The author has recently purchased stock in Gulf Keystone Petroleum and Petroceltic whose company presentational materials provide the backbone of this post. Readers need to be aware that information contained in corporate presentations is not necessarily reliable, although companies listed on the London Stock Exchange are regulated and need to be cautious about what they say. For example, Gulf Keystone's reports on reserves on the Shaikan Field have been audited independently by oil and gas field auditors Ryder Scott and Dynamic Global Advisors.