Acoustic logging apparatus and method for anisotropic earth formations
Abstract
The patent discloses a signal processing technique for determining the fast and slow shear wave polarizations, and their orientation, for acoustic waves in an anisotropic earth formation. The signal processing method decomposes composite received waveforms a number of times using a number of different strike angles. The decomposed signals are used to create estimated source signals. The estimated source signals are compared in some way to obtain an objective function. Locations in a plot where the objective function reaches minimum values are indicative of the acoustic velocity of the fast and slow polarizations within the formation.
Term
No projected expiry on record.
- Priority
- Filed
- Published
- Today
1 claim: 1 independent, 0 dependent
- 1FAST SOLID
2 paragraphs, as filed
The present invention describes a signal processing technique for determining the fast and slow shear wave polarizations and their orientation, for acoustic waves in an anisotropic ground formation. The signal processing method decomposes composite received waveforms a number of times using a number of different stray angles. The decomposed signals are used to generate estimated source signals. The estimated source signals are compared in one way or another to provide a lens function. Places in a plotting where the objective function reaches minimum values indicate the acoustic velocity of the rapid and slow polarizations in the formation.
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1 sheet
Sheet 1
8 priority claims, no other members on record
Priority claims8
| Document | Office | Kind | Date |
|---|---|---|---|
| 2515701 | United States of America | A | |
| 2515701 | United States of America | A | |
| 2774901 | United States of America | A | |
| 2774901 | United States of America | A | |
| 025157 | – | – | – |
| 027749 | – | – | – |
| US20010025157 | – | – | – |
| US20010027749 | – | – | – |
1 legal event, as the office reported them to INPADOC
Events
| Event | Code | |
|---|---|---|
| Lapsed by not paying the annual feesLapsedMM1K | MM1K |
Numbers
- Publication, DOCDB
- 20026083
- Publication, EPODOC
- NO20026083L
- Application
- 6083
- Application, DOCDB
- 20026083
- Application, EPODOC
- NO20020006083
Titles2
- Norwegian
- Akustisk loggeapparat og fremgangsmåte for anisotropiske grunnformasjoner
- English
- Acoustic logging apparatus and method for anisotropic ground formations
Classification
- CPC, 1
- G01V1/50
- IPC, 1
- G01V1 50