GB1111731A – Optimum data stacking
– Google Patents
GB1111731A – Optimum data stacking
– Google Patents
Optimum data stacking
Info
Publication number
GB1111731A
GB1111731A
GB3456665A
GB3456665A
GB1111731A
GB 1111731 A
GB1111731 A
GB 1111731A
GB 3456665 A
GB3456665 A
GB 3456665A
GB 3456665 A
GB3456665 A
GB 3456665A
GB 1111731 A
GB1111731 A
GB 1111731A
Authority
GB
United Kingdom
Prior art keywords
signals
noise
correlation functions
recorded
drums
Prior art date
1964-08-12
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.)
Expired
Application number
GB3456665A
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments 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.)
1964-08-12
Filing date
1965-08-12
Publication date
1968-05-01
1965-08-12
Application filed by Texas Instruments Inc
filed
Critical
Texas Instruments Inc
1968-05-01
Publication of GB1111731A
publication
Critical
patent/GB1111731A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
G01V1/362—Effecting static or dynamic corrections; Stacking
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06G—ANALOGUE COMPUTERS
G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
G06G7/1914—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions using a magnetic medium, a linear filter
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
Abstract
1,111,731. Seismic prospecting. TEXAS INSTRUMENTS Inc. 12 Aug., 1965 [12 Aug., 1964], No. 34566/65. Heading H4D. [Also in Divisions G1 and G4] A method of processing a set of related signals having desired signal components and noise components with different time and amplitude distributions comprises the steps of (a) auto-correlating each constituent of the set and cross-correlating each constituent with every other constituent of the set to produce a first suite of correlation functions characterizing noise components in the set, (b) deriving a second like suite of correlation functions characterizing desired signal components in the set, (c) deriving a set of correlation functions representing the best estimate of noise-free signals in the set of related signals, (d) modifying each of the related signals in dependence on the two suites and the set of correlation functions, and (e) combining and recording the modified signals to provide signals in which the desired signal is enhanced relative to noise. In a seismic signal processing embodiment, seismic waves generated successively at a plurality of shot points are detected by a group of geophones whose outputs are corrected for static and normal moveout errors and recorded on drums 10 and 11 (Fig. 1), on which traces recorded on channels 13 and 17 correspond to the first shot point, those on channels 14 and 18 correspond to the second shot point, and so on. To provide correlation functions characterizing noise the traces are reproduced from the drums and portions in which noise predominates (e.g. portions at late record time) are selected by time gates 38, 39 and applied to correlators 40 to 49. Incremental time delays between the output signals from the two drums are introduced by relative angular displacements of the drums and define the delay intervals associated with the correlation function coefficients produced by the correlators 40 to 79. The correlator outputs are recorded on drum 36, the noise auto-correlation functions for traces associated with the shot points being recorded on channels 70 to 73 respectively and the noise cross-correlation functions on channels 74 to 79. To provide correlation functions characterizing desired signals, traces reproduced from drums 10 and 11 are applied to summing units 101 to 104 for compositing all signals from a given shot. The composite signals are then recorded on drums 30 and 31. Early record portions of the composite signals, in which desired signals predominate, are selected by gate 106 and applied to correlators 50 to 59. Drums 30 and 31 provide the correlation delay intervals, as above, and the auto- and cross-correlation function coefficients from correlators 50 to 59 are recorded on channels 80 to 89. Correlation functions representing substantially noise-free signals are provided by summing the composite signals from units 101 to 104, and correlating this sum signal with itself and with each composite signal separately in correlators 60 to 63. These correlation functions are recorded on channels 90 to 93. Parameters of a timedomain filter for inverse filtering of the detected seismic signals to enhance the signal/noise ratio are computed in a filter synthesizer 130 from a matrix equation relating the correlation functions characterizing the noise, the desired signals and the substantially noise-free signals. These parameters determine the gains of amplifiers (163) of a magnetic delay line filter (Fig. 2) and hence the proportions in which the detected seismic signals, subjected to multiple delays by means of a delay drum (160), are combined by summing units (164 to 167) to provide filtered signals which are subsequently composited and recorded. Solution of the matrix equation may be performed by digital or analogue computer. Details are given of an analogue system (Fig. 3) in which the correlation functions from drum 36 are combined by multipliers 210, 211, 226, 228, 234, 235, adders 214, 227, 228 and dividers 216, 236 to provide voltages for controlling the gains of inverse-filter amplifiers 232 and 239 and which are analogues of solutions of a simplified exemplary matrix equation.
