The world oil market should remain well supplied in 2013 and OPEC does not need to trim its oil output, OPEC Secretary-General Abdullah al-Badri said Monday. OPEC output fell in December to its lowest level in more than a year as its top producer, Saudi Arabia, cut back, leaving OPEC production the closest it has yet been to its target of 30 million barrels per day. "There is an improvement in the world economy, but some countries are still facing