US3332483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining the vertical variation of permeability in a subsurface formation
Assignee: Gulf Research and Development Co
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Filing: 1964-09-02
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Granted: 1967-07-25
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Expires: 1984-09-02
Abstract
No abstract record available.
Inventors
- 👤 Malcolm R J Wyllie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:30
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; E21B47/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD OF DETERMINING IN SITU THE VERTICAL VARIATION OF PERMEABILITY IN A SUBSURFACE FORMATION PENETRATED BY A BOREHOLE WHICH COMPRISES INSTALLING AND SEALING CASING AGAINST THE FORMATION IN THE BOREHOLE THROUGHOUT THE DEPTH INTERVAL OF INTEREST, PERFORATING SAID CASING AND SEAL TO ESTABLISH COMMUNICATION FROM INSIDE SAID CASING TO THE FORMATION AT THE TOP OF THE DEPTH INTERVAL OF INTEREST, INJECTING INTO THE TOP OF THE FORMATION VIA SAID PERFORATIONS LIQUID THAT IS MISCIBLE WITH THE FORMATION LIQUID WITH RESPECT TO WHICH FORMATION PERMEABILITY IS TO BE DETERMINED AND THAT HAS A DENSITY EXCEEDING THAT OF SAID FORMATION LIQUID, SAID INJECTED LIQUID BEING CHARACTERIZED BY BEING DETECTABLE THROUGH THE CASING AND ITS SEAL, LOGGING THE DEPTH INTERVAL OF INTEREST BY MEANS OF A LOG ADAPTED TO DETECT SAID HEAVY LIQUID IN THE FORMATION, AND REPEATING SAID LOG AT SUBSEQUENT KNOWN TIME INTERVALS THEREBY TO MONITOR DESCENT OF SAID HEAVY LIQUID.
Claim 2
Independent Claim
151 words
A METHOD OF DETERMINING IN SITU THE VERTICAL VARIATION OF PERMEABILITY IN A SUBSURFACE FORMATION PENETRATED BY A BOREHOLE WHICH COMPRISES INSTALLING AND SEALING CASING AGAINST THE FORMATION IN THE BOREHOLE THROUGHOUT THE DEPTH INTERVAL OF INTEREST, PERFORATING SAID CASING AND SEAL TO ESTABLISH COMMUNICATION FROM INSIDE SAID CASING TO THE FORMATION AT THE TOP OF THE DEPTH INTERVAL OF INTEREST, INJECTING INTO THE TOP OF THE FORMATION VIA SAID PERFORATIONS LIQUID THAT IS MISCIBLE WITH THE FORMATION LIQUID WITH RESPECT TO WHICH FORMATION PERMEABILITY IS TO BE DETERMINED AND THAT HAS A DENSITY EXCEEDING THAT OF SAID FORMATION LIQUID, SAID INJECTED LIQUID BEING CHARACTERIZED BY BEING DETECTABLE THROUGH THE CASING AND ITS SEAL, LOGGING THE DEPTH INTERVAL OF INTEREST BY MEANS OF A LOG ADAPTED TO DETECT SAID HEAVY LIQUID IN THE FORMATION, AND REPEATING SAID LOG AT SUBSEQUENT KNOWN TIME INTERVALS THEREBY TO MONITOR DESCENT OF SAID HEAVY LIQUID.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |