Bayesian Wavelet Extraction
The Bayesian Wavelet Extractor only runs on Linux. Attempting to run it on Windows will produce an error message (WavX will not run on Windows).
Available in: Delivery module
Create a new wavelet extractor (bayesian)
- In the Control Panel, open the Wavelet tab.
- At the tab header, click the Add icon and select New Wavelet Extractor (Bayesian).
- Type a name for the process and click OK. The new process item will be available in the Wavelet tree.
- In the Details Panel of the new Bayesian Wavelet Extractor, click the Add icon beside Angle stacks to select at least one Stack volume and define the Angle of Incidence (°) to be used for the extraction process. All stack angles must be unique.
- Define the Maximum wavelet length (ms) to be applied to all wavelets.
- In the Extraction time window section, type the Start time (ms) and End time (ms) for the extraction.
- If multiple stack volumes are provided, define the mean and standard deviation of the Far wavelet stretch prior distribution and Far wavelet scale prior distribution.
- In the Wells section, click the Add icon to provide at least one well for the extraction process.
- If you have provided any stacks with non-zero angle, you must select all three curves for P Slowness, S Slowness and Density. If you choose one stack with an angle of 0°, the S slowness curve is not required.
- At Well position prior distribution, define the X/Y shift mean and standard deviation for the wells. If multiple wells were selected, click on the Per well check box to define a different X/Y mean and standard deviation for each well.
- Similarly, define the Time shift mean (ms) and standard deviation for the wells. If multiple wells were selected, click on the Per well check box to define a different time shift mean and standard deviation for each well.
- In the Switches section, select the Use a wavelet prior check box if you want the calculations to begin from a selected prior. If a wavelet prior is used, Insight will automatically compute only the longest possible wavelet.
- Specify the percentage of Uncertainty (stddev) for the wavelet prior, and choose whether to apply it to the Max Sample or Each Sample.
- Constrain the wavelet peak arrival time and standard deviation by selecting the Constrain wavelet peak arrival to time +/- stddev (ms) check box. Specify the time and stddev in the boxes below. Hover over a particular box to identify the range of the value that can be inserted.
- To constrain the wavelet peak of a specific sign, tick the Constrain wavelet peak of specified sign to arrival time +/- stddev (ms) check box. Specify the time, stddev and sign in the boxes below. The value of the sign must be 1 or -1.
- Constrain the wavelet phase to an angle with a standard deviation by selecting the Constrain wavelet phase to angle +/- stddev (°) check box. Specify the angle and stddev in the boxes below.
- At Tag to append to results directory name, type a name for the tag to add to the results directory.
Click Run to run the process.
Note: This process only runs on Linux and MacOS X. An error will appear if you try to run it on Windows.
- Once the process completes, a new wavelet item will be available in the Wavelet tree.
- Save the current session and the wavelet will be saved in the project database.