ABUJA, Feb 19 (Reuters) - Nigeria's long-delayed oil bill, which could unlock billions of dollars of investment, may never become law, the head of the country's biggest oil company said on Tuesday.

The Petroleum Industry Bill (PIB) being debated in parliament would change everything from tax levels for foreign oil majors to the structure of the state energy company. It has been in the works for five years but government, lawmakers and oil companies can't agree on terms.

'I find it difficult to see how we will end up with a PIB by the end of this year,' Oando Chief Executive Wale Tinubu told an industry conference in Abuja, adding that further delays because of national elections in 2015 could derail the bill completely.

(Reporting by Joe Brock; Editing by David Goodman) Keywords: NIGERIA OIL/LAW

(joe.brock@thomsonreuters.com)(+234 803 400 4222)(Reuters Messaging: joe.brock.thomsonreuters@reuters.net)

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