You should ask this question to the Nigerian Govt.

Everyone has debt, it's a tool, not a sign of poverty/inability to repay.

The amount of money isn’t really the issue, it’s the infrastructure for getting this revenue back towards public funds. That is to say corruption and a lack of internal organizations probably prevent a good portion of revenue from coming back to the people... And/or that they’ve already obligated themselves to other humanitarian efforts. Oh yeah and don’t forget existing debt obligations which are likely to be many factors larger...

Also, more importantly, you should probably google before shit posting as they roughly make ~$48bn of their GDP from oil.

In 2013, the official in charge of the central bank claimed that $20 billion had disappeared from the state oil company. He provided over 300 pages of evidence to parliament to substantiate this claim, and yet he was blamed for the loss and fired.

Nigeria is a country with a long and persistent history of corruption. It pays its legislators the highest salaries in the world, yet over 60% of Nigerians live in poverty. About 9 months ago, anti-corruption investigators found $43 million in cash in an apartment, which is a drop in the many-hundreds-of-billions that have been lost to corruption in the course of Nigerian history.