Iran's NIOC has opened the pre-qualification process for foreign oil and gas companies to participate in its upstream tenders. Scores will be awarded according to credit rating, scale of production, experience in international projects, and technical capability. Scoring is particularly weighted towards company financial health and technical capability – particularly increasing recovery rates. The biggest players will pre-qualify comfortably. However, it will be important to score high to secure an invitation to bid on the highest profile projects. We believe only five players will be able to bid on all projects. Which companies are best placed to pre-qualify?