FR2305060A1 - Monochromatic filter for seismic signals - generates cancellation signal equal in amplitude and phase to interference - Google Patents

Monochromatic filter for seismic signals - generates cancellation signal equal in amplitude and phase to interference

Info

Publication number
FR2305060A1
FR2305060A1 FR7508577A FR7508577A FR2305060A1 FR 2305060 A1 FR2305060 A1 FR 2305060A1 FR 7508577 A FR7508577 A FR 7508577A FR 7508577 A FR7508577 A FR 7508577A FR 2305060 A1 FR2305060 A1 FR 2305060A1
Authority
FR
France
Prior art keywords
amplitude
interference
phase
cancellation signal
seismic signals
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.)
Withdrawn
Application number
FR7508577A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Upstream Research Co
Original Assignee
Exxon Production Research Co
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 Exxon Production Research Co filed Critical Exxon Production Research Co
Priority to FR7508577A priority Critical patent/FR2305060A1/en
Publication of FR2305060A1 publication Critical patent/FR2305060A1/en
Withdrawn legal-status Critical Current

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
    • G01V1/28—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
    • G01V1/364—Seismic filtering
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • 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
    • G01V2210/21—Frequency-domain filtering, e.g. band pass

Landscapes

  • 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)
  • Geophysics And Detection Of Objects (AREA)

Abstract

An electronic filter removes approximately sinusoidal parasitic or interference waveforms from signals received by geophones during seismic exploration. The filter mechanism is based on the use of a second signal having the same frequency and amplitude as that of the interference, this signal being used to cancel the unwanted one. The phase and amplitude of the two signals are compared providing control signals correcting any dissimilarity. A third reference signal enables the basis of further phase correction to be derived from its comparison with the residual waveform. Analysis of phase and amplitude relationships is obtained by manipulation of pulse trains having frequencies which are multiples of the interference.
FR7508577A 1975-03-19 1975-03-19 Monochromatic filter for seismic signals - generates cancellation signal equal in amplitude and phase to interference Withdrawn FR2305060A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7508577A FR2305060A1 (en) 1975-03-19 1975-03-19 Monochromatic filter for seismic signals - generates cancellation signal equal in amplitude and phase to interference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7508577A FR2305060A1 (en) 1975-03-19 1975-03-19 Monochromatic filter for seismic signals - generates cancellation signal equal in amplitude and phase to interference

Publications (1)

Publication Number Publication Date
FR2305060A1 true FR2305060A1 (en) 1976-10-15

Family

ID=9152764

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7508577A Withdrawn FR2305060A1 (en) 1975-03-19 1975-03-19 Monochromatic filter for seismic signals - generates cancellation signal equal in amplitude and phase to interference

Country Status (1)

Country Link
FR (1) FR2305060A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349235A1 (en) * 1976-04-19 1977-11-18 Exxon Production Research Co METHOD AND APPARATUS FOR ELIMINATION OF A PARASITE SIGNAL IN SEISMIC SIGNALS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349235A1 (en) * 1976-04-19 1977-11-18 Exxon Production Research Co METHOD AND APPARATUS FOR ELIMINATION OF A PARASITE SIGNAL IN SEISMIC SIGNALS

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Legal Events

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ST Notification of lapse