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Synthetic Generation

WinPICS displays synthetics and well logs on the fly from LAS files. This allows you to add, edit and delete panels and well logs.

Before associating a LAS file, assign your Default Synthetic Filter Panels in Project Preferences.
WinPICS requires all curves to be in the same input file.
Check the mnemonic used to define the sonic log in the LAS file to be sure that it is included in your WinPICS Lookup Tables (LUT).
A Batch LAS import is done by selecting multiple well-spots, and multiple input LAS files. Associations will be made automatically if the UWI of the well-spot is defined in the UWI or LOC fields in the LAS files. ( 00/06-35-083-11W6/3 = 00063508311W63 )

Step 1. Associating the LAS Files

These instructions assume you already have a well spot for your synthetic. To annotate log tops in time on your synthetics they can be included in the LAS file, or hand entered.

Follow these steps to associate the LAS files:

From the Application Toolbar select |Well Database. The Well Spot Database dialog box opens.
Highlight the well(s) for which you wish to generate a synthetic.

Click on ASCII Import|Well Logs (LAS)…(If the well does not exist, see Importing Well-spots.)
Browse to your source LAS file(s) (Use the <Shift> or <Ctrl> keys on your keyboard for multiple selections) select the files and click <Open>. WinPICS will automatically cross reference the LAS files to the well-spot(s) based on the UWI within the file. View image

To manually associate the file, select a well spot and click <Make Association>.
Select the correct matching survey record and click <OK>.
Select <OK> once again to continue. The LAS Import Options dialog box opens. View image

Select import options.
Select <OK>to continue with the options selected

Alternative method to make LAS association

You can also use the following method to make an LAS association:

Select Select Well |Well-spot on the Map toolbar.
Click on the well you want to use.
In the Edit Well-spot dialog box, select Logs | Associate LAS.

WinPICS enables you to import LAS files to well spots without a synthetic generated. As a result, your Map view indicates which well spots have a generated synthetic and which ones don't. A well with a synthetic created is surrounded by a rectangle, and a well without a synthetic created is surrounded by a circle.

Circled well symbols can't be selected in a fence or a synthetic window, but you can be select and export them to LogEdit for viewing, editing, and comparison of non-geophysical curves.

To re-associate LAS files to create a correct synthetic file, you must make additions to the appropriate LUT file. If you want to change the LAS file, first delete the association of the LAS files with the well spot, edit the original LAS file, and re-associate that file with the well spot again.

Step 2. Defining the Synthetic Panels

The Define Synthetic Panels dialog box will open. On the left-hand side of the window, the following tracks have been automatically generated from the LAS file.

Velocity Log- Generated as the inverse of the sonic log.
Density Log- Generated from the density log (if available).
RCF Curve- Generated from the velocity and density logs.
Synthetic Filter Panel - Generated from the sonic log (added by default if the filter was assigned in project preferences.) View image

If you have defined your default panels in Project Preferences, they will appear as tracks in the Synthetic Panels list. To add individual logs as tracks continue to step 3.

If no filter panel is displayed in the list, complete the Adding Synthetic Panels section below.

Adding Synthetic Panels

Select the tab for one of the following filters:

Ormsby

Ricker

Butterworth

Klauder

The phase angle allows you to apply a phase correction to the synthetic panel. Enter a value in degrees for the phase angle. The default value 0 implies that no correction is to be applied.
The curve gain factor allows you to apply amplitude scaling to the synthetic panel. Enter a factor for the curve gain. The default value 1 implies no gain will be applied.
Modify the default filter parameters if required.
Click the <<-Add button to add a new synthetic panel track.
To create multiple panels, continue by modifying the filter parameters and clicking <<Add.

You can also define well logs along with the synthetic. To add well logs, continue to step 3.

If you don't need to add logs, select <OK> and continue to step 4.

Step 3. Defining the Well Logs (Optional)

Well logs from the LAS file such as sonic logs can be displayed independently, or along with the synthetic panels. Follow these steps:

Select the LOG tab from the Define Synthetic Panels window. All the logs from the LAS file will appear in the pull down menu next to Log Curve.
Select a log from the list and click <<-Add to generate a new panel track.
Select <OK>to continue.

Step 4. Associate TOPS with Horizons

Well tops names are associated with WinPICS horizon names. When you post or grid data for a horizon, WinPICS makes the well data for associated tops names available. Refer to the section Associate Horizons for a detailed explanation on cross-referencing well tops and horizons.

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