Wells – Processes – Distinct – separate injection and producing wells
Patent
1985-09-03
1987-04-28
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166274, 166303, E21B 4324
Patent
active
046606416
ABSTRACT:
Steam injected into a subterranean formation comprises a liquid phase and a vapor phase. Oil displacement by the liquid phase is not as efficient as the oil displacement in the portion of the formation contacted by the vapor phase. The effectiveness of the oil recovery process in the portion of the formation being contacted by the liquid phase is increased by contacting that portion of the formation with an aqueous solution containing from 0.005 to 2.0 percent by weight of an alkalinity agent, preferably sodium hydroxide, and from 0.01 to 5.0 percent by weight of a buffering agent, preferably sodium carbonate. The mixture of sodium hydroxide and sodium carbonate may be co-mixed with the steam introduced into the formation, or may be introduced as a separate liquid containing both the sodium carbonate and sodium hydroxide, or separate slugs containing sodium carbonate and sodium hydroxide may be injected.
REFERENCES:
patent: 3279538 (1966-10-01), Doscher
patent: 3880237 (1975-04-01), Snavely, Jr. et al.
patent: 3913671 (1975-10-01), Redford et al.
patent: 3924683 (1975-12-01), George et al.
patent: 3977470 (1976-08-01), Chang
patent: 4068716 (1978-01-01), Allen
patent: 4487262 (1984-12-01), Venkatesan et al.
patent: 4523642 (1985-06-01), Venkatesan
Park Jack H.
Priem Kenneth R.
Suchfield George A.
Texaco Inc.
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