March 22 (Reuters) - Comments from fourth quarter results conference call:
* Petrobras exploration head says exploration results in Libra subsalt area, offshore Brazil, are "absolutely magnificent"
* Petrobras exploration head says long duration well tests to start in Libra subsalt area at beginning of 2017
* Petrobras says problems at platform in Parque das Baleias offshore field have been fixed, production now operating at full capacity
* Petrobras exploration chief says production declines in offshore Campos basin have been brought under control Main results story: Further company coverage: (Reporting by Jeb Blount)