Marks Marks,
Navigator requires maps to have a locator. So you will need to create a locator for your Mobile Map Package.
Locators provide the Search functionality, and you will likely want this for your Well data.
This can be done using the Geoprocessing tool, Create Address Locator.
Then when you create the Mobile Map Package, include the Locator.
Share the Package and then when you search for it in Navigator, you will see that it appears.
As an extra tip.. If you are already on the search result panel in Navigator, click cancel and go back to your maps view and click the + button to reset the search.
Mark