The much awaited access logs is released in the latest patch update https://cloud.oracle.com/en_US/saasreadiness/epm?readinessRID=1385194682102 – Dec 2016
You can now download a daily access log, a Comma Separated Value (CSV) file, which provides detailed information on the resources that users accessed, duration of user activity, the IP addresses from which users connected to the service, and the action that users performed in the service. The access log is generated each day.
To download an Access Log:
Make sure you are login in to the Simplified Interface
Click or tap Application, then Overview, and then Activity.