GB3456665A
1964-08-12
1965-08-12
Optimum data stacking
Expired
GB1111731A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US38910064A
1964-08-12
1964-08-12
Publications (1)
Publication Number
Publication Date
GB1111731A
true
GB1111731A
(en)
1968-05-01
Family
ID=23536811
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3456665A
Expired
GB1111731A
(en)
1964-08-12
1965-08-12
Optimum data stacking
Country Status (3)
Country
Link
DE
(1)
DE1282338B
(en)
GB
(1)
GB1111731A
(en)
NL
(1)
NL6510571A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN111538085A
(en)
*
2020-05-18
2020-08-14
中国石油天然气集团有限公司
Method, device, equipment and storage medium for extracting effective seismic signals
1965
1965-08-12
DE
DE1965T0029201
patent/DE1282338B/en
not_active
Withdrawn
1965-08-12
GB
GB3456665A
patent/GB1111731A/en
not_active
Expired
1965-08-12
NL
NL6510571A
patent/NL6510571A/xx
unknown
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN111538085A
(en)
*
2020-05-18
2020-08-14
中国石油天然气集团有限公司
Method, device, equipment and storage medium for extracting effective seismic signals
Also Published As
Publication number
Publication date
DE1282338B
(en)
1968-11-07
NL6510571A
(en)
1966-02-14
Similar Documents
Publication
Publication Date
Title
US3629800A
(en)
1971-12-21
Gapped deconvolution reverberation removal
US4276620A
(en)
1981-06-30
Method and apparatus for obtaining a composite field response _to a variable source array using weighting coefficients
US4204279A
(en)
1980-05-20
Method for enhancing seismic data
US3496529A
(en)
1970-02-17
Methods and apparatus for identifying or attenuating undesired multiple reflections in a seismic wave record
Buchholtz
1972
A note on signal distortion due to dynamic (NMO) corrections
GB1059448A
(en)
1967-02-22
Method and apparatus for linear processing of seismic data
GB1056481A
(en)
1967-01-25
Data processing
GB1245041A
(en)
1971-09-02
Improvements relating to geophysical prospecting methods
US3217828A
(en)
1965-11-16
Seismic prospecting
US3794827A
(en)
1974-02-26
Invel system of velocity determination
US3979713A
(en)
1976-09-07
Method of marine reflection-type seismic exploration
US3223967A
(en)
1965-12-14
Eliminating seismic interference waves by a cancellation procedure
US3705382A
(en)
1972-12-05
Methods for improved deconvolution of seismic or similar data
US3418625A
(en)
1968-12-24
Methods and apparatus for attenuating the effects of multiple seismic reflections
US2956261A
(en)
1960-10-11
Bubble oscillation eliminator
GB1111731A
(en)
1968-05-01
Optimum data stacking
US4298966A
(en)
1981-11-03
Removal of surface layer anomaly effects
US3697939A
(en)
1972-10-10
Corrections for seismic data obtained from expanding-spread
US3587039A
(en)
1971-06-22
Section multiple attenuator
US3040833A
(en)
1962-06-26
Seismic exploration
GB1097963A
(en)
1968-01-03
Hybrid data-processing system
Silverman
1967
The digital processing of seismic data
GB1092487A
(en)
1967-11-22
Time variant inverse filter
US3014551A
(en)
1961-12-26
Correlation of seismic signals
US3131375A
(en)
1964-04-28
Multiple removal system
None