It is not supported to access the underlying EUL tables directly. The simplest method is to install the EUL Status Workbooks. See the Discoverer Administrators Guide in chapter 19. Oracle supplies the BA and sample workbooks.
Admin guide: https://docs.oracle.com/cd/E28280_01/bi.1111/b32519/eul_status.htm#BIDAG739
Please be aware that statistics are gathered when a User exits the Discoverer session. If your users use the X to "terminate" the window, this is not an exit and no statistics are written.
Premier support for Discoverer 11g ended June 2014. Version 184.108.40.206.0 is the final / terminal release of the Discoverer product. Discoverer is under sustaining support.
Note 1634827.1 - Oracle Business Intelligence Discoverer Statement of Direction - March 2014
Thanks for the information. Our developers are working on replacing Discoverer. So while I appreciate that it makes sense to use an Oracle provided interface when one is available, I mostly wanted to show which users were locked and have not had any reports that they own run in over a year.