NO343015B1 - Method for denoising seismic data from a seafloor array - Google Patents
Method for denoising seismic data from a seafloor array Download PDFInfo
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- NO343015B1 NO343015B1 NO20170488A NO20170488A NO343015B1 NO 343015 B1 NO343015 B1 NO 343015B1 NO 20170488 A NO20170488 A NO 20170488A NO 20170488 A NO20170488 A NO 20170488A NO 343015 B1 NO343015 B1 NO 343015B1
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- Norway
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- data
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- hydrophone
- seismic
- motion data
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 230000001427 coherent effect Effects 0.000 claims abstract description 14
- 230000001131 transforming effect Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
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- 229910052704 radon Inorganic materials 0.000 description 4
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000013507 mapping Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/32—Transforming one recording into another or one representation into another
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/20—Trace signal pre-filtering to select, remove or transform specific events or signal components, i.e. trace-in/trace-out
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/30—Noise handling
- G01V2210/32—Noise reduction
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A method for denoising seismic data from a seafloor array with several hydrophones and several seismic receivers, each seismic receiver comprising three mutually orthogonal motion sensors. The method comprises the steps of: transforming (110, 115) recorded motion data (111) from the seismic receivers and recorded hydrophone data (116) from the hydrophones into a transform domain where acoustic sources are separated; and matching (120) transformed hydrophone data (117) to transformed motion data (112), thereby obtaining matched hydrophone data (121). The separated sources enable more reliable automatic filtering and matching than similar processing in the TX domain. The method further comprises the steps of: performing an inverse transform (130) of the matched hydrophone data (121), thereby obtaining matched P-wave data (131) in the TX domain; and subtracting the matched P-wave data (131) from the recorded motion data (111), thereby obtaining enhanced motion data (141) in the TX domain. Coherent noise transferred through the seafloor can be removed in a later step.
Claims (9)
1. Fremgangsmåte for å fjerne støy fra seismiske data fra flere hydrofoner og flere seismiske mottakere omfattende å transformere (110, 115) registrerte bevegelsesdata (111) fra de seismiske mottakerne og registrerte hydrofondata (116) fra hydrofonene, karakterisert ved at fremgangsmåten er utført i sanntid og i et TX-domene, seismiske data omfattende S-bølgesignaler, P-bølgesignaler og vannbåren støy, hver seismisk mottaker omfattende tre gjensidig ortogonale bevegelsessensorer,
fremgangsmåten videre omfattende trinnene med:
- at registrerte bevegelsesdata (111) og registrerte hydrofondata (116) er transformert til et transformasjonsdomene som involverer en τ-p-transformasjon hvor akustiske kilder er separert; og
- samsvare (120) transformerte hydrofondata (117) ved å involvere et filter slik som et Wiener-filter med transformerte bevegelsesdata (112), for derved å oppnå samsvarende hydrofondata (121) omfattende to separate akustiske kilder.
2. Fremgangsmåte som angitt i krav 1, videre omfattende trinnene med:
- å utføre en invers transformasjon (130) av samsvarende hydrofondata (121), for derved å oppnå samsvarende P-bølgedata (131) i TX-domenet; og
- subtrahere samsvarende P-bølgedata (131) fra registrerte bevegelsesdata (111), for derved å oppnå forbedrede bevegelsesdata (141) i TX-domenet.
3. Fremgangsmåte som angitt i krav 1, videre omfattende trinnet med:
- å subtrahere samsvarende hydrofondata (121) fra transformerte bevegelsesdata (112) for å oppnå forbedrede bevegelsesdata i transformasjonsdomenet.
4. Fremgangsmåte som angitt i krav 3, videre omfattende trinnet med:
- å utføre en invers transformasjon (130) på forbedrede bevegelsesdata i transformasjonsdomenet for å oppnå forbedrede bevegelsesdata (141) i TX-domenet.
5. Fremgangsmåte som angitt i et av de foregående kravene, hvor å samsvare innbefatter et Wiener-filter.
6. Fremgangsmåte som angitt i et av de foregående kravene, videre omfattende å filtrere og/eller dempe i TX-domenet.
7. Fremgangsmåte som angitt i et av de foregående kravene, videre omfattende å filtrere og/eller dempe i transformasjonsdomenet.
