Congo's share of the Lower Congo Basin captures the northern end of the key play fairways that have yielded over 24 billion boe further south in Angola. These include a continuation of the Cretaceous (post-salt) carbonate play in shallow water (Congo's Sendji Formation correlates with Angola's Pinda Formation), and emerging plays in the pre-salt (Cretaceous) and deepwater (Tertiary). The long-standing Sendji play, which accounts for most production, is now mature. Explorers are turning their attention to new plays and have achieved good returns. Recent success has been from the pre-salt, most recently in shallow water (Nene Marine).