UPDATE 1-Exxon declares force majeure on Nigeria Qua Iboe oil

ABUJA, Feb 7 (Reuters) - Exxon Mobil on Thursday declared force majeure on Nigeria's benchmark Qua Iboe crude oil exports due to pipeline repair work, the company's local unit said, cutting output from Africa's top producer. Nigeria is among the world's top 10 crude exporters and usually ships around 2 million barrels per day, supplying the United States, China and India with its light oil. Qua Iboe is Nigeria's largest crude oil stream with exports, before this announcement, expected to