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## How can I calculate Pseudo Relief Seismic Display Attribute?

What exactly Pseudo Relief Seismic Display Attribute? How can I calculate it?

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Pseudo Relief seismic is calculated with a pre-defined function in IHS Kingdom version 8.8 and above. It actually calculates the RMS amplitude first and then applies inverse Hilbert transform to it in an analysis window. Pseudo Relief calculation generates more consistent seismic images for much better visual examination of the seismic data. It gives a feeling of looking at outcrops. So, the geologists would really like it very much. It actually makes it a lot easier to pick the faults and to interpret the corresponding reflectors. Pseudo Relief alone is maybe the best 2D seismic attribute for structural interpretation. You can simply follow the below steps to generate Pseudo Relief seismic data:

– Go to Tools> Trace Calculations> Trace Calculator

– Select the survey from the list and assigns a letter to it. Let’s call it “A”

– If you want to limit to a certain zone, define the “subset” on the fly

– Double-click to select “PseudoRelief” from the Functions pull-down menu

– Use the Numeric Pad and the Math Operators provided on the side

– On the formula line, your final input format should look like “PseudoRelief(A,M)”

– “M” defines the vertical analysis window and it has to be a positive integer number. It corresponds to the number of samples within the half-cycle of the wavelet at the target zone. Let’s use “3” as a start

– Select the output survey, subset and the datatype

– If you didn’t specify a subset above, the pull-down menu will give you the whole seismic data to select

– You will need to add “PseudoRelief” as your new data type when you make this calculation for the first time

– I would suggest using “PseudoRelief-MIG”, “PseudoRelief-PSTM”, etc. to be more descriptive in case you would like to calculate different versions of this attribute for different input data types

– And then Compute

– You may have much better visual display if you choose “Black to White 200” as your color bar

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