What are the most in demand jobs for international students doing a masters in geology?

I'm planning to do a masters in petroleum geology at the university of Aberdeen. As an international student I was wondering what are the best options for jobs in the industry. I know then biggest companies are shell, exxon, bp and chevron. But I've seen far more jobs for people with a phiisics degree...are there any consulting companies that take geologists? <br><br>What are the best cities to work in?