US3592286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of seismic prospecting
Assignee: Ireco Inc
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Filing: 1969-09-11
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Granted: 1971-07-13
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Expires: 1989-09-11
Abstract
Abstract A method of seismic prospecting whereby explosive charges are detonated at any desired depth and the bubble-pulse train is permitted to form without hindrance. In a first embodiment of the invention the effects of the bubble are removed in the stage of processing of the recorded seismic data. In a second embodiment, the characteristic pulse train produced by the bubbles is used to enhance the quality of the resulting seismic data.
Inventors
- 👤 Curtis H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:55
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/38; G01V1/393; G01V1/3817
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A method of marine seismic prospecting comprising the steps of: establishing a bubble containing a high-pressure expanding volume of gas at a sufficient depth to prevent the gas from directly venting to the atmosphere; the initial expansion of said gas bubble generating in the water a desired initial acoustic impulse for subsequent reflection from the subbottom strata; said gas bubble subsequent to said initial expansion collapsing and again expanding to create in the water at least a first bubble acoustic impulse which also becomes reflected from said subbottom strata; detecting the reflected signals from said initial impulse and said first impulse to provide a seismic wave train; 24''''; constructing an operator from a characteristic of said first impulse, and operating on said seismic wave train with said operator.
Claim 2
Independent Claim
128 words
A method of marine seismic prospecting comprising the steps of: establishing a bubble containing a high-pressure expanding volume of gas at a sufficient depth to prevent the gas from directly venting to the atmosphere; the initial expansion of said gas bubble generating in the water a desired initial acoustic impulse for subsequent reflection from the subbottom strata; said gas bubble subsequent to said initial expansion collapsing and again expanding to create in the water at least a first bubble acoustic impulse which also becomes reflected from said subbottom strata; detecting the reflected signals from said initial impulse and said first impulse to provide a seismic wave train; 24''''; constructing an operator from a characteristic of said first impulse, and operating on said seismic wave train with said operator.
Claim 3
Dependent Claim
63 words
The method of claim 1 wherein, said gas bubble subsequent to said first impulse undergoes a series of expansions and contractions thereby creating in the water a sequence of bubble impulses forming a bubble pulse train which also becomes reflected from said subbottom strata, and said operator is constructed from a characteristic of at least said first impulse relative to said initial impulse.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein, said operator substantially removes from said wave train the reflected signals from said first bubble impulse.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein, said operator substantially removes from said wave train the reflected signals from said bubble pulse train.
Claim 6
Dependent Claim
31 words
The method of claim 2 wherein, said operator substantially removes from said wave train the reflected signals from said first impulse and from a subsequent bubble impulse in said pulse train.
Claim 7
Dependent Claim
27 words
The method of claim 1 and further including the step of: detecting said initial impulse and at least said first impulse to obtain a bubble pulse traiN.
Claim 8
Dependent Claim
22 words
The method of claim 6 and further including the step of: measuring the time interval between the detected initial and first impulses.
Claim 9
Dependent Claim
47 words
The method of claim 7 wherein, said operator is constructed by using said time interval, and said operating step includes the step of cross correlating said bubble pulse train with said seismic wave train thereby removing the effect of the reflected signals corresponding to said first impulse.
Claim 10
Dependent Claim
41 words
The method of claim 6 wherein, said operator is an inverse operator constructed by inverting said bubble pulse train to a preselected waveform, and said operating step includes the step of inverse filtering said seismic wave train with said inverse operator.
Claim 11
Dependent Claim
32 words
The method of claim 6 wherein, said operating step includes the step of compressing said bubble pulse train into said initial pulse thereby producing the effect of an enhanced single pulse source.
References Cited (Backward Citations)
US3496532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |