| Autor: |
John Sallas, Forest Lin, Alexandre Egreteau, John Gibson, Peter Maxwell, Guido Baeten |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
SEG Technical Program Expanded Abstracts 2010. |
| DOI: |
10.1190/1.3513020 |
| Popis: |
Pseudorandom sweeps have very desirable correlation properties that make them promising candidates for use in simultaneous sourcing. Such sweeps are also attractive for generating low frequencies that are more regularly being sought by the industry. Recently there has been considerable interest in acquiring seismic data sets with good low frequency content. Typically a 30-dB/octave barrier must be overcome to recover useful low frequency energy. Low-dwell nonlinear sweeps compatible with vibrator mechanical constraints have been recently introduced as one way to address the challenges of low frequency, but special pseudorandom sweeps provide another viable option. Pseudorandom sweeps reduce the peak demands on the vibrator and can become more effective as the start frequency for the sweep is lowered. Analysis of field test data show that frequencies as low as 2 Hz can be recovered with useable signal-to-noise at reasonable fold. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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