US3235026A
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Method for determining formation pressures
Assignee: Shell USA Inc
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Filing: 1961-10-12
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Granted: 1966-02-15
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Hottman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:03
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06; G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A METHOD FOR DETERMING THE PRESSURE TO BE EXPECTED IN A RESERVOIR, SAID METHOD COMPRISING: MEASURING THE RATE OF CHANGE WITH DEPTH OF THE ACOUSTICAL VELOCITY IN A VERTICAL SEQUENCE OF NORMALLY COMPACTED SHALES; MEASURING THE ACOUSTICAL VELOCITY IN AN UNDER-COMPACTED SHALE BELOW SAID SEQUENCE AND UTILIZING THE DIFFERENCE BETWEEN THE MEASURED VALUE AND THE VALUE THAT WOULD BE EXHIBITED BY A NORMALLY COMPACTED SHALE AT THE DEPTH OF THE MEASUREMENT TO PREDICT THE PRESSURE IN A RESERVOIR IN THE UNDERCOMPACTED SHALE AT THE END DEPTH.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |