The largest oil and natural gas producer in the EU, the United Kingdom retains proven crude oil reserves of around 4 billion barrels and proven natural gas reserves of some 18.8 Tcf as of 2006. Containing the bulk of domestic reserves and an extensive network of subsea pipelines and infrastructure, the UK Continental Shelf (UKCS) is the most active offshore region for the UK's oil and gas sector, and industry giants Shell, ExxonMobil, Chevron and Total all explore and produce there. The third largest global energy company and headquartered in the UK, BP is operator of such major offshore UK producers as the Foinaven and Forties fields.
Chemists specialize in the composition, structure, properties and reactions of substances. Chemistry can be found throughout the industry, whether it is developing drilling fluid to pump down the wellbore or developing catalysts for use in refining. Chemists may analyze data in an office environment, perform experiments in laboratories, or review processes in the field.