US3629801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic exploration in the vicinity of a shore area
Assignee: Texas Instruments Inc
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Filing: 1969-08-28
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Granted: 1971-12-21
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Expires: 1989-08-28
Abstract
Abstract First electrical signals are generated in response to detection in shallow water adjacent a shore area of variations in pressure created by the generation of seismic waves. Second electrical signals are generated at the shore area in response to particle velocity variations created by the seismic waves. The first and second electrical signals are recorded and then phase shifted with respect to one another according to a predetermined optimum time shift function determined by cross-correlation of test signals.
Inventors
- 👤 Erwin C Brede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:45
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/003
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
89 words
A seismic exploration system comprising: a. means for generating seismic waves, b. a first array of seismic receivers located in water adjacent a shore area responsive to variations in a first physical characteristic created by said seismic waves, c. a second array of seismic receivers located on the shore area responsive to variations in a second physical characteristic created by said seismic waves, and d. means for shifting the phases of the output signals relative to each other of said first and second arrays of seismic receivers into alignment.
Claim 2
Dependent Claim
89 words
A seismic exploration system comprising: a. means for generating seismic waves, b. a first array of seismic receivers located in water adjacent a shore area responsive to variations in a first physical characteristic created by said seismic waves, c. a second array of seismic receivers located on the shore area responsive to variations in a second physical characteristic created by said seismic waves, and d. means for shifting the phases of the output signals relative to each other of said first and second arrays of seismic receivers into alignment.
Claim 3
Dependent Claim
19 words
The system of claim 1 wherein said first array comprises pressure geophones and said second array comprises velocity geophones.
Claim 4
Dependent Claim
32 words
The system of claim 1 wherein said first and second arrays are separated by a surf area, said arrays being connected by a length of jumper cable extending through the surf area.
Claim 5
Dependent Claim
30 words
The system of claim 1 and further comprising: means for shifting the phases of the output signals of said first and second arrays according to a predetermined time interval function.
Claim 6
Dependent Claim
59 words
The system of claim 4 and further comprising: means for generating seismic waves at a location between an array of seismic receivers responsive to variations in pressure and between a second array of seismic receivers responsive to velocity variations, and means for cross-correlating the output signals generated by said first and second arrays to determine said time interval function.
Claim 7
Dependent Claim
22 words
The system of claim 1 and further comprising: means for generating seismic waves at locations in the water adjacent the shore area.
Claim 8
Dependent Claim
19 words
The system of claim 6 and further comprising: means for generating seismic waves at locations on the shore area.
Claim 9
Independent Claim
165 words
A system for seismic exploration of a shore area comprising: a. means for generating seismic waves in the vicinity of the shore area, b. test pressure sensitive seismic receivers disposed in water adjacent the shore area for generating electrical signals in response to the seismic waves, c. test velocity sensitive seismic receivers disposed on the shore area for generating electrical signals representative of the seismic waves, d. means for cross-correlating the electrical signals from said test receivers for generation of an optimum time shift function, e. means for generating sequential seismic disturbances at spaced-apart locations in the vicinity of the shore area, f. a field array of pressure sensitive seismic receivers disposed in the water adjacent the shore aRea, g. a field array of velocity sensitive seismic receivers disposed on the shore area, h. means for recording the electrical outputs of said field arrays, and i. means for phase shifting said electrical outputs relative to one another in accordance with said optimum time shift function.
Claim 10
Independent Claim
165 words
A system for seismic exploration of a shore area comprising: a. means for generating seismic waves in the vicinity of the shore area, b. test pressure sensitive seismic receivers disposed in water adjacent the shore area for generating electrical signals in response to the seismic waves, c. test velocity sensitive seismic receivers disposed on the shore area for generating electrical signals representative of the seismic waves, d. means for cross-correlating the electrical signals from said test receivers for generation of an optimum time shift function, e. means for generating sequential seismic disturbances at spaced-apart locations in the vicinity of the shore area, f. a field array of pressure sensitive seismic receivers disposed in the water adjacent the shore aRea, g. a field array of velocity sensitive seismic receivers disposed on the shore area, h. means for recording the electrical outputs of said field arrays, and i. means for phase shifting said electrical outputs relative to one another in accordance with said optimum time shift function.
Claim 11
Dependent Claim
15 words
The system of claim 8 wherein said field arrays are separated by a surf area.
