US4594692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic signal generator
Assignee: BP Corp North America Inc
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Filing: 1983-06-27
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Granted: 1986-06-10
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Expires: 2003-06-27
Abstract
Abstract A system for testing seismic signal recording equipment wherein a test signal is generated which simulates the output of at least one seismic sensing device, and, thereafter, the test signal is applied to the seismic signal recording equipment. The test signal is recorded by the seismic signal recording equipment and the recorded signal is compared with the generated test signal to evaluate the performance characteristics of the seismic signal recording equipment. The system can include circuitry to vary component elements of the test signal to test different performance characteristics of the seismic signal recording equipment, as well as ability to generate a random noise signal for addition to the test signal.
Inventors
- 👤 Randol R. Read
- 👤 John W. Supernaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:18
CPC Classifications
G; G01; G01V; G01V13/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A system for testing seismic signal recording equipment stacking and filtering performance characteristics, comprising: (a) signal generating means for generating a test signal which simulates the response of at least one seismic sensing device to an energy impulse imparted into the earth, the test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, and the test signal further comprising a second component representative of random noise which simulates the output of at least one seismic sign sensing device; and (b) circuitry means for applying the test signal to the seismic recording equipment.
Claim 2
Independent Claim
98 words
A system for testing seismic signal recording equipment stacking and filtering performance characteristics, comprising: (a) signal generating means for generating a test signal which simulates the response of at least one seismic sensing device to an energy impulse imparted into the earth, the test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, and the test signal further comprising a second component representative of random noise which simulates the output of at least one seismic sign sensing device; and (b) circuitry means for applying the test signal to the seismic recording equipment.
Claim 3
Dependent Claim
39 words
The system of claim 1 further including signal generating means for generating a test signal, the test signal further comprising a third component representative of burst noise which simulates the output of at least one seismic signal sensing device.
Claim 4
Dependent Claim
16 words
The system of claim 2 further including means for varying elements of the test signal components.
Claim 5
Dependent Claim
94 words
The system of claim 2 further including: (a) means for generating a second test signal which simulates the response of at least one seismic sensing device to an energy impulse imparted into the earth, the second test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, and the second test signal further comprising a second component representative of random noise which simulates the output of at least one seismic signal sensing device; and (b) circuitry means for applying the second test signal to the seismic signal recording equipment.
Claim 6
Independent Claim
98 words
A system for testing seismic signal recording equipment stacking and filtering performance characteristics, comprising: (a) signal generating means for generating a test signal which simulates response to at least one seismic sensing device to an energy impulse imparted into the earth, the test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, and the test signal further comprising a second component representative of burse noise which simulates the output of at least one seismic sign sensing device; and (b) circuitry means for applying the test signal to the seismic signal recording equipment.
Claim 7
Independent Claim
98 words
A system for testing seismic signal recording equipment stacking and filtering performance characteristics, comprising: (a) signal generating means for generating a test signal which simulates response to at least one seismic sensing device to an energy impulse imparted into the earth, the test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, and the test signal further comprising a second component representative of burse noise which simulates the output of at least one seismic sign sensing device; and (b) circuitry means for applying the test signal to the seismic signal recording equipment.
Claim 8
Dependent Claim
39 words
The system of claim 5 further including signal generating means for generating a test signal, the test signal further comprising a third component representative of random noise which simulates the output of at least one seismic signal sensing device.
Claim 9
Dependent Claim
16 words
The system of claim 6 further including means for varying elements of the test signal components.
Claim 10
Independent Claim
111 words
A system for testing seismic signal recording equipment performance characteristics stacking and filtering, comprising: (a) signal generating means for generating a test signal which simulates the response of at least one seismic sensing device to an energy impulse imparted into the earth, the test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, the test signal further comprising a second component representative of random noise, and the test signal further comprising a third component representative of burst noise which simulates the output of at least one seismic signal sensing device; and (b) circuitry means for applying the test signal to the seismic signal recording equipment.
Claim 11
Independent Claim
111 words
A system for testing seismic signal recording equipment performance characteristics stacking and filtering, comprising: (a) signal generating means for generating a test signal which simulates the response of at least one seismic sensing device to an energy impulse imparted into the earth, the test signal comprising a first component representative of a seismic wavelet and the earth's seismic reflectivity, the test signal further comprising a second component representative of random noise, and the test signal further comprising a third component representative of burst noise which simulates the output of at least one seismic signal sensing device; and (b) circuitry means for applying the test signal to the seismic signal recording equipment.
Claim 12
Dependent Claim
16 words
The system of claim 8 further including means for varying elements of the test signal components.
Claim 13
Dependent Claim
65 words
The system of claim 8 wherein the test signal generating means generates an analog test signal according to: ##EQU2## where: S K (t)=the analog test signal on the Kth simulated source initiation; B K (t)=burst noise for the Kth simulated source initiation; R K (t)=random noise for the Kth simulated source initiation; w(t)=a seismic wavelet; and P j =reflection coefficients at time t j .
Claim 14
Dependent Claim
27 words
The system of claim 8 wherein the test signal is adapted to test the performance characteristics of the seismic signal recording equipment including stacking and filtering functions.
Claim 15
Independent Claim
169 words
A method of testing seismic signal recording equipment stacking and filtering performance characteristics, comprising: (a) generating a first test signal which simulates the output of at least one seismic sensing device in response to an energy impulse imparted into the earth, wherein the first test signal comprises a first component representative of a seismic wavelet and the earth's seismic reflectivity and a second component representative of noise which simulates the output of at least one seismic signal sensing device; (b) applying the first test signal to the seismic signal recording equipment; (c) generating a second test signal which simulates the output of at least one seismic sensing device in response to an energy impulse imparted into the earth wherein the second test signal comprises a first component representative of a seismic wavelet and the earth's seismic reflectivity, and a second component representative of noise which simulates the output of at least one seismic signal sensing device; and (d) applying the second test signal to the seismic signal recording equipment.
Claim 16
Independent Claim
169 words
A method of testing seismic signal recording equipment stacking and filtering performance characteristics, comprising: (a) generating a first test signal which simulates the output of at least one seismic sensing device in response to an energy impulse imparted into the earth, wherein the first test signal comprises a first component representative of a seismic wavelet and the earth's seismic reflectivity and a second component representative of noise which simulates the output of at least one seismic signal sensing device; (b) applying the first test signal to the seismic signal recording equipment; (c) generating a second test signal which simulates the output of at least one seismic sensing device in response to an energy impulse imparted into the earth wherein the second test signal comprises a first component representative of a seismic wavelet and the earth's seismic reflectivity, and a second component representative of noise which simulates the output of at least one seismic signal sensing device; and (d) applying the second test signal to the seismic signal recording equipment.
Claim 17
Dependent Claim
34 words
The method of claim 12 further including the step of evaluating the stacking and filtering functions of the seismic signal recording equipment to remove the noise components of the first and second test signals.
Claim 18
Dependent Claim
32 words
The system of claim 1 and including memory access circuitry means for applying a previously generated test signal to the seismic signal recording equipment while a subsequent test signal is being generated.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |