You Do Need power plug adapter while traveling from Abu Dhabi to Portugal.

Here is Why You Need An Adapter

The outlet and plug type used in Portugal are C and F and in Abu Dhabi is G. This is how they look like.

Abu Dhabi

In Abu Dhabi, outlets of type G are in use.

Type G

Portugal

In Portugal, outlets of type C and F are in use.

Type C

Type F