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.
Document Control involves the storage, access, indexing, retrieval, distribution and deletion of documents within an organization. Security, version control, availability, and audit trails are all considerations that must be made when managing electronic or physical documents. Document controllers typically oversee and facilitate the distribution and security of this information within an organization, and they often use electronic document management systems to do so.