Basra is cool regarding security issues, nothing much to do.
If you will be based at the oil company compounds in Zubair or Rumaila , most probably you will be allowed to leave the camp only to go back to the airport accompanied by PSD, same who will pick you up. Otherwise, the golden rule for all over Iraq is to keep a low profile, always have on you a color photocopy of your the first page of your passport and your visa. Have a lovely stay.