Nigeria is a large country also a very popular country in oil production. Major Nigeria oil producing state areare located in South south region i.e. Niger-delta region of the country. The State’s are ranking as follows Akwa Ibom, Rivers state, Delta state, Bayelsa state, Cross River state etc.
Akwa Ibom: Is currently the largest oil producing areain the country after taking Rivers State’s position. Is populated with over 5 million people according to the last census.
Rivers state: River state was once the largest oil producing state before Akwa Ibom took over. It is populated with over 5 million people according to 2006 census. It is bounded by Atlantic ocean on the south.
Delta State : Is one of the highest producing area and richest state in Nigeria. It is made up of 25 local government areas. Warri is the heart of Delta state and a home of petroleum refineries in the country
Bayelsa State : It is among the oil producing areas with 80% crude oil resources in Nigeria.
Cross River state : It is the fifth oil producing state in the country.
In human development terms, the delta fares somewhat better – poverty rates according to the NBS are said to be lower by half, compared to the rest of Nigeria. Contrary to these findings, over 75% of the people of the delta rate themselves as poor. Despite the oil riches of the delta region, the glaring paradox is that it remains grossly underdeveloped in terms of formal economy, infrastructure and public services. Militancy is just one of the symptoms of the deeply rooted problems in the delta regions. Environmental damage brought about by decades of exploitation; continuous gas flaring, oil spills, illegal refining, oil theft and lenient laws continue to worsen the situation. Multinational oil companies have contributed in part to these hazards. These companies have had to pay compensations to calm volatile reactions from communities and/or penalties albeit at lower rates than international standards.
The agitations of different stakeholders in the Niger Delta have posed a number of pertinent questions around good governance and benefit capture for the oil producing communities. For instance, some communities have claimed that in the past 13 years, their governors have misappropriated over N7.282 trillion received as derivation funds, calling on NEITI and other agencies to intervene in this matter.

https://efefemisblog.com.ng/2019/04/14/oil-producing-states-in-nigeria-which-are-left-backward/