Loading...
Please wait, while we are loading the content...
Similar Documents
Coherent noise attenuation of shallow buried array seismic data
| Content Provider | Semantic Scholar |
|---|---|
| Author | Calderón-Macías, Carlos |
| Copyright Year | 2014 |
| Abstract | A type of noise that is commonly observed in buried vertical array receivers corresponds to near surface low frequency noise that is coherent across the array. A characteristic of the noise that makes it problematic for filtering methods is the overlap between signal and noise in frequency content and propagating dip. A priori knowledge of the overburden velocity and the approximate location and target depth are useful information for separating microseismic events from coherent noise. In the proposed noise attenuation approach filters are designed targeting the frequency of the noise and nearly horizontal propagation. Semblance of the coherent noise across the array for a selected frequency band and an attribute that is proportional to the propagation dip are used to provide a region for application of the filters and for weighting the predicted noise before subtraction. The method is exemplified with a dataset that was acquired to test buried array sensors with sources of various strengths fired in a borehole at a distance from the arrays. |
| Starting Page | 4305 |
| Ending Page | 4309 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1190/segam2014-1643.1 |
| Alternate Webpage(s) | https://www.iongeo.com/content/documents/Resource%20Center/Technical%20Papers/TP_SEG_Coherent_Noise_Attenuation_Shallow_Buried_Array_Data_141024.pdf |
| Alternate Webpage(s) | http://www.iongeo.com/content/documents/Resource%20Center/Technical%20Papers/TP_SEG_Coherent_Noise_Attenuation_Shallow_Buried_Array_Data_141024.pdf |
| Alternate Webpage(s) | https://doi.org/10.1190/segam2014-1643.1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
