469 Posts in 230 Topics by 67 members
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Video Tutorials
New YouTube video giving a sneak peak of a new application for trace header maths - available for users in the next beta release : https://www.youtube.com/watch?v=Pw9rrege_6A 1 year ago |
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Third V6-9 beta release - 19 October 2018
On the 19th of October 2018 we completed another release sprint of the development version of GLOBE Claritas (V6-9) and were able to provide a download for the latest beta release to our Linux clients. Some of the new functionality and features in this beta release included:- • GEOMETRY – New option added to crooked line binning for extremely crooked lines, to allow for improved binning fidelity. Each trace has a brute force check to define best fit for the CDP into which it bins - allo... 1 year ago |
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statics
Refraction statics corrects for variation in near surface terrain. On land seismic surveys, we can expect the near surface terrain to vary significantly. In a few meters we might go from soft, marshy ground to a weathered outcrop. This can lead to large, localised velocity variations which distort the seismic travel times. Static shifts to correct for this can be obtained by using a 'replacement velocity'. One approach to estimating this velocity is to model it from the first-arrival picks of a... 1 year ago |
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statics
Do we need to use refraction statics when processing seismic reflection data ?? 1 year ago |
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Apply DATUM_FIX module
Ok, I can send all my flows which lead to my static's workflow with the data. Thank you again. Matthieu. 1 year ago |
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Apply DATUM_FIX module
If you can send your jobflow, support files and a sample of your dataset through to claritas.support@gns.cri.nz we can try to take a look and see what the issue might be. 1 year ago |
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Apply DATUM_FIX module
I want to use both refraction's corrections from the refstat's workflow and the elevation's correction to a fix datum. I use STATIC module only for the the *.shf file output from refstat's workflow, but I also want to apply elevation's corrections for total static corrections. I know that I must use the DATUM_FIX module for elevation's corrections, but I don't see any differencies whether I use or not the module in my flow, because the total static corrections in my traces show no change,... 1 year ago |
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Apply DATUM_FIX module
Shifting to a floating datum and/or fixed seismic reference datum helps to correct for the effect of topography / elevation. Refractions statics (refstat application) on the other hand corrects for variation in near surface terrain. On land seismic surveys, we can expect the near surface terrain to vary significantly. In a few meters we might go from soft, marshy ground to a weathered outcrop. This can lead to large, localised velocity variations which distort the seismic travel times. Is... 1 year ago |
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Apply DATUM_FIX module
My jobflow looks like this : 1 - SEISJOB 2 - SEISREAD 3 - ADDGEOM 4 - STATIC 5 - DATUM_FIX 6 - SEISWRITE Only my *.shf file is applied for the static correction, but no elevation correction. However, if I use the command "Datum" and "Vel_datum" in the STATIC module, some corrections are applied to my data. 1 year ago |
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Apply DATUM_FIX module
What does your jobflow look like, could you attach it? The *.shf file output from the refstat application can be applied to data via the STATIC module. The DATUM_FLT - DATUM_SRD pairing of modules allows correction from acquisition datum to floating datum (a smoothed version of the topography) {DATUM_FLT] followed later by correction from floating datum to fixed seismic reference datum (SRD) [DATUM_SRD]. The DATUM_FLT module is normally applied at the start of the overall processing sequen... 1 year ago |
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