420 Posts in 208 Topics by 63 members
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SV window in 6.1
The SV application isn't able to extrapolate back to 0m offset on the displayed data. However, you could try using the OFFREG module to extrapolate the data back to 0 offset then display this regularised data in SV. 4 years ago |
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SV window in 6.1
thanks for your help 4 years ago |
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Positive and negative offset
I have a seismic line with spread-spread deployment, and I need to stack the data with a specific range of offset. In the STACK module, I can only stack with either positive or negative offset. May I know how to stack the data with both of the positive and negative offset at the same time? Thanks a lot. 3 years ago |
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Positive and negative offset
If you're wanting to include 0 offset, eg. stacking offsets -2000 to 2000, then you should be able to use the RESTRICT and RESRANGE parameters in the STACK module. If however the 0 offset is not included, say you want to stack offsets -2000 to -1000 with offsets 1000 to 2000, then you could try something like the following: use the HDRMATH module to store the absolute offsets in another header, eg.SPARE1=abs(OFFSET) use a IFNOT loop with TREMOVE to remove all traces outside the required absol... 3 years ago |
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...export seismic data
Hello there, I was trying to find a way to export my seismic line (.segy or even better .dsc) into a simple triplet xyz (offset, time, amplitude) that can be easily manipulated with, for example, Python or GMT. I came across a question on this forum where a user shared a python code to plot some seismic data with matplotlib. However, the link is a bit old and does not work anymore. Any suggestion? Or anywhere I can find a sort of repository of Python codes to be run through Claritas? 3 years ago |
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...export seismic data
Within GLOBE Claritas you can make use of the RUNPYTHON module to run your own Python code within the software. The WRITEGRID module can be used to write out a portion of seismic data to a MatLab or NetCDF format output file. You can specify a range of traces to write (using KEYNAME and KEYRANGE) and/or a time-window (using TRANGE). The output formats for this module include: SEGY: A simple SEG-Y file using the Claritas grid-io functions NetCDF: A NetCDF binary grid file GMT: A GMT-form... 3 years ago |
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...export seismic data
Great answer, many thanks for that! I should have looked more into Globe Clartias first, my bad! The writegrid process module is fantastic and with a GMT option, big thumb up! Much appreciated. I'm still converting the GMT grid to xyz though, if anybody is interested in having an ASCII file out of it and then plotting it with pswiggle - but this is not Claritas anymore. Cheers. 3 years ago |
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STACK
I have a question, I did a migration and a stack with the same gather but when I want to display them the stack does not have all crosslines and the migration yes, in some inlines the stack even I can't see nothing, I attach one comparative display and the job imagen to you help me, I don't understand why missing crosslines in the stack? thanks 3 years ago |
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STACK
It sounds like when the data was binned not all CDPs had data falling into them. The migration has migrated/spread/smiled data out into these empty bins. If you review the fold maps you should see the low/no fold CDPs/crosslines. 3 years ago |
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STACK
maybe that problem is in the geometry then? or in the CDP sort? 3 years ago |
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