Nigeria’s crude oil production slipped in December from November as Africa’s top producer continues to struggle to pump to its full OPEC+ output quota amid operational challenges in its upstream sector. Nigeria’s crude oil production fell to 1.422 million barrels per day (bpd) in December, down from 1.436 million bpd in November, according to figures reported by the country’s authorities to OPEC and included in OPEC’s latest Monthly Oil Market Report (MOMR). By Nigeria’s own admission, it failed to…