US3747056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High resolution reflection shooting with data mixing
Assignee: Texaco Inc
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Filing: 1971-06-16
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Granted: 1973-07-17
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Expires: 1991-06-16
Abstract
Abstract An illustrative embodiment of the invention includes methods for obtaining seismic data from closely spaced subsurface reflection points using a minimal number of seismic energy generations. In the method of the invention the shot point to shot point spacing or the seismometer to seismometer spacing are varied in a systematic manner calculated to produce reflection from close, but not the same, subsurface bed interface areas. The data produced by reflections from the close subsurface bed interface areas may then be combined using data averaging techniques.
Inventors
- 👤 J Treybig
- 👤 E Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:32
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
200 words
A method of obtaining enhanced data in seismic surveying comprising the steps of: locating a line of seismometers in longitudinally spaced relation to each other on or near the surface of the earth; locating a line of shot points for generating seismic energy on or near the surface of the earth in horizontal spaced relation to each other and a given seismometer in such a manner that seismic energy components reflected from subsurface formation by seismic energy generations located at said shot points do not traverse the same subsurface reflection points for each such energy generation, but rather are reflected from different but relatively closely spaced, associated reflection points in said subsurface formations; generating seismic energy at each of the shot point locations; receiving reflected components of seismic energy resulting from each such energy generation at each seismometer location and generating electrical signals representative thereof; recording said representative signals as a function of time to obtain a plurality of seismic data traces representative of data from said different associated reflection points; and processing said seismic data traces by steps including the step of integrating by spatially averaging said data traces corresponding to data from said different but associated reflection points.
Claim 2
Independent Claim
200 words
A method of obtaining enhanced data in seismic surveying comprising the steps of: locating a line of seismometers in longitudinally spaced relation to each other on or near the surface of the earth; locating a line of shot points for generating seismic energy on or near the surface of the earth in horizontal spaced relation to each other and a given seismometer in such a manner that seismic energy components reflected from subsurface formation by seismic energy generations located at said shot points do not traverse the same subsurface reflection points for each such energy generation, but rather are reflected from different but relatively closely spaced, associated reflection points in said subsurface formations; generating seismic energy at each of the shot point locations; receiving reflected components of seismic energy resulting from each such energy generation at each seismometer location and generating electrical signals representative thereof; recording said representative signals as a function of time to obtain a plurality of seismic data traces representative of data from said different associated reflection points; and processing said seismic data traces by steps including the step of integrating by spatially averaging said data traces corresponding to data from said different but associated reflection points.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the step of spatially averaging said data traces is performed by linearly averaging said data traces.
Claim 4
Dependent Claim
44 words
The method of claim 1 wherein the step of spatially averaging said data traces is performed by a weighted averaging wherein traces more distant from the center of an area of associated traces contribute proportionately less to the average than those nearer the center.
Claim 5
Independent Claim
193 words
A method of obtaining enhanced data in seismic surveying comprising the steps of: locating a line of shot points for generating seismic energy in longitudinally spaced relation to each other on or near the surface of the earth; locating a line of seismometers in horizontally spaced relation on or near the surface of the earth in such a manner that seismic energy components reflected from subsurface formations by seismic energy generation located at said shot points do not traverse the same subsurface reflection points for each such energy generation, but rather are reflected from different but relatively closely spaced, associated reflection points in said subsurface formations; generating seismic energy at each of the shot point locations; receiving reflected components of seismic energy resulting from each such energy generation at each seismometer location and generating electrical signals representative thereof; recording said representative signals as a function of time to obtain a plurality of seismic data traces representative of data for said different associated reflection points; and processing said seismic data traces by steps including the step of integrating by spatially averaging said data traces corresponding to data from said different but associated reflection points.
Claim 6
Independent Claim
193 words
A method of obtaining enhanced data in seismic surveying comprising the steps of: locating a line of shot points for generating seismic energy in longitudinally spaced relation to each other on or near the surface of the earth; locating a line of seismometers in horizontally spaced relation on or near the surface of the earth in such a manner that seismic energy components reflected from subsurface formations by seismic energy generation located at said shot points do not traverse the same subsurface reflection points for each such energy generation, but rather are reflected from different but relatively closely spaced, associated reflection points in said subsurface formations; generating seismic energy at each of the shot point locations; receiving reflected components of seismic energy resulting from each such energy generation at each seismometer location and generating electrical signals representative thereof; recording said representative signals as a function of time to obtain a plurality of seismic data traces representative of data for said different associated reflection points; and processing said seismic data traces by steps including the step of integrating by spatially averaging said data traces corresponding to data from said different but associated reflection points.
Claim 7
Dependent Claim
22 words
The method of claim 4 wherein the step of spatially averaging said data traces is performed by linearly averaging said data traces.
Claim 8
Dependent Claim
44 words
The method of claim 4 wherein the step of spatially averaging said data traces is performed by a weighted averaging wherein traces more distant from the center of an area of associated traces contribute proportionately less to the average than those nearer the center.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |