Hi
It depend for what purpose you want
you need :
1- 2 photos
2- police clear from ur country embassy
3- Paper from your sponser.
4- then take it to immigration for verivying the signiture.
5- Take to Foreing Affair for attestation, (20 QR ).
6- Finaly take to CEID whic is located after Indutrial Bridge on Salwa Road, after 800 Meter from Salwa petrol Station.

It will take aroud 2 weeks or 1 month