Difference between revisions of "Procesamiento sísmico"
Adelo Vieira (talk | contribs) (→Yilmaz (2001)) |
Adelo Vieira (talk | contribs) (→Convetional Seismic data processing) |
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Puts the data in a format that is understandable by computers (e.g. SEG-Y format, SEG-D format, etc.). | Puts the data in a format that is understandable by computers (e.g. SEG-Y format, SEG-D format, etc.). | ||
|- | |- | ||
| − | | | + | | |
| − | | | + | | Édition |
| + | | Seismic data edition | ||
| + | |||
| + | Searchin for noisy, monofrequency and incorrect polarities traces. | ||
| + | |||
| + | examines seismic data for bad, noisy, and\or monofrequency traces, and deletes them, and also spots any traces with incorrect polarities and corrects them. | ||
| + | |- | ||
| + | | | ||
| + | | Correction de la dispersion géométrique | ||
| + | | Geometrical spreading correction | ||
| + | |||
| + | It is also called amplitude correction. Because the signal becomes weaker as it moves away from its source (i.e. its amplitude decreases with time), amplitude correction is needed to count for this lose, and to make amplitudes stronger. | ||
| + | |- | ||
| + | | | ||
| + | | Géométrie de terrain | ||
| + | | Set-up of field geometry – Geometry QC | ||
| + | |||
| + | Incorporates field geometry with seismic data processing. Coordinates, shot\ receiver locations and spacing must be entered to the system carefully and precisely because processes like CMP sorting, for example, highly depend on this. | ||
| + | |||
| + | http://radexpro.com/scope/qc/ | ||
| + | |- | ||
| | | | ||
| − | | | + | | Corrections statiques |
| − | | | + | | Application of field statics corrections |
| − | + | ||
| − | + | This is needed for land data collected on non-flat areas. It reduces the travel times into a common datum level. The datum could be the sea level or any other local datum. | |
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Revision as of 23:10, 21 February 2016
Convetional Seismic data processing
Yilmaz (2001)
| 1 Pre-processing | Démultiplexage | Demultiplexing: Orders seismic data by seismic trace instead of being ordered by time. Multiplexed recording is still found in older data or in current data shots with old recording instruments. |
| Reformatage | Reformatting (SEG-Y/SEG-D)
Puts the data in a format that is understandable by computers (e.g. SEG-Y format, SEG-D format, etc.). | |
| Édition | Seismic data edition
Searchin for noisy, monofrequency and incorrect polarities traces. examines seismic data for bad, noisy, and\or monofrequency traces, and deletes them, and also spots any traces with incorrect polarities and corrects them. | |
| Correction de la dispersion géométrique | Geometrical spreading correction
It is also called amplitude correction. Because the signal becomes weaker as it moves away from its source (i.e. its amplitude decreases with time), amplitude correction is needed to count for this lose, and to make amplitudes stronger. | |
| Géométrie de terrain | Set-up of field geometry – Geometry QC
Incorporates field geometry with seismic data processing. Coordinates, shot\ receiver locations and spacing must be entered to the system carefully and precisely because processes like CMP sorting, for example, highly depend on this. | |
| Corrections statiques | Application of field statics corrections
This is needed for land data collected on non-flat areas. It reduces the travel times into a common datum level. The datum could be the sea level or any other local datum. |
