US4424863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery by waterflooding
Assignee: Mobil Oil AS
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Filing: 1981-10-06
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Granted: 1984-01-10
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Expires: 2001-10-06
Abstract
Abstract This invention provides a method for the recovery of oil from a subterranean oil reservoir penetrated by spaced apart injection system and production system in which an aqueous fluid is injected into the reservoir via the injection system to displace oil to the production system, the improvement comprising dissolving molecular oxygen in the aqueous fluid being injected into the water under pressure sufficient to maintain liquid phase oxidation at reservoir conditions.
Inventors
- 👤 James R. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:56
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/845; E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
In a method for the recovery of oil from a subterranean oil reservoir penetrated by spaced apart injection system and production system in which an aqueous liquid is injected into the reservoir via the injection system to displace oil to the production system, the improvement comprising dissolving molecular oxygen in the aqueous liquid being injected into the reservoir under pressure sufficient to maintain liquid phase oxidation at reservoir conditions, said pressure being sufficient to prevent said injected liquid from being converted to steam.
Claim 2
Dependent Claim
83 words
In a method for the recovery of oil from a subterranean oil reservoir penetrated by spaced apart injection system and production system in which an aqueous liquid is injected into the reservoir via the injection system to displace oil to the production system, the improvement comprising dissolving molecular oxygen in the aqueous liquid being injected into the reservoir under pressure sufficient to maintain liquid phase oxidation at reservoir conditions, said pressure being sufficient to prevent said injected liquid from being converted to steam.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |