Wells – Processes – Distinct – separate injection and producing wells
Patent
1985-05-30
1987-01-27
Michl, Paul R.
Wells
Processes
Distinct, separate injection and producing wells
523130, 5263076, 252 8514, 252 8512, 252 8554, E21B 4316
Patent
active
046388656
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.3 are independently hydrogen or alkyl groups of 1 to about 3 carbon atoms; R.sup.2 is hydrogen or an alkyl group of 2 to about 3 carbon atoms, and R.sup.4 is hydrogen or an alkyl group of 1 to about 3 carbon atoms, with the proviso that R.sup.2 is not the same as R.sup.4 and either R.sup.2 or R.sup.4 is hydrogen; m is a number sufficient to provide the acid or salt portion of said polymer at a level of from about 10% 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 90% 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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Pusher Oil Recovery Polymers, Pusher 500 Polymers, The Dow Chemical Company, 1980, form No. 192-786-80.
Pusher Oil Recovery Polymers, Pusher 700 Polymers, The Dow Chemical Company, 1980, form No. 192-787-80.
Pusher Oil Recovery Polymers, Pusher 1000, The Dow Chemical Company, form No. 173-926-75.
Ball Lawrence E.
Griffin William M.
Nemecek Amy L.
Wallace Kathleen M.
Evans Larry W.
Heidrich William A.
Michl Paul R.
The Standard Oil Company
Untener David J.
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