Patent US3288213A successfully refreshed from Google Patents.
US3288213A
Expired / Lapsed
US
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Surfactant-water flooding process
Assignee: Cities Service Oil Co
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Filing: 1964-05-28
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Granted: 1966-11-29
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jack A King
- 👤 John W Mcghee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:01
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD FOR RECOVERING OIL FROM SUBTERRANEAN RESERVOIRS BY SURFACTANT WATERFLOOD INJECTION IN WHICH THE ADDITIONAL OIL RECOVERABLE BY ANY FIVEN SURFACTANT SYSTEM IS MAXIMIZED COMPRISING: (A) INJECTING A SURFACTANT SLUG NOT EXCEEDING ABOUT 10% OF THE FORMATION PORE VOLUME INTO THE RESERVIOR, SAID SLUG CONTAINING NOT MORE THAN ABOUT 10% BY WEIGHT SURFACTANTS, THE SURFACTANTS BEING BLENDED IN SUCH PROPORTIONS THAT THE HYDROPHILIC-LIPOPHILIC BALANCE OF THE SURFACTANT SYSTEM IS APPROXIMATELY THE SAME AS THAT ASSOCIATED WITH THE CRUDE OIL-INJECTION WATER SYSTEM; AND (D) DRIVING THE SURFACTANT SLUG THROUGH THE RESERVOIR BY MEANS OF A WATER FLOOD, WHEREBY, A PORTION OF THE RESIDUAL OIL RETAINED IN THE RESERVIOR AFTER PRIMARY PRODUCTION WILL BE RECOVERED, SAID PORTION BEING GREATER THAN THAT RECOVERABLE BY BLENDING THE DESIRED SURFACTANTS IN ANY OTHER PROPORTIONS.
Claim 2
Independent Claim
130 words
A METHOD FOR RECOVERING OIL FROM SUBTERRANEAN RESERVOIRS BY SURFACTANT WATERFLOOD INJECTION IN WHICH THE ADDITIONAL OIL RECOVERABLE BY ANY FIVEN SURFACTANT SYSTEM IS MAXIMIZED COMPRISING: (A) INJECTING A SURFACTANT SLUG NOT EXCEEDING ABOUT 10% OF THE FORMATION PORE VOLUME INTO THE RESERVIOR, SAID SLUG CONTAINING NOT MORE THAN ABOUT 10% BY WEIGHT SURFACTANTS, THE SURFACTANTS BEING BLENDED IN SUCH PROPORTIONS THAT THE HYDROPHILIC-LIPOPHILIC BALANCE OF THE SURFACTANT SYSTEM IS APPROXIMATELY THE SAME AS THAT ASSOCIATED WITH THE CRUDE OIL-INJECTION WATER SYSTEM; AND (D) DRIVING THE SURFACTANT SLUG THROUGH THE RESERVOIR BY MEANS OF A WATER FLOOD, WHEREBY, A PORTION OF THE RESIDUAL OIL RETAINED IN THE RESERVIOR AFTER PRIMARY PRODUCTION WILL BE RECOVERED, SAID PORTION BEING GREATER THAN THAT RECOVERABLE BY BLENDING THE DESIRED SURFACTANTS IN ANY OTHER PROPORTIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |