SINGAPORE (Reuters) - Nigeria risks losing a third of its oil output by 2015 unless it finds ways to boost investment in joint ventures with foreign energy companies, the Financial Times reported, citing an internal report by President Umaru Yar'Adua's energy advisers.

The progess report highlights the government's need to find ways to finance the oil industry in the country, the FT said.

The report says funding shortfalls "portend a grave danger not just to the reform process, but to the continued well-being of the industry as a whole", adding that even if funding levels are maintained "total oil and gas production will decline by 30 per cent from its current level by 2015", according to the newspaper.