US3256480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of detecting geologically anomalous bodies lateral to a well bore by comparing electrical resistivity measurements made using short-spaced and long-spaced electrode systems
Assignee: Chevron USA Inc
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Filing: 1965-03-29
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Granted: 1966-06-14
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Richard J Runge
- 👤 Albert E Worthington
- 👤 Sulhi H Yungul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:42
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
THE METHOD OF EXPLORING FOR SALT DOMES OR OTHER HIGHLY RESISTIVE BODIES LATERALLY FROM A WELL BORE, USING AT LEAST ONE CURRENT ELECTRODE IN SAID WELL BORE TO PASS CURRENT INTO THE FORMATIONS SURROUNDING THE WELL BORE, AND DETECTING POTENTIALS AT A PLURALITY OF POTENTIAL ELECTRODES IN SAID WELL BORE SPACED APART FROM SAID CURRENT ELECTRODE WHICH COMPRISES: (A) MEASURISNG THE RESISTIVITIES OF THE FORMATIONS SURROUNDING THE WELL BORE BY TRAVERSING AT LEAST ONE OF SAID POTENTIAL ELECTRODES AT A SHORT SPACING RELATIVE TO SAID CURRENT ELECTRODE OVER A GIVEN DEPTH INTERVAL IN SAID WELL BORE, (B) MEASURING OVER AT LEAST THE SAME DEPTH INTERVAL THE RESISTIVITY OF THE FORMATIONS SURROUNDING THE WELL BORE BY USING AT LEAST ONE OF SAID POTENTIAL ELECTRODES AT A RELATIVELY LONG SPACING RELATIVE TO SAID CURRENT ELECTRODE AND SPANNING AT LEAST SAID DEPTH INTERVAL, (C) AVERAGING THE RESISTIVITIES MEASURED WITH SAID AT LEAST ONE SHORT-SAPCED POTENTIAL ELECTRODE, THE AVERAGE BEING TAKEN BY SUMMING THE INDIVIDUAL RESISTIVITIES AT A PLURALITY OF LOCATIONS OVER SAID DEPTH INTERVAL IN SAID WELL BORE SPANNED BY SAID LONG-SPACED POTENTIAL ELECTRODE AND DIVIDING THE SUM OF SAID RESISTIVITIES BY THE NUMBER OF SAID LOCATIONS TO INDICATE THE RESISTIVITY VALUE THAT WOULD BE EXPECTED TO BE MEASURED USING SAID AT LEAST ONE LONG-SPACED POTENTIAL ELECTRODE, AND
Claim 2
Independent Claim
215 words
THE METHOD OF EXPLORING FOR SALT DOMES OR OTHER HIGHLY RESISTIVE BODIES LATERALLY FROM A WELL BORE, USING AT LEAST ONE CURRENT ELECTRODE IN SAID WELL BORE TO PASS CURRENT INTO THE FORMATIONS SURROUNDING THE WELL BORE, AND DETECTING POTENTIALS AT A PLURALITY OF POTENTIAL ELECTRODES IN SAID WELL BORE SPACED APART FROM SAID CURRENT ELECTRODE WHICH COMPRISES: (A) MEASURISNG THE RESISTIVITIES OF THE FORMATIONS SURROUNDING THE WELL BORE BY TRAVERSING AT LEAST ONE OF SAID POTENTIAL ELECTRODES AT A SHORT SPACING RELATIVE TO SAID CURRENT ELECTRODE OVER A GIVEN DEPTH INTERVAL IN SAID WELL BORE, (B) MEASURING OVER AT LEAST THE SAME DEPTH INTERVAL THE RESISTIVITY OF THE FORMATIONS SURROUNDING THE WELL BORE BY USING AT LEAST ONE OF SAID POTENTIAL ELECTRODES AT A RELATIVELY LONG SPACING RELATIVE TO SAID CURRENT ELECTRODE AND SPANNING AT LEAST SAID DEPTH INTERVAL, (C) AVERAGING THE RESISTIVITIES MEASURED WITH SAID AT LEAST ONE SHORT-SAPCED POTENTIAL ELECTRODE, THE AVERAGE BEING TAKEN BY SUMMING THE INDIVIDUAL RESISTIVITIES AT A PLURALITY OF LOCATIONS OVER SAID DEPTH INTERVAL IN SAID WELL BORE SPANNED BY SAID LONG-SPACED POTENTIAL ELECTRODE AND DIVIDING THE SUM OF SAID RESISTIVITIES BY THE NUMBER OF SAID LOCATIONS TO INDICATE THE RESISTIVITY VALUE THAT WOULD BE EXPECTED TO BE MEASURED USING SAID AT LEAST ONE LONG-SPACED POTENTIAL ELECTRODE, AND
References Cited (Backward Citations)
US2972101A
Cited
US3076138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |