The real life alchemists of the 21st century.
Production engineering is another specialised field within petroleum engineering, focusing on the equipment and processes used to refine the oil into a usable form. Production engineering is used for the daily production of oil; unlike reservoir engineering which has applies long-term views for oil extraction. It is potentially more dangerous due to being located on rigs and near hazards. This job is specifically on-site with some supervision of machinery and staff working in the process.