8. Fremgangsmåte som angitt i et av kravene 2-7, videre omfattende trinnene med å identifisere og fjerne koherent støy i forbedrede bevegelsesdata (141) ved hjelp av autokorrelasjon.
9. Fremgangsmåte som angitt i et av kravene 2-8, videre omfattende trinn for å oppnå forbedrede bevegelsesdata (141) i TX-domenet innen et sekund fra slutten av registreringen av bevegelsesdata (111) og hydrofondata (116).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20170488A NO343015B1 (en) | 2017-03-26 | 2017-03-26 | Method for denoising seismic data from a seafloor array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20170488A NO343015B1 (en) | 2017-03-26 | 2017-03-26 | Method for denoising seismic data from a seafloor array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20170488A1 NO20170488A1 (en) | 2018-09-27 |
| NO343015B1 true NO343015B1 (en) | 2018-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20170488A NO343015B1 (en) | 2017-03-26 | 2017-03-26 | Method for denoising seismic data from a seafloor array |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO343015B1 (no) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110213556A1 (en) * | 2010-03-01 | 2011-09-01 | Bp Corporation North America Inc. | System and method for local attribute matching in seismic processing |
| US20130021873A1 (en) * | 2011-07-18 | 2013-01-24 | CGGVeritas Services (U.S.) Inc. | Method and device for wave fields separation in seismic data |
| US20130107664A1 (en) * | 2011-10-26 | 2013-05-02 | Nicolas Goujon | Processing multi-component seismic data |
| US20130182533A1 (en) * | 2012-01-12 | 2013-07-18 | Westerngeco L.L.C. | Attentuating noise acquired in an energy measurement |
| US20140278118A1 (en) * | 2013-03-14 | 2014-09-18 | Chevron U.S.A. Inc. | System and method for attenuating noise in seismic data |
| US20160061979A1 (en) * | 2014-08-29 | 2016-03-03 | Pgs Geophysical As | Methods and systems to remove particle-motion-sensor noise from vertical-velocity data |
| US20160109591A1 (en) * | 2014-10-15 | 2016-04-21 | Westerngeco L.L.C. | Noise model estimation in multimeasurement data |
| GB2539097A (en) * | 2015-06-01 | 2016-12-07 | Pgs Geophysical As | Highly-sparse seabed acquisition designs adapted for imaging geological structure and/or monitoring reservoir production |
-
2017
- 2017-03-26 NO NO20170488A patent/NO343015B1/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110213556A1 (en) * | 2010-03-01 | 2011-09-01 | Bp Corporation North America Inc. | System and method for local attribute matching in seismic processing |
| US20130021873A1 (en) * | 2011-07-18 | 2013-01-24 | CGGVeritas Services (U.S.) Inc. | Method and device for wave fields separation in seismic data |
| US20130107664A1 (en) * | 2011-10-26 | 2013-05-02 | Nicolas Goujon | Processing multi-component seismic data |
| US20130182533A1 (en) * | 2012-01-12 | 2013-07-18 | Westerngeco L.L.C. | Attentuating noise acquired in an energy measurement |
| US20140278118A1 (en) * | 2013-03-14 | 2014-09-18 | Chevron U.S.A. Inc. | System and method for attenuating noise in seismic data |
| US20160061979A1 (en) * | 2014-08-29 | 2016-03-03 | Pgs Geophysical As | Methods and systems to remove particle-motion-sensor noise from vertical-velocity data |
| US20160109591A1 (en) * | 2014-10-15 | 2016-04-21 | Westerngeco L.L.C. | Noise model estimation in multimeasurement data |
| GB2539097A (en) * | 2015-06-01 | 2016-12-07 | Pgs Geophysical As | Highly-sparse seabed acquisition designs adapted for imaging geological structure and/or monitoring reservoir production |
Also Published As
| Publication number | Publication date |
|---|---|
| NO20170488A1 (en) | 2018-09-27 |
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