US3784967A
Expired / Lapsed
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Seismic record processing method
Assignee: Chevron USA Inc
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Filing: 1971-07-02
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Granted: 1974-01-08
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Expires: 1991-07-02
Abstract
Abstract A seismic record processing method is described wherein groups of traces comprising the original record are sonogrammed and events selected to identify, within each group of sonogram traces, coherent energy at specified record moveouts wherein the aforementioned coherencies are advantageously enhanced; after the picked sonogram traces are again sonogrammed to produce traces of a simulated record, the simulated traces are combined (''''mixed''''), with corresponding traces of the original record whereby both trace-to-trace coherency and across-the-section continuity of the resulting final display, are surprisingly improved.
Inventors
- 👤 J Graul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:08
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
248 words
A method of converting an original multitrace seismic section to a composite seismic section having both improved trace-totrace coherence and improved across-the-section continuity, said composite seismic section being composed of said original section and a simulated seismic section, said original section consisting of a plurality of multitrace seismic records of amplitude-versushorizontal coordinate-and-time seismic traces, each of said traces constituting energy derived from at least one seismic source and detected by at least one surface geophone and representing, in part, reflections from subsurface formations, and said simulated seismic section contituting a plurality of amplitude-versus-horizontal coordinate-and-time traces of seismic data at least some of which have undergone transformation modification and inverse transformation said conversion comprising the steps of: a. sonogramming said original traces, a group of traces at a time, to produce amplitude-versus moveout-and-time sonogram traces, each of said sonogram traces being identified by a respective horizontal coordinate associated with its sonogram pivot point and by its represented moveout, b. picking each of said sonogram traces to identify selected seismic data on the basis of selection codes that tend to assure authenticity that said data relates to reflection events of interest, c. sonogramming said picked sonogram traces to produce a plurality of simulated amplitude-versus-horizontal coordinateand-time seismic traces, and d. mixing, in time synchronism, amplitude representations of at least some of said original traces with amplitude representations of those of said simulated traces that have corresponding horizontal coordinates to produce a plurality of mixed traces comprising said composite seismic time section.
Claim 2
Independent Claim
248 words
A method of converting an original multitrace seismic section to a composite seismic section having both improved trace-totrace coherence and improved across-the-section continuity, said composite seismic section being composed of said original section and a simulated seismic section, said original section consisting of a plurality of multitrace seismic records of amplitude-versushorizontal coordinate-and-time seismic traces, each of said traces constituting energy derived from at least one seismic source and detected by at least one surface geophone and representing, in part, reflections from subsurface formations, and said simulated seismic section contituting a plurality of amplitude-versus-horizontal coordinate-and-time traces of seismic data at least some of which have undergone transformation modification and inverse transformation said conversion comprising the steps of: a. sonogramming said original traces, a group of traces at a time, to produce amplitude-versus moveout-and-time sonogram traces, each of said sonogram traces being identified by a respective horizontal coordinate associated with its sonogram pivot point and by its represented moveout, b. picking each of said sonogram traces to identify selected seismic data on the basis of selection codes that tend to assure authenticity that said data relates to reflection events of interest, c. sonogramming said picked sonogram traces to produce a plurality of simulated amplitude-versus-horizontal coordinateand-time seismic traces, and d. mixing, in time synchronism, amplitude representations of at least some of said original traces with amplitude representations of those of said simulated traces that have corresponding horizontal coordinates to produce a plurality of mixed traces comprising said composite seismic time section.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein Step d is further characterized by varying, in accordance with a predetermined function of time, relative mixing proportions of said original traces and said simulated traces.
Claim 4
Dependent Claim
27 words
The method of claim 1 in which at least one of said sonogram traces is omitted from the remainder of the method after the picking Step b.
Claim 5
Dependent Claim
15 words
The method of claim 3 in which the omission of traces is varied with time.
Claim 6
Dependent Claim
35 words
The method of claim 1 in which at least one of said sonogram traces is used with a negative sign in Steps c and d to effect a subtraction of information desired to be suppressed.
Claim 7
Dependent Claim
20 words
The method of claim 5 in which the negative sign is used during only part of the total record time.
Claim 8
Dependent Claim
140 words
The method of claim 1 in which said groups of traces in Step a overlap each other, and therefore some of the resulting said simulated seismic traces of Step c have the same said corresponding horizontal coordinates, and in Step d both members of the pairs of said simulated traces having the same said corresponding horizontal coordinates are mixed with said original traces having the same said horizontal coordinates, the mixing of said simulated traces being performed in complimentary proPortions, changing from one horizontal coordinate to the next, so that the effect of a set of simulated traces derived from a more leftward group of original traces changes gradually into the effect of a set of simulated traces derived from an overlapping more rightward group of original traces, and the resulting composite seismic section therefore shows further improved across-the-section continuity.
Claim 9
Independent Claim
265 words
A method of converting an original multitrace seismic section to a composite seismic section having both improved trace-to-trace coherence and improved across-the-section continuity, said composite seismic section being composed of said original section and a simulated seismic section, said original section consisting of a plurality of multitrace seismic records of amplitude-versus-horizontal coordinate-and-time seismic traces each of said traces constituting energy derived from at least one seismic source and detected by at least one surface geophone and representing, in part, reflections from subsurface formations, and said simulated seismic section constituting a plurality of amplitude-versus-horizontal coordinate-and-time traces of seismic data derived from said original seismic traces and selected on the basis of selection codes that tend to assure authenticity that the data relates to reflection events of interest at least some of said traces having undergone transformation modification and inverse transformation said conversion comprising the steps of: a. transforming values of amplitude-versus-horizontal coordinate-and time within said original traces, a group of traces at a time, to produce directional values of amplitude-versus-moveout-and-time traces, each of said directional traces being identified by a respective horizontal coordinate and by a represented moveout, b. picking said directional traces to identify said selected seismic data, c. retransforming said picked directional values of amplitude-versus-moveout-and-time traces back into values of amplitude-versus-horizontal coordinate-and time to provide a plurality of simulated seismic traces, and d. mixing, in time synchronism, amplitude representations of at least some of said original traces with amplitude representations of those of said simulated traces that have corresponding horizontal coordinates to produce a plurality of mixed traces comprising said composite seismic time section.
Claim 10
Independent Claim
265 words
A method of converting an original multitrace seismic section to a composite seismic section having both improved trace-to-trace coherence and improved across-the-section continuity, said composite seismic section being composed of said original section and a simulated seismic section, said original section consisting of a plurality of multitrace seismic records of amplitude-versus-horizontal coordinate-and-time seismic traces each of said traces constituting energy derived from at least one seismic source and detected by at least one surface geophone and representing, in part, reflections from subsurface formations, and said simulated seismic section constituting a plurality of amplitude-versus-horizontal coordinate-and-time traces of seismic data derived from said original seismic traces and selected on the basis of selection codes that tend to assure authenticity that the data relates to reflection events of interest at least some of said traces having undergone transformation modification and inverse transformation said conversion comprising the steps of: a. transforming values of amplitude-versus-horizontal coordinate-and time within said original traces, a group of traces at a time, to produce directional values of amplitude-versus-moveout-and-time traces, each of said directional traces being identified by a respective horizontal coordinate and by a represented moveout, b. picking said directional traces to identify said selected seismic data, c. retransforming said picked directional values of amplitude-versus-moveout-and-time traces back into values of amplitude-versus-horizontal coordinate-and time to provide a plurality of simulated seismic traces, and d. mixing, in time synchronism, amplitude representations of at least some of said original traces with amplitude representations of those of said simulated traces that have corresponding horizontal coordinates to produce a plurality of mixed traces comprising said composite seismic time section.
Claim 11
Dependent Claim
88 words
The method of claim 5 including said plurality of mixed traces at least one of which having been aided by subtraction of the information desired to be suppressed, with the additional step of e. repeating Steps a - d for a second application of the method of the present invention so as to aid in the identification of relevant seismic data within the original traces, said relevant data meeting selection criteria of Step b during the second application but not necessarily during the first application of the method.
Claim 12
Independent Claim
238 words
A method of converting an original multitrace seismic section to a composite seismic section having both improved trace-to-trace coherence and improved across-the-section continuity, said composite seismic section being composed of said original section and a simulated seismic section, said original section consisting of a plurality of multitrace seismic records of amplitude-versus-horizontal coordinate-and-time seismic traces, each of said traces constituting energy derived from at least one seismic source and detected by at least one surface geophone and representing, in part, reflections from subsurface formations, and said simulated seismic section constituting a plurality of amplitude-versus-time traces of selected seismic data at least some of which have undergone transformation modification, said conversion comprising the steps of: a. computing from values of amplitude-versus-horizontal coordinate-and-time within said original traces, values of a two-dimensional transform of said first-mentioned values in a second domain in which at least one of the variables is related to moveout; b. extracting from said last-mentioned transformation certain values which identify seismic data meeting specified selection codes that tend to assure that such values relate to seismic reflection events of interest; c. inverse transforming said two-dimensional transform to produce values of amplitude-versus-horizontal coordinate-and-time forming said simulated seismic section; d. mixing, in time synchronism amplitude representations of at least some of said original traces with amplitude representations of those of said simulated traces that have corresponding horizontal coordinates to produce a plurality of mixed traces comprising said composite seismic time section.
Claim 13
Independent Claim
238 words
A method of converting an original multitrace seismic section to a composite seismic section having both improved trace-to-trace coherence and improved across-the-section continuity, said composite seismic section being composed of said original section and a simulated seismic section, said original section consisting of a plurality of multitrace seismic records of amplitude-versus-horizontal coordinate-and-time seismic traces, each of said traces constituting energy derived from at least one seismic source and detected by at least one surface geophone and representing, in part, reflections from subsurface formations, and said simulated seismic section constituting a plurality of amplitude-versus-time traces of selected seismic data at least some of which have undergone transformation modification, said conversion comprising the steps of: a. computing from values of amplitude-versus-horizontal coordinate-and-time within said original traces, values of a two-dimensional transform of said first-mentioned values in a second domain in which at least one of the variables is related to moveout; b. extracting from said last-mentioned transformation certain values which identify seismic data meeting specified selection codes that tend to assure that such values relate to seismic reflection events of interest; c. inverse transforming said two-dimensional transform to produce values of amplitude-versus-horizontal coordinate-and-time forming said simulated seismic section; d. mixing, in time synchronism amplitude representations of at least some of said original traces with amplitude representations of those of said simulated traces that have corresponding horizontal coordinates to produce a plurality of mixed traces comprising said composite seismic time section.
Claim 14
Dependent Claim
24 words
The method of claim 10 in which said two-dimensional transform computed from values of amplitude-versus-horizontal coordinate-and-time within said original traces, is a Fourier transform.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |