Managing regional data

In some scenarios where certain data is unavailable or unclear it may be necessary to use regional data for some of your calculations. The Regional Data form (Prepare > Wells > Log Tools > Regional Data) and the associated Regional Data View allow you to define and work with regional, TVDSS based data sets, called TVDSS property tables. These tables are well independent and do not have an MD reference, unlike logs, which are always associated with a well. Instead, TVDSS property tables can be applied to any well and can also be converted to logs that can then be used throughout the workflow.

While most of the work related to the creation of these TVDSS property tables occurs in the Regional Data View, the Regional Data form contains functionality for converting logs to TVDSS property tables and vice versa, allowing you to leverage existing data. Additional functionality for extending the wellbore based on a TVDSS property table is available as well to ensure that the regional data is properly visualized alongside the well.

Converting data

Convert log to Regional Data

Using the Regional Data form, any log can be converted to a TVDSS property table and then reviewed and edited in the Regional Data View.

Converting a log to a Regional Data (TVDSS property table)

  1. From the drop-down list, select the well from which you want to select logs for conversion.

  2. From the list of available logs select the logs to convert.
  3. Click Convert. The log appears in the regional data table below, and can be further reviewed and interacted with in the Regional Data View.
  4. Click Show to open the Regional Data View.

Convert Regional Data to log

Likewise, a TVDSS property table can easily be converted to log data for additional use in the workflow.

Logs that have been created from TVDSS property tables behave differently from normal logs in the fact that they are dependent upon the TVDSS property table from which they were generated. If the TVDSS property table is updated, the converted log will automatically update. Converted logs are dependent logs and cannot be directly edited. Instead, they can only be updated as the source TVDSS property table updates. For instance, if a regional overburden stress model or a representative density profile exists, it can be used to create regional overburden stress logs for any well in the region. Once these stress logs have been created, you may simply update the TVDSS property table for the regional overburden and all the linked regional overburden stress logs will be updated.

Converting Regional Data (TVDSS property table) to a log

    Tables

  1. From the list of available Tables which can be converted, select the tables to convert to a log.
  2. Check the box for each of the wellbores that you want the new log to be mapped to.
  3. Click Convert.

    4. Wellbores

  4. The log is created and stored under the selected wellbore(s) in the JewelExplorer.

Vertical and horizontal wellbore extension

In some cases, such as when working with real-time updates, the depth of the regional data extends deeper than that of the wellbore. To properly visualize your regional data alongside the well in such a situation, you can choose to extend the wellbore based on a selected TVDSS property table. For highly deviated or horizontal wellbores there is an additional option that allows you to specify the extension depth.

Vertical extension of the wellbore

  1. Select the TVDSS property table for conversion and the target well for the converted log.
  2. In the Wellbore extension section, check the box for Use maximum TVDSS from Regional Data.
  3. Click Convert to create a log from the regional data and extend the wellbore as you specified. A message in the Output Information pane appears to confirm that the selected wellbore has been extended.

Highly deviated or horizontal extension

  1. Select the TVDSS property table for conversion and the target well for the converted log.
  2. In the Wellbore extension section, check the box for Use maximum TVDSS from Regional Data.
  3. If the wellbore is deviated check For high deviated wellbore use horizontal extension and specify the distance you would like to extend.
  4. Click Convert to create a log from the regional data and extend the wellbore as you specified. A message in the Output Information pane appears to confirm that the selected wellbore has been extended.