CA2185029A1 - A borehole measurement system employing electromagnetic wave propagation - Google Patents
A borehole measurement system employing electromagnetic wave propagationInfo
- Publication number
- CA2185029A1 CA2185029A1 CA002185029A CA2185029A CA2185029A1 CA 2185029 A1 CA2185029 A1 CA 2185029A1 CA 002185029 A CA002185029 A CA 002185029A CA 2185029 A CA2185029 A CA 2185029A CA 2185029 A1 CA2185029 A1 CA 2185029A1
- Authority
- CA
- Canada
- Prior art keywords
- borehole
- drilling
- interest
- determination
- electromagnetic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
This invention is directed toward the determination of geophysical parameters of earth formations penetrated by a borehole. The invention is more particularly directed toward the determination of geophysical properties from measures of electromagnetic properties of earth formations in the vicinity of a borehole either during the drilling of the borehole or subsequent to the drilling of the borehole.
The downhole instrument component comprises one or more transmitters and a plurality of receivers axially spaced along a downhole subassembly, and is preferably conveyed along the borehole by means of a drill string. Improved electronic circuitry and data processing methods are used to eliminate the adverse effects of impedance changes and mutual coupling of the receiving antennas. Parallel data processing methods are used to minimize propagation of systematic errors in computed parameters of interest. The quality of the measured and computed parameters of interest are also monitored.
The downhole instrument component comprises one or more transmitters and a plurality of receivers axially spaced along a downhole subassembly, and is preferably conveyed along the borehole by means of a drill string. Improved electronic circuitry and data processing methods are used to eliminate the adverse effects of impedance changes and mutual coupling of the receiving antennas. Parallel data processing methods are used to minimize propagation of systematic errors in computed parameters of interest. The quality of the measured and computed parameters of interest are also monitored.
Applications Claiming Priority (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/212,194 | 1994-03-11 | ||
US08/212,194 US5469062A (en) | 1994-03-11 | 1994-03-11 | Multiple depths and frequencies for simultaneous inversion of electromagnetic borehole measurements |
US21226994A | 1994-03-14 | 1994-03-14 | |
US21225794A | 1994-03-14 | 1994-03-14 | |
US21221294A | 1994-03-14 | 1994-03-14 | |
US08/212,269 | 1994-03-14 | ||
US08/214,343 US5574374A (en) | 1991-04-29 | 1994-03-14 | Method and apparatus for interrogating a borehole and surrounding formation utilizing digitally controlled oscillators |
US08/214,916 US5811972A (en) | 1991-04-29 | 1994-03-14 | Method and apparatus for determining influence of mutual magnetic coupling in electromagnetic propagation tools |
US08/212,012 | 1994-03-14 | ||
US08/214,343 | 1994-03-14 | ||
US08/212,257 | 1994-03-14 | ||
US08/214,916 | 1994-03-14 | ||
PCT/US1995/002814 WO1995024663A1 (en) | 1994-03-11 | 1995-03-07 | A borehole measurement system employing electromagnetic wave propagation |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2185029A1 true CA2185029A1 (en) | 1995-09-14 |
CA2185029C CA2185029C (en) | 2003-08-26 |
Family
ID=27559043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002185029A Expired - Lifetime CA2185029C (en) | 1994-03-11 | 1995-03-07 | A borehole measurement system employing electromagnetic wave propagation |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU1981695A (en) |
CA (1) | CA2185029C (en) |
NO (1) | NO315099B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110208008A (en) * | 2019-06-24 | 2019-09-06 | 哈尔滨东安汽车发动机制造有限公司 | A kind of manual transmission vehicle shift quality assessment evaluation experimental devices and methods therefor |
-
1995
- 1995-03-07 AU AU19816/95A patent/AU1981695A/en not_active Abandoned
- 1995-03-07 CA CA002185029A patent/CA2185029C/en not_active Expired - Lifetime
-
1996
- 1996-09-10 NO NO19963793A patent/NO315099B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO963793L (en) | 1996-11-08 |
CA2185029C (en) | 2003-08-26 |
NO963793D0 (en) | 1996-09-10 |
AU1981695A (en) | 1995-09-25 |
NO315099B1 (en) | 2003-07-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150309 |