D. J.
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