HOUSTON, May 7 (Reuters) - Nigeria could produce 6 million barrels of oil per day with adequate investment in its energy sector, the nation's oil minister said on Tuesday.

Heineken Lokpobiri also said in a presentation at the Offshore Technology Conference that African nations must give priority to producing their own oil and gas reserves. COP climate summit's pledges of funding to mitigate warming "will never come," he told attendees.

The US is the largest oil and gas producer in the world, but is asking Africa to stop exploring and producing oil, Lokpobiri said. (Reporting by Curtis Williams)