NO954422L - Method for separating a component from acoustic wave - Google Patents

Method for separating a component from acoustic wave

Info

Publication number
NO954422L
NO954422L NO954422A NO954422A NO954422L NO 954422 L NO954422 L NO 954422L NO 954422 A NO954422 A NO 954422A NO 954422 A NO954422 A NO 954422A NO 954422 L NO954422 L NO 954422L
Authority
NO
Norway
Prior art keywords
array
separating
transformed
filtered
dimensional
Prior art date
Application number
NO954422A
Other languages
Norwegian (no)
Other versions
NO954422D0 (en
Inventor
Jian-Cheng Zhang
Mathew George Schmidt
Original Assignee
Western Atlas Int Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Western Atlas Int Inc filed Critical Western Atlas Int Inc
Publication of NO954422D0 publication Critical patent/NO954422D0/en
Publication of NO954422L publication Critical patent/NO954422L/en

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

Abstract

Fremgangsmåte for separering av en forutbestemt bolgeutbredende modus fra signaler som genereres av et bronnlogge- verktøy utstyrt med akustisk array. Mottagersignaler fra verktøyet digitali- seres og omformes til en todimensjonal array. Den todimensjonale array omformes til en (f,k)-array ved hjelp av en todimensjonal Fourier-transformasjon. Den aktuelle (f,k)-array blir båndpassfiltrert med henblikk på hastigheten for å utskille den forutbestemte utbredelsesmodus. Den i I filtrerte (f,k)-array omformes tilbake til ' tids/avstands-domenet ved å benytte en in- vers, todimensjonal Fourier-transforma- ', sjon. Ved en spesiell utførelse av forelig- gende oppfinnelse blir de filtrerte tidsdomene-data likhetskorrelert for fast- leggelse av en akustisk hastighet for den forutbestemte utbredelsesmodus i en jordformasjon.Method for separating a predetermined wave propagating mode from signals generated by a source logging tool equipped with acoustic array. Receiver signals from the tool are digitized and transformed into a two-dimensional array. The two-dimensional array is transformed into a (f, k) array by a two-dimensional Fourier transform. The current (f, k) array is bandpass filtered for the speed of separating the predetermined propagation mode. The I filtered (f, k) array is transformed back into the 'time / distance domain using an inverse, two-dimensional Fourier transform'. In a particular embodiment of the present invention, the filtered time domain data is similarly correlated to establish an acoustic rate for the predetermined propagation mode in an earth formation.

NO954422A 1994-11-08 1995-11-03 Method for separating a component from acoustic wave NO954422L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33567994A 1994-11-08 1994-11-08

Publications (2)

Publication Number Publication Date
NO954422D0 NO954422D0 (en) 1995-11-03
NO954422L true NO954422L (en) 1996-05-09

Family

ID=23312803

Family Applications (1)

Application Number Title Priority Date Filing Date
NO954422A NO954422L (en) 1994-11-08 1995-11-03 Method for separating a component from acoustic wave

Country Status (3)

Country Link
CA (1) CA2162065A1 (en)
GB (1) GB2295014B (en)
NO (1) NO954422L (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1048799A (en) * 1998-11-20 2000-06-13 Smits, Anthony Processing well log data
US6611764B2 (en) 2001-06-08 2003-08-26 Pgs Americas, Inc. Method and system for determining P-wave and S-wave velocities from multi-component seismic data by joint velocity inversion processing
US7698066B2 (en) 2005-01-14 2010-04-13 Exxonmobil Upstream Research Company Method and apparatus for estimating formation slowness
CN109597021B (en) * 2018-11-05 2021-02-05 北京航天控制仪器研究所 Direction-of-arrival estimation method and device
CN111380957B (en) * 2020-03-11 2021-02-19 大连理工大学 Ultrasonic guided wave detection method based on frequency-wavenumber domain filtering
CN112379403B (en) * 2020-12-14 2024-01-16 北京华晖探测科技股份有限公司 Detection method and system for underground goaf

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067112A (en) * 1991-01-04 1991-11-19 Mobil Oil Corporation Method for removing coherent noise from seismic data through f-x filtering

Also Published As

Publication number Publication date
GB9522794D0 (en) 1996-01-10
NO954422D0 (en) 1995-11-03
GB2295014A (en) 1996-05-15
GB2295014B (en) 1998-04-29
CA2162065A1 (en) 1996-05-09

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