The Department of Petroleum Resources(DPR), Nigeria estimated 1.89 million barrels of petroleum were spilled into the Niger Delta between 1976 and 1996 out of a total of 2.4million barrels spilled in 4,835 incidents.
A United Nations Development Programme(UNDP) report stated that there have been a total of 6,817 oil spills between 1976 and 2001.
The largest individual spills include;
1. A blowout of a Texaco offshore station which in 1980 dumped an estimated 400,000 barrels (64,000m³) of crude oil into the Gulf of Guinea.
2. Royal Dutch Shell’s Forcados Terminal tank failure which produced a spillage estimated at 580,000 barrels (92,000m³).
50% of the spills are caused by pipeline and tanker accidents.
In 2010, Baird reported that between 9million and 13million barrels have been spilled in the Niger Delta since 1958.
A percentage break down of the causes of oil spills is as follows;
👉28% of the spills occur because of sabotage (performed primarily by oil bunkering).
👉21% of the spills occur because of production operations.
👉The remaining 1% of the spills are accounted for by inadequate or non-functional production equipment.
Corrosion of pipelines accounted for a high percentage of oil spills because of the small size of the oil fields in Niger Delta. There is an extensive network of pipelines between the fields, as well as numerous small networks of flow lines- the narrow diameter pipes that carry oil from well heads to flow stations allowing many opportunities for leaks. Pipelines which have an estimate life span of about 15 years are old and susceptible to corrosion.
Many of the pipelines are as old as 20 to 25 years.
Consequences of these spills
Oil spillage had an effect on the mangrove forests, the immense tracts of the mangrove forests which are susceptible to oil were destroyed. An estimated 5-10% of the Nigerian mangrove ecosystems had been wiped out by settlement or oil. The rainforest which previously occupied some 7,400km² of land disappeared as well.
People in affected areas complained about health issues including breathing problems and skin lesions.
On January 30, 2013 a Dutch court ruled that Shell was liable for the pollution of the Niger Delta. In January 2015, Shell agreed to pay $80 million to the Ogoniland community of Bodo for two spills in 2008 after a court case in London.
Cleanup of spills
In 2011, Nigeria commissioned a report from the UN on the impact of oil extraction on the Delta area of Ogoniland. The report found severe soil ground and tap water contamination, destruction of mangroves and that institutional control measures in place both in the oil industry and the Government were not implemented adequately.
The UN concluded that it would take over 30 years to reverse the damage and based on those recommendations in August 2017, Nigeria launched a $1billion cleanup and restoration program.
In January 2019, engines first arrived to begin the cleanup.
On September 30th,2020, the Nigerian Federal Environment Ministry announced that the first phase of the cleanup had been concluded and been handed over to the National Oil Spill Detection and Response Agency(NOSDRA) for scientific analysis.
Source:
Wikipedia (https://www.google.com/url?sa=t&source=web&rct=j&url=https://en.m.wikipedia.org/wiki/Environmental_issues_in_the_Niger_Delta&ved=2ahUKEwixnLfDlqPsAhUNUcAKHYOECvwQFjAUegQIHRAC&usg=AOvVaw0nttPuoSt7zd3uO95BVQ3U)
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.amnesty.org/en/latest/news/2018/03/niger-delta-oil-spills-decoders/&ved=2ahUKEwilp4jyo6PsAhWