IE782574L - Determining the velocity of acoustic waves in earth¹formations - Google Patents
Determining the velocity of acoustic waves in earth¹formationsInfo
- Publication number
- IE782574L IE782574L IE782574A IE257478A IE782574L IE 782574 L IE782574 L IE 782574L IE 782574 A IE782574 A IE 782574A IE 257478 A IE257478 A IE 257478A IE 782574 L IE782574 L IE 782574L
- Authority
- IE
- Ireland
- Prior art keywords
- velocity
- receivers
- correlation
- signals
- provisional
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
- G01V1/48—Processing data
- G01V1/50—Analysing data
Abstract
To determine the velocity of acoustic wave energy propagating in formations surrounding a borehole (14), a transmitter (16) periodically transmits acoustic wave energy into the surrounding formations. This energy is received at a plurality of spaced receivers (18.1-18.4). A first portion of the signal from the receiver 18.1 is then correlated with respective first portions of the signals from the other receivers (18.2-18.4) the time reference for the correlation of each of the first portions of the signals from the other receivers (18.2-18.4) being selected, relative to the time reference of the signal from the receiver 18.1, in accordance with the spacing of the receivers (18.1-18.4) and a first estimated velocity. The correlation is repeated for four more estimated velocities, and a velocity value which yields the best correlation is selected by interpolation as a first provisional velocity. The correlation for several assumed velocities and interpolation is then performed on second portions of the signals from the receivers (18.1-18.4) to obtain a second provisional velocity. An output velocity is then determined as a function of the first and second (and possibly other similarly-generated) provisional velocities. The velocity of the compressional component and/or the shear component of the acoustic wave energy can be obtained. <IMAGE>
[GB2012422A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86919378A | 1978-01-13 | 1978-01-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE782574L true IE782574L (en) | 1979-07-13 |
| IE48252B1 IE48252B1 (en) | 1984-11-14 |
Family
ID=25353097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE2574/78A IE48252B1 (en) | 1978-01-13 | 1978-12-29 | Apparatus and method for determining velocity of acoustic waves in earth formations |
Country Status (11)
| Country | Link |
|---|---|
| BR (1) | BR7900220A (en) |
| CA (1) | CA1153815A (en) |
| EG (1) | EG13567A (en) |
| FR (1) | FR2414734A1 (en) |
| GB (1) | GB2012422B (en) |
| IE (1) | IE48252B1 (en) |
| IT (1) | IT1110386B (en) |
| MY (1) | MY8500188A (en) |
| NO (1) | NO153622C (en) |
| OA (1) | OA06148A (en) |
| TR (1) | TR20740A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981000456A1 (en) * | 1979-07-30 | 1981-02-19 | Dorian Ind Pty Ltd | Method and device for measuring distances |
| FR2469720B1 (en) * | 1979-11-08 | 1987-01-09 | Gaudiani Pierre | SYSTEM IMPROVING ACOUSTIC MEASUREMENT METHODS |
| US4432077A (en) * | 1981-01-02 | 1984-02-14 | Mobil Oil Corporation | Determination of formation permeability from a long-spaced acoustic log |
| US4933911A (en) * | 1989-09-01 | 1990-06-12 | Amoco Corporation | Method for determining seismic velocities |
| GB2275337B (en) * | 1993-02-17 | 1997-01-22 | Csm Associates Limited | Improvements in or relating to seismic detectors |
| KR950013123B1 (en) * | 1993-06-18 | 1995-10-25 | 엘지전자주식회사 | Chaos processor |
| KR950013124B1 (en) * | 1993-06-19 | 1995-10-25 | 엘지전자주식회사 | Chaos feedback system |
| US5541890A (en) * | 1995-05-10 | 1996-07-30 | Western Atlas International, Inc. | Method for predictive signal processing for wireline acoustic array logging tools |
| CN104594878B (en) * | 2014-11-20 | 2017-05-10 | 中国石油大学(华东) | Double-source flyback through-casing acoustic logging method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3177467A (en) * | 1961-02-08 | 1965-04-06 | Dresser Ind | Acoustic velocity logging system and computer |
| US3696331A (en) * | 1970-07-22 | 1972-10-03 | Mobil Oil Corp | Automated process for determining subsurface velocities from seismograms |
-
1978
- 1978-12-29 IE IE2574/78A patent/IE48252B1/en unknown
-
1979
- 1979-01-02 NO NO790007A patent/NO153622C/en unknown
- 1979-01-04 CA CA000319075A patent/CA1153815A/en not_active Expired
- 1979-01-10 GB GB79954A patent/GB2012422B/en not_active Expired
- 1979-01-10 IT IT19192/79A patent/IT1110386B/en active
- 1979-01-11 TR TR20740A patent/TR20740A/en unknown
- 1979-01-12 BR BR7900220A patent/BR7900220A/en unknown
- 1979-01-12 FR FR7900699A patent/FR2414734A1/en active Granted
- 1979-01-13 EG EG23/79A patent/EG13567A/en active
- 1979-01-13 OA OA56707A patent/OA06148A/en unknown
-
1985
- 1985-12-30 MY MY188/85A patent/MY8500188A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TR20740A (en) | 1982-06-24 |
| NO790007L (en) | 1979-07-16 |
| FR2414734A1 (en) | 1979-08-10 |
| GB2012422A (en) | 1979-07-25 |
| EG13567A (en) | 1982-03-31 |
| MY8500188A (en) | 1985-12-31 |
| BR7900220A (en) | 1979-08-14 |
| CA1153815A (en) | 1983-09-13 |
| IT1110386B (en) | 1985-12-23 |
| IT7919192A0 (en) | 1979-01-10 |
| NO153622C (en) | 1986-05-21 |
| IE48252B1 (en) | 1984-11-14 |
| FR2414734B1 (en) | 1984-08-03 |
| OA06148A (en) | 1981-06-30 |
| GB2012422B (en) | 1982-08-18 |
| NO153622B (en) | 1986-01-13 |
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