Claim 12
Dependent Claim
26 words
The system of claim 9 wherein said means for generating seismic disturbances at spaced-apart locations comprises: a seismic wave generator source located on a marine vessel.
Claim 13
Dependent Claim
27 words
The system of claim 9 wherein said means for generating seismic disturbances at spaced-apart locations comprises: a seismic wave generator disposed on a vehicle movable over land.
Claim 14
Independent Claim
137 words
A method of seismic exploration comprising: a. generating seismic waves, b. generating first electrical signals in response to variations in pressure created by the generation of said seismic waves, c. generating second electrical signals in response to velocity dependent variations created by said seismic waves, and d. shifting the phases of said first and second electrical signals relative to one another in response to an optimum time shift function to provide a coherent seismic record wherein said optimum time shift function is determined by generating test seismic waves, generating first test electrical signals in response to variations in pressure created by the test seismic waves, generating second test electrical signals in response to variations created by said test seismic waves, and cross-correlating said first and second test electrical signals for generation of said optimum test shift function.
Claim 15
Independent Claim
137 words
A method of seismic exploration comprising: a. generating seismic waves, b. generating first electrical signals in response to variations in pressure created by the generation of said seismic waves, c. generating second electrical signals in response to velocity dependent variations created by said seismic waves, and d. shifting the phases of said first and second electrical signals relative to one another in response to an optimum time shift function to provide a coherent seismic record wherein said optimum time shift function is determined by generating test seismic waves, generating first test electrical signals in response to variations in pressure created by the test seismic waves, generating second test electrical signals in response to variations created by said test seismic waves, and cross-correlating said first and second test electrical signals for generation of said optimum test shift function.
Claim 16
Independent Claim
74 words
A method of seismic exploration in a shore area comprising: a. generating a sequence of seismic waves, b. generating first electrical signals in response to pressure variations created by the generation of said seismic waves in the water adjacent the shore area, c. generating second electrical signals in response to velocity variations caused by said seismic waves in the shore area, and d. time shifting said first and second electrical signals into phase alignment.
Claim 17
Independent Claim
74 words
A method of seismic exploration in a shore area comprising: a. generating a sequence of seismic waves, b. generating first electrical signals in response to pressure variations created by the generation of said seismic waves in the water adjacent the shore area, c. generating second electrical signals in response to velocity variations caused by said seismic waves in the shore area, and d. time shifting said first and second electrical signals into phase alignment.
Claim 18
Dependent Claim
21 words
The method of claim 13 wherein said first and second electrical signals are generated at locations separated by a surf area.
Claim 19
Dependent Claim
31 words
The method of claim 13 wherein said first and second electrical signals are shifted by a time interval which varies in accordance with the depth from which the seismic waves emanate.
Claim 20
Dependent Claim
24 words
The method of claim 13 wherein said first and second electrical signals are time shifted in accordance with a predetermined optimum time shift function.
Claim 21
Dependent Claim
58 words
The method of claim 16 wherein said predetermined optimum time shift function is determined by detecting pressure variations created by the generation of a test seismic wave, detecting velocity variations caused by said test seismic wave, and cross-correlating electrical signals generated in response to said pressure and velocity variations for generation of a varying optimum time shift function.
Claim 22
Independent Claim
107 words
The method of seismic exploration in a shore area comprising: generating seismic impulses at spaced points along a linear traverse in the shallow water adjacent the shore, detecting pressure variations in the water adjacent the shore area which are created by said seismic impulses, detecting velocity variations at locations on the shore area created by said seismic impulses, recording electrical signals generated in response to the detection of said pressure and velocity variations, and shifting the phases of said electrical signals relative to one another in dependence upon an optimum time shift function determined by cross-correlating the outputs of similar pressure variation and velocity variation sensitive receivers.
Claim 23
Independent Claim
107 words
The method of seismic exploration in a shore area comprising: generating seismic impulses at spaced points along a linear traverse in the shallow water adjacent the shore, detecting pressure variations in the water adjacent the shore area which are created by said seismic impulses, detecting velocity variations at locations on the shore area created by said seismic impulses, recording electrical signals generated in response to the detection of said pressure and velocity variations, and shifting the phases of said electrical signals relative to one another in dependence upon an optimum time shift function determined by cross-correlating the outputs of similar pressure variation and velocity variation sensitive receivers.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |