GB946769A - Improvements in or relating to the production of seismograms - Google Patents
Improvements in or relating to the production of seismogramsInfo
- Publication number
- GB946769A GB946769A GB1159760A GB1159760A GB946769A GB 946769 A GB946769 A GB 946769A GB 1159760 A GB1159760 A GB 1159760A GB 1159760 A GB1159760 A GB 1159760A GB 946769 A GB946769 A GB 946769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layers
- seismogram
- coupled
- water layer
- single water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/50—Corrections or adjustments related to wave propagation
- G01V2210/56—De-ghosting; Reverberation compensation
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
946,769. Geophysical prospecting. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. April 1, 1960 [April 3, 1959], No. 11597/60. Heading H4D. In a method of producing a seismic record substantially free from unwanted signals due to reverberations in subterranean layers, original signals (either from a " live " survey or from an extant seismic record) are combined in predetermined ratios with auxiliary signals which are differently time - displaced original signals. The disclosure includes a mathematical discussion of the effects of reverberation in the cases of a single water layer, a number of " non- coupled " layers, and a number of " coupled " layers, Figs. 1, 2 and 3 (none shown); layers are considered to be " coupled " if when taken together they give rise to reverberations within the bandwidth 5 to 300 c/s. In one embodiment the original signal Go(t) and time-delayedsignals G 0 (t - T1), G 0 (t - 2T 1 ), where T 1 corresponds to twice the depth of a single water layer and may be known, measured or estimated, are combined in an amplitude-doubling amplifier 11 after multiplication by respective factors ¢, r 1 and r 1 <SP>2</SP>/ 2 , where r 1 is an assumed or known reflexion coefficient. It is stated that the output signal G 1 (t) when recorded gives a seismogram substantially free of the effects of reverberation in the single water layer. If r 1 is negative, an inverting circuit 13 is used. In cases where r 1 is not accurately known, the process is repeated for a number of probable values and the most " legible " ensuing seismogram is chosen. Illustrations of recording before and after correction are given, Fig. 5 (not shown). More complicated examples, e.g. for several layers are described, Figs. 6 and 7 (neither shown). Photo-electric interpretation of a variable-area or variabledensity may be employed; delay lines may replace the magnetic reproduction arrangements; and the final " seismogram " may be a series of numerals.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL237757 | 1959-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB946769A true GB946769A (en) | 1964-01-15 |
Family
ID=19751649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1159760A Expired GB946769A (en) | 1959-04-03 | 1960-04-01 | Improvements in or relating to the production of seismograms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB946769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299381A (en) * | 2023-05-19 | 2023-06-23 | 中国海洋大学 | Deep sea reverberation quick forecasting method and system for superposition of seabed mountain clutter coupling effect |
-
1960
- 1960-04-01 GB GB1159760A patent/GB946769A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299381A (en) * | 2023-05-19 | 2023-06-23 | 中国海洋大学 | Deep sea reverberation quick forecasting method and system for superposition of seabed mountain clutter coupling effect |
| CN116299381B (en) * | 2023-05-19 | 2023-08-15 | 中国海洋大学 | Deep sea reverberation quick forecasting method and system for superposition of seabed mountain clutter coupling effect |
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