US4751655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reconstituting seismic data
Assignee: BP Corp North America Inc
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Filing: 1986-06-11
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Granted: 1988-06-14
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Expires: 2006-06-11
Abstract
Abstract At least two methods of reconstituting the original form of a time/amplitude trace, such as seismic data, are disclosed wherein the seismic data has been rectified by a scanner to produce a signal representative of a hardcopy display of the trace. One of the methods comprises selecting a time window of a certain duration, obtaining a measurement of the predominant period within the selected positive components of the signal, and filtering the signal with a bandpass filter having a range of about F/2 to about 3F/2, where F equals the reciprocal of the predominant period of the signal.
Inventors
- 👤 Kenneth L. Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:03
CPC Classifications
H; H03; H03H; H03H17/00; H03H17/02; G; G01; G01V; G01V1/00; G01V1/28; G01V1/32; G01V2210/00; G01V2210/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A method of reconstituting a time/amplitude trace, which has been rectified by a scanner to produce a signal representative of a hardcopy display of the time/amplitude trace, comprising: (a) selecting a time window of a certain duration; (b) obtaining a measurement of a predominant period of the signal within the selected time window; and (c) filtering the signal with a bandpass filter having a range of about F/2 to about 3F/2, where F equals the reciprocal of the predominant period of the signal.
Claim 2
Independent Claim
83 words
A method of reconstituting a time/amplitude trace, which has been rectified by a scanner to produce a signal representative of a hardcopy display of the time/amplitude trace, comprising: (a) selecting a time window of a certain duration; (b) obtaining a measurement of a predominant period of the signal within the selected time window; and (c) filtering the signal with a bandpass filter having a range of about F/2 to about 3F/2, where F equals the reciprocal of the predominant period of the signal.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein step (b) comprises counting positive components within the selected time window.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein step (c) comprises a band-limited interpolator to restore missing portions of the signal.
Claim 5
Independent Claim
66 words
A method of reconstituting a time/amplitude trace, which has been rectified by a scanner to produce a signal representative of a hardcopy display of the time/amplitude trace, comprising: (a) selecting positive components of the signal; (b) determining which positive components of (a) have been amplitude clipped; (c) rejecting determined amplitude clipped components; and (d) interpolating nonrejected positive components of the signal to reconstitute the time/amplitude trace.
Claim 6
Independent Claim
66 words
A method of reconstituting a time/amplitude trace, which has been rectified by a scanner to produce a signal representative of a hardcopy display of the time/amplitude trace, comprising: (a) selecting positive components of the signal; (b) determining which positive components of (a) have been amplitude clipped; (c) rejecting determined amplitude clipped components; and (d) interpolating nonrejected positive components of the signal to reconstitute the time/amplitude trace.
Claim 7
Dependent Claim
12 words
The method of claim 4 whereien step (d) includes using cubic-spline interpolation.
Claim 8
Dependent Claim
18 words
The method of claim 4 and including a step (e) which comprises bandpass filtering the signal of (d).
Claim 9
Independent Claim
77 words
A method of reconstituting a time/amplitude trace, comprising: (a) passing an optical scanner device across a time/amplitude trace of a seismic section to produce a signal for the time/amplitude trace (b) selecting positive components of the signal (c) determining which of the positive components of the signal have been amplitude clipped and rejecting all components of the signal that have been amplitude clipped; and (d) interpolating nonrejecting positive components of the signal to reconstitute the time/amplitude trace.
Claim 10
Independent Claim
77 words
A method of reconstituting a time/amplitude trace, comprising: (a) passing an optical scanner device across a time/amplitude trace of a seismic section to produce a signal for the time/amplitude trace (b) selecting positive components of the signal (c) determining which of the positive components of the signal have been amplitude clipped and rejecting all components of the signal that have been amplitude clipped; and (d) interpolating nonrejecting positive components of the signal to reconstitute the time/amplitude trace.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |