US3946356A
Expired / Lapsed
US
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Synthetic display of seismic reflection strength
Assignee: Seiscom Delta Inc
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Filing: 1974-02-22
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Granted: 1976-03-23
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Expires: 1994-02-22
Abstract
Abstract A synthetic display is provided, in cross-sectional form, of the theoretical strength of seismic reflections. The theoretical strength is computed from calculated inverval-velocity values and known or estimated density values. By comparison of this synthetic reflection-strength display with the observed reflection-strength display, useful conclusions may be drawn about the nature of geological materials and the complex origin of reflections.
Inventors
- 👤 Nigel A. Anstey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:12
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/282; G01V2210/00; G01V2210/60; G01V2210/61; G01V2210/614
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
96 words
A method of making a synthetic seismic section from seismic interval velocity characteristic of seismic signals in intervals between seismic horizons for analysis of an observed seismic time or depth section, comprising the steps of: a. forming a synthetic representation of seismic signal strength for the seismic horizon by forming a ratio of the difference between interval velocities in intervals adjacent the seismic horizons to the sum of interval velocities in intervals adjacent the seismic horizons; and b. displaying the synthetic representation of seismic signal strength for the horizons in the form of a seismic section.
Claim 2
Independent Claim
96 words
A method of making a synthetic seismic section from seismic interval velocity characteristic of seismic signals in intervals between seismic horizons for analysis of an observed seismic time or depth section, comprising the steps of: a. forming a synthetic representation of seismic signal strength for the seismic horizon by forming a ratio of the difference between interval velocities in intervals adjacent the seismic horizons to the sum of interval velocities in intervals adjacent the seismic horizons; and b. displaying the synthetic representation of seismic signal strength for the horizons in the form of a seismic section.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein said step of displaying comprises the step of: superimposing the synthetic representation of seismic signal strength on the observed seismic section.
Claim 4
Dependent Claim
31 words
The method of claim 1, wherein said step of displaying comprises the step of: displaying the synthetic representation of seismic signal strength as a color superposition on the observed seismic section.
Claim 5
Dependent Claim
20 words
The method of claim 1, further including the step of: displaying the reflection strength of the observed section in color.
Claim 6
Dependent Claim
39 words
The method of claim 1, wherein said step of displaying comprises the step of: displaying the reflection strength of the observed section in color, wherein the synthetic representation may be compared with the reflection strength of the observed section.
Claim 7
Dependent Claim
18 words
The method of claim 1, further including the steps of: displaying the reflection strength of the observed section.
Claim 8
Dependent Claim
33 words
The method of claim 6, further including the step of: normalizing both the synthetic representation of signal strength and the reflection strength of the observed section by the strength of a fiducial reflection.
Claim 9
Dependent Claim
32 words
The method of claim 1, further including the step of: filtering the synthetic representation of signal strength to impart thereto the general character of an observed seismic reflection in the observed section.
Claim 10
Independent Claim
90 words
A method of making a synthetic seismic section indicating reflection strength of seismic reflectors in an observed time or depth seismic section utilizing the following steps: a. computing the seismic velocity in the zones above and below the seismic reflectors; b. computing for each reflector a synthetic reflection strength characteristic which is given by the difference of the velocities above and below the reflector divided by the sum of the velocities above and below the reflector; and c. displaying the synthetic reflection strength characteristic superimposed upon the observed seismic section.
Claim 11
Independent Claim
90 words
A method of making a synthetic seismic section indicating reflection strength of seismic reflectors in an observed time or depth seismic section utilizing the following steps: a. computing the seismic velocity in the zones above and below the seismic reflectors; b. computing for each reflector a synthetic reflection strength characteristic which is given by the difference of the velocities above and below the reflector divided by the sum of the velocities above and below the reflector; and c. displaying the synthetic reflection strength characteristic superimposed upon the observed seismic section.
Claim 12
Independent Claim
62 words
A method of making a synthetic seismic section from seismic interval velocity characteristics of seismic signals in layers between seismic horizons for analysis of an observed seismic time or depth section, comprising the steps of: a. forming a synthetic representation of seismic signal strength for the seismic horizons by forming a synthetic reflection coefficient for the horizons by performing the steps of:
Claim 13
Independent Claim
62 words
A method of making a synthetic seismic section from seismic interval velocity characteristics of seismic signals in layers between seismic horizons for analysis of an observed seismic time or depth section, comprising the steps of: a. forming a synthetic representation of seismic signal strength for the seismic horizons by forming a synthetic reflection coefficient for the horizons by performing the steps of:
Claim 14
Dependent Claim
84 words
forming the product of the interval velocity characteristic and a probable value of density for each of the layers adjacent the seismic horizons; and 2. forming a ratio of the difference to the sum of the products formed of the interval velocity characteristic and probable value of density for the layers adjacent the seismic horizons to thereby form the synthetic representation of seismic signal strength; and b. displaying the synthetic representation of signal strength for the horizons in the form of a seismic section.
Claim 15
Dependent Claim
84 words
forming the product of the interval velocity characteristic and a probable value of density for each of the layers adjacent the seismic horizons; and 2. forming a ratio of the difference to the sum of the products formed of the interval velocity characteristic and probable value of density for the layers adjacent the seismic horizons to thereby form the synthetic representation of seismic signal strength; and b. displaying the synthetic representation of signal strength for the horizons in the form of a seismic section.
Claim 16
Dependent Claim
26 words
The method of claim 10, wherein said step of displaying comprises the step of: superimposing the synthetic representation of signal strength on the observed seismic section.
Claim 17
Dependent Claim
30 words
The method of claim 10, wherein said step of displaying comprises the step of: displaying the synthetic representation of signal strength as a color superposition on the observed seismic section.
Claim 18
Dependent Claim
20 words
The method of claim 10, further including the step of: displaying the reflection strength of the observed section in color.
Claim 19
Independent Claim
153 words
A method of making a synthetic seismic section from seismic interval velocity characteristics of seismic signals in layers between seismic horizons for analysis of an observed seismic time or depth section, comprising the steps of: a. forming a synthetic representation of seismic signal strength for the horizons by forming a plurality of synthetic representations of signal strength at the seismic horizons by performing the steps of: 1. forming the product of the interval velocity characteristic and a range of probable values of densities for each of the layers adjacent the seismic horizons; and 2. forming ratios of the difference to the sum of the products formed of the interval velocity characteristic and probable values of density for the layers adjacent the seismic horizons to thereby form the synthetic representation of seismic signal strength; and b. displaying the synthetic representation of signal strength for the seismic horizons in the form of a seismic section.
Claim 20
Independent Claim
153 words
A method of making a synthetic seismic section from seismic interval velocity characteristics of seismic signals in layers between seismic horizons for analysis of an observed seismic time or depth section, comprising the steps of: a. forming a synthetic representation of seismic signal strength for the horizons by forming a plurality of synthetic representations of signal strength at the seismic horizons by performing the steps of: 1. forming the product of the interval velocity characteristic and a range of probable values of densities for each of the layers adjacent the seismic horizons; and 2. forming ratios of the difference to the sum of the products formed of the interval velocity characteristic and probable values of density for the layers adjacent the seismic horizons to thereby form the synthetic representation of seismic signal strength; and b. displaying the synthetic representation of signal strength for the seismic horizons in the form of a seismic section.
Claim 21
Dependent Claim
26 words
The method of claim 14, wherein said step of displaying comprises the step of: superimposing the synthetic representation of signal strength on the observed seismic section.
Claim 22
Dependent Claim
30 words
The method of claim 14, wherein said step of displaying comprises the step of: displaying the synthetic representation of signal strength as a color superposition on the observed seismic section.
Claim 23
Dependent Claim
20 words
The method of claim 14, further including the step of: displaying the reflection strength of the observed section in color.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |