GB1190792A - Space Averaged Dynamic Correlation Analysis of Seismic Signals - Google Patents
Space Averaged Dynamic Correlation Analysis of Seismic SignalsInfo
- Publication number
- GB1190792A GB1190792A GB21411/67A GB2141167A GB1190792A GB 1190792 A GB1190792 A GB 1190792A GB 21411/67 A GB21411/67 A GB 21411/67A GB 2141167 A GB2141167 A GB 2141167A GB 1190792 A GB1190792 A GB 1190792A
- Authority
- GB
- United Kingdom
- Prior art keywords
- traces
- time
- primary
- correlation
- correlations
- 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.)
- Expired
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
- 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
- G06E—OPTICAL COMPUTING DEVICES; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES
- G06E3/00—Devices not provided for in group G06E1/00, e.g. for processing analogue or hybrid data
- G06E3/001—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements
- G06E3/003—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
-
- 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
- G06G7/1928—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 for forming correlation integrals; for forming convolution integrals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/50—Corrections or adjustments related to wave propagation
- G01V2210/52—Move-out correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/50—Corrections or adjustments related to wave propagation
- G01V2210/53—Statics correction, e.g. weathering layer or transformation to a datum
Abstract
1,190,792. Processing seismic records. TEXAS INSTRUMENTS Inc. 9 May, 1967 [16 May, 1966], No. 21411/67. Heading H4D. Seismic data relating to a reflecting horizon is averaged by cross-correlating the commonlycentred time gates of a pair of traces which include reflection from the horizon and were derived using two different energy travel path geometries, cross-correlating commonly-centred time gates of a second pair of traces which include reflection from the horizon and were derived using two different path geometries, and summing the two correlation results. The processing may be applied to at least three traces obtained by common depth point or continuous profiling methods and reproduced from digital magnetic tape records. In the Fig. 1 example for giving six-fold subsurface coverage of depth points a series of 24-trace records is made by shooting at locations A, B, C &c. in turn into the end of a linear array of 24 equispaced geophones. Denoting the respective traces derived using shot points A, B &c. and geophones 1, 2 . . . 24 as A1 . . . A24, B1 . . . B24 &c., then traces F1, E5, D9, C13, B17, A21 (i.e. traces having a " space lag " of four geophone spacings) all involve one common depth point, traces G1, F5, E9 &c. involve a second common depth point and so on. After correction for normal movement error the said time gates of traces F1 and E5 are cross-correlated and similar time gates of traces G1 and F5 are cross-correlated. These two primary " 1,5 " correlations are then summed to give an output correlation signal. Further output correlation signals are similarly derived from " 2,6," " 3,7," " 4,8," &c. primary correlations and the output correlation signals are displayed against a correlation delay time time-base. In practice each output correlation signal may be derived by summing more than two primary correlation signals (e.g. twenty to thirty or more may be summed). The processing is repeated for different time gates along the trace length: the time gate centres may be separated by equal increments of record time and the gates may be of different length and in spaced, contiguous, or overlapping relation. Where the time gates used in the processing are taken at late record time, the primary and multiple events in the display can be distinguished more readily if there is a large residual moveout between traces and to this end the traces selected for the primary cross-correlations are then those with a " space lag " of more than four geophone spacings, e.g. eight, twelve &c. spacings. To determine the static error corrections (which may be applied to the primary correlations before they are summed), the primary correlations are cross-correlated in pairs to give secondary correlations. The time shift of the peak of a secondary correlation, relative to the correlation delay time origin, is the time shift which must be applied as the static error correction between the primary correlations yielding that particular secondary correlation. Additional processing may comprise velocity filtering of the output correlation signals. The application of the invention to processing traces obtained by continuous profiling methods differs in the selection of traces for the primary cross-correlation; details are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55031466A | 1966-05-16 | 1966-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1190792A true GB1190792A (en) | 1970-05-06 |
Family
ID=24196649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21411/67A Expired GB1190792A (en) | 1966-05-16 | 1967-05-09 | Space Averaged Dynamic Correlation Analysis of Seismic Signals |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE1623580A1 (en) |
FR (1) | FR1522965A (en) |
GB (1) | GB1190792A (en) |
MY (1) | MY7300362A (en) |
NL (1) | NL6706781A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2629997B1 (en) * | 1988-04-19 | 1990-08-17 | Labo Electronique Physique | CORRELATION MEASUREMENT DEVICE FOR SPEED OF MOVING ORGANS AND BLOOD FLOWS |
-
1967
- 1967-05-09 GB GB21411/67A patent/GB1190792A/en not_active Expired
- 1967-05-16 NL NL6706781A patent/NL6706781A/xx unknown
- 1967-05-16 DE DE19671623580 patent/DE1623580A1/en active Pending
- 1967-05-16 FR FR106532A patent/FR1522965A/en not_active Expired
-
1973
- 1973-12-31 MY MY1973362A patent/MY7300362A/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR1522965A (en) | 1968-04-26 |
MY7300362A (en) | 1973-12-31 |
NL6706781A (en) | 1967-11-17 |
DE1623580A1 (en) | 1971-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |