Instead of involving administrators you can invoke OBIEE logging only for the report to be analyzed. In analysis editor (Oracle BI Answers) go to Advanced tab. Within section Advanced SQL Clauses enter into Prefix field:
SET VARIABLE LOGLEVEL=2;
Here you go! Oracle BI now creates detail log entries. When finished just don't forget to remove the prefix again.
Interested in some more end user topics? Check out Oracle BI useful things.