US3646509A
Expired / Lapsed
US
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Method for field stacking seismic data and system using write after read bulk data storage
Assignee: Texas Instruments Inc
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Filing: 1969-08-08
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Granted: 1972-02-29
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Expires: 1989-08-08
Abstract
Abstract A seismic digital field stacking method and system in which the first seismic shot of a stack is initiated from a blast command recorded on a conventional magnetic tape which moves past a read head and then past a write head. The seismic response signal is detected and digitalized and temporarily delayed in the buffer of a digital computer for a predetermined number of words, and then recorded on the magnetic tape. After the entire seismic response from the first shot has been recorded on the magnetic tape beginning at a delayed point after the blast command, the tape is rewound. When the blast command again passes the read head, the second shot of the stack is initiated and the tape continues to run. The seismic response from the second shot is again digitalized and temporarily stored in the buffer of the digital computer while the computer performs conventional quality assurance calculations as the tape continues to run. When the first data word is read from the magnetic tape by the read head, it is stored in a transfer register while the computer performs the stacking circulations, taking into account the quality assurance program, and then updates the data word stored in the transfer register. Then as the next data word is read from the tape as it passes the read buffer, the updated word in the transfer register is rewritten on the magnetic tape. The procedure is then repeated to stack the new data from the second shot with the old data from the first shot, and the entire stacking procedure repeated for all successive shots in the stack.
Inventors
- 👤 John M Hughes
- 👤 Stanley E Lehnhardt
- 👤 Byron C Lochridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:44
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V2200/00; G01V2200/10; G01V2200/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
283 words
In a system for field stacking digital seismic data in real time while performing quality assurance processing, the combination of: a. means for collecting digital seismic data in real time, b. magnetic tape storage means for simultaneously reproducing and recording digital seismic data, said magnetic tape storage means including means for writing on and reading from said magnetic tape, transport means for moving the magnetic tape past the read means, a transfer register for temporarily storing a digital word to be written on said magnetic tape, gating means for gating data from said transfer register to the write means to record said data on said magnetic tape and for gating data read from said tape to said transfer register, a second register for receiving and storing the digital data reproduced by said read means, and sequence control means responsive to the word reproduced by said read means for first transferring the word stored by the transfer register to said write means and then transferring the word stored in said second register to said transfer register, and c. digital circuit means including 1. means for temporarily storing a segment of said digital seismic data as it is collected, 2. means for performing quality assurance calculations on the segment of the digital seismic data stored to produce and store stacking factors applicable to said stored data, 3. means for operating the magnetic storage means to reproduce previously stored digital seismic data, 4. means for performing stacking computations to stack the reproduced digital seismic data with the temporarily delayed digital seismic data based on the stored stacking factors, and 5. means for operating said magnetic storage means to simultaneously magnetically record said stacked digital seismic data.
Claim 2
Dependent Claim
283 words
In a system for field stacking digital seismic data in real time while performing quality assurance processing, the combination of: a. means for collecting digital seismic data in real time, b. magnetic tape storage means for simultaneously reproducing and recording digital seismic data, said magnetic tape storage means including means for writing on and reading from said magnetic tape, transport means for moving the magnetic tape past the read means, a transfer register for temporarily storing a digital word to be written on said magnetic tape, gating means for gating data from said transfer register to the write means to record said data on said magnetic tape and for gating data read from said tape to said transfer register, a second register for receiving and storing the digital data reproduced by said read means, and sequence control means responsive to the word reproduced by said read means for first transferring the word stored by the transfer register to said write means and then transferring the word stored in said second register to said transfer register, and c. digital circuit means including 1. means for temporarily storing a segment of said digital seismic data as it is collected, 2. means for performing quality assurance calculations on the segment of the digital seismic data stored to produce and store stacking factors applicable to said stored data, 3. means for operating the magnetic storage means to reproduce previously stored digital seismic data, 4. means for performing stacking computations to stack the reproduced digital seismic data with the temporarily delayed digital seismic data based on the stored stacking factors, and 5. means for operating said magnetic storage means to simultaneously magnetically record said stacked digital seismic data.
Claim 3
Dependent Claim
26 words
means for performing quality assurance calculations on the segment of the digital seismic data stored to produce and store stacking factors applicable to said stored data,
Claim 4
Dependent Claim
26 words
means for performing quality assurance calculations on the segment of the digital seismic data stored to produce and store stacking factors applicable to said stored data,
Claim 5
Dependent Claim
142 words
In a seismic data processing system, the combination of: a magnetic tape, read means for reading digital data words from the magnetic tape, write means for writing digital data words on the magnetic tape, transport means for moving the magnetic tape first past the read means, then past the write means, a first register for receiving a digital data word read from the magnetic tape by the read means, a second register for storing a digital data word to be recorded on the magnetic tape by the write means, and sequence control means responsive to a timing signal reproduced from the magnetic tape by the read means for sequentially transferring the digital data word in the second register to the write means for recordation on the magnetic tape and transferring the digital data word from the first register to the second register.
Claim 6
Dependent Claim
142 words
In a seismic data processing system, the combination of: a magnetic tape, read means for reading digital data words from the magnetic tape, write means for writing digital data words on the magnetic tape, transport means for moving the magnetic tape first past the read means, then past the write means, a first register for receiving a digital data word read from the magnetic tape by the read means, a second register for storing a digital data word to be recorded on the magnetic tape by the write means, and sequence control means responsive to a timing signal reproduced from the magnetic tape by the read means for sequentially transferring the digital data word in the second register to the write means for recordation on the magnetic tape and transferring the digital data word from the first register to the second register.
Claim 7
Dependent Claim
56 words
The combination defined in claim 2 further characterized by: a digital computer having an input buffer and an output buffer, means for transferring a digital data word read from the magnetic tape by the read means to the input buffer, and means for transferring a digital data word form the output buffer to the second register.
Claim 8
Dependent Claim
14 words
means for operating the magnetic storage means to reproduce previously stored digital seismic data,
Claim 9
Dependent Claim
14 words
means for operating the magnetic storage means to reproduce previously stored digital seismic data,
Claim 10
Dependent Claim
26 words
means for performing stacking computations to stack the reproduced digital seismic data with the temporarily delayed digital seismic data based on the stored stacking factors, and
Claim 11
Dependent Claim
26 words
means for performing stacking computations to stack the reproduced digital seismic data with the temporarily delayed digital seismic data based on the stored stacking factors, and
Claim 12
Dependent Claim
53 words
The combination defined in claim 3 wherein: the sequence control means is adapted to enable the transfer of a digital data word from the output buffer to the second register during a period after a data word is transferred to the second register and before the word is Transferred to the write means.
Claim 13
Dependent Claim
115 words
The combination defined in claim 4 further characterized by: means for collecting digital seismic data in real time and supplying the digital seismic data to the computer, and wherein the computer is programmed to delay the received digital seismic data for a period sufficient to process the delayed portion of the data, receive data words in the input buffer as they are reproduced by the read means and generate a data word in the output buffer for updating the data word in the second register based upon the data word received in the input buffer and the processed portion of the real time data whereby the updated data will be stored on the magnetic tape.
Claim 14
Dependent Claim
16 words
means for operating said magnetic storage means to simultaneously magnetically record said stacked digital seismic data.
Claim 15
Dependent Claim
16 words
means for operating said magnetic storage means to simultaneously magnetically record said stacked digital seismic data.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |