FR2283449A1 - Seismic exploration by groups of constant frequency wave trains - involves variably weighting detected signals before recombination - Google Patents

Seismic exploration by groups of constant frequency wave trains - involves variably weighting detected signals before recombination

Info

Publication number
FR2283449A1
FR2283449A1 FR7400852A FR7400852A FR2283449A1 FR 2283449 A1 FR2283449 A1 FR 2283449A1 FR 7400852 A FR7400852 A FR 7400852A FR 7400852 A FR7400852 A FR 7400852A FR 2283449 A1 FR2283449 A1 FR 2283449A1
Authority
FR
France
Prior art keywords
wave trains
constant frequency
involves
groups
detected 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.)
Granted
Application number
FR7400852A
Other languages
French (fr)
Other versions
FR2283449B3 (en
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.)
Geosource Inc
Original Assignee
Geosource 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 Geosource Inc filed Critical Geosource Inc
Priority to FR7400852A priority Critical patent/FR2283449A1/en
Publication of FR2283449A1 publication Critical patent/FR2283449A1/en
Application granted granted Critical
Publication of FR2283449B3 publication Critical patent/FR2283449B3/fr
Granted 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. analysis, for interpretation, for correction
    • 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

Abstract

A group of wave trains of constant frequency is emitted in the direction of the ground and the resulting signals are detected at a point spatially separated from the point of emission and are combined. A weighting is applied, variable with time, to the amplitude of the signals detected before this combination. This takes account of the variations in the attenuation offered by the ground as a function of frequency. The median frequencies of the wave trains may form an arithmetic progression or a geometrical progression. The emitted wave trains, may be amplitude modulated. Preferably a narrow band filter is used for the detected signal.
FR7400852A 1974-01-10 1974-01-10 Seismic exploration by groups of constant frequency wave trains - involves variably weighting detected signals before recombination Granted FR2283449A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7400852A FR2283449A1 (en) 1974-01-10 1974-01-10 Seismic exploration by groups of constant frequency wave trains - involves variably weighting detected signals before recombination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7400852A FR2283449A1 (en) 1974-01-10 1974-01-10 Seismic exploration by groups of constant frequency wave trains - involves variably weighting detected signals before recombination

Publications (2)

Publication Number Publication Date
FR2283449A1 true FR2283449A1 (en) 1976-03-26
FR2283449B3 FR2283449B3 (en) 1976-11-05

Family

ID=9133337

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7400852A Granted FR2283449A1 (en) 1974-01-10 1974-01-10 Seismic exploration by groups of constant frequency wave trains - involves variably weighting detected signals before recombination

Country Status (1)

Country Link
FR (1) FR2283449A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319346A (en) * 1980-04-21 1982-03-09 Halliburton Company Acoustic frequency spectrum logging
US4458340A (en) * 1980-07-21 1984-07-03 Standard Oil Company Borehole sonic method for porosity characterization

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319346A (en) * 1980-04-21 1982-03-09 Halliburton Company Acoustic frequency spectrum logging
US4458340A (en) * 1980-07-21 1984-07-03 Standard Oil Company Borehole sonic method for porosity characterization

Also Published As

Publication number Publication date
FR2283449B3 (en) 1976-11-05

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Legal Events

Date Code Title Description
ST Notification of lapse