The company, which has bases in Aberdeen and Montrose, said it is on track to post net profit growth of at least 15% in 2012 and is confident that profits will rise further in 2013.
Chief executive Ayman Asfari said: "We are currently experiencing high levels of bidding activity, particularly in the Middle East, North Africa and the Commonwealth of Independent States. Given this bidding activity and our competitive positioning, we expect to grow group backlog over the coming months."
Much of the work being sought by Petrofac in the Middle East, North Africa and the former Soviet Union is onshore and construction work.
But the company also highlighted high levels of bidding activity on both operations support contracts and offshore capital projects in the UK and Europe. Its backlog, which is a guide to future work, stood at $9.4 billion (£5.9bn) as of September 30, Petrofac said, up from $8.9bn three months earlier.
The company's shares closed down 17p or 1% at 1615p.