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- #Amplitude spectrum hampson russell full#
- #Amplitude spectrum hampson russell software#
- #Amplitude spectrum hampson russell Pc#
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#Amplitude spectrum hampson russell software#
A synthetic wedge model and the results of spectral decomposition are described in the following slides. Hampson-Russell Software Services Ltd, Grove House, 551 London Road. Like most geophysical imaging tools, care must be taken in the interpretation of the results.
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Viewing the frequency slices and interpreting the results as zone thickness can be misleading due to wavelet effects. Having a high sampling rate may improve the situation but simply resampling the data will not add any new information. On the other hand, a long window may be contaminated by the response from the underlying and overlying events of the zone of interest. See the complete profile on LinkedIn and discover Dong’s connections. Using a longer window will provide better resolution in the frequency domain. View Dong Liu’s profile on LinkedIn, the world’s largest professional community. There is a trade-off between the length of the data window and the spectral resolution.
#Amplitude spectrum hampson russell Pc#
The time to process 800 traces with a 63 ms window on my 1 GHz PC was 6 minutes. 16 Hz phase mapġ9 Drawbacks of the Spectral Decomposition method Trace Maths scripts are slower to run than compiled code. (single trace showing amplitude spectrum) (from the File > Export Trace option)ġ8 By using a similar process with the DFT_Hphase.prs Trace Maths script, you can create maps of the phase angle for the appropriate frequencies. The amplitude spectrum is placed starting at the output time of 300 ms, which corresponds to the start of the dataset. My first sample point will correspond to 0 Hz and my 16th data point will correspond to 250 Hz. For a 63 ms window, this corresponds to a frequency resolution of ( 1/0.063 = ) 16 Hz. In my case, my dataset has a 2 ms sampling rate which corresponds to a Nyquist of 250 Hz (= 1/(2*0.002) ). from the poststackseismic using the Hampson-Russell commercial software. The frequency resolution is given by the inverse of the time window. lyThe determination of the phase spectrum of a seismic wavelet is as important. Dft_hamp.prsĩ You ll also need to know something about the DFT and the script The Trace Maths script will plot the amplitude spectrum starting from 0 Hz up to the positive Nyquist frequency. Click on the icon below to copy and paste the DFT Trace Maths script to your system.
#Amplitude spectrum hampson russell full#
This iterative method combines full wavelet amplitude and phase spectrum. The spectrum will be output starting from 300 ms. Seismic Interpretation knowing the phase Synthetic Modeling - properly. In this case, I m starting at the Lower_Mannville horizon and using a 63 ms window. You will have to edit the start time (t1 = ), the window length (wlen = ) and the output time. I am going to calculate the spectra over a 63 ms window in this example.Ĩ Copy and paste the DFT_Hamp.prs Trace Maths script into the Trace Maths window. An operator is then constructed which converts the minimum phase wavelet to the zero-phase wavelet and this operator is then applied to the seismic data. 7 Call the output volume something meaningful. The average autocorrelation of the window is taken and used to define a minimum phase and zero-phase wavelet which have the same amplitude spectrum as the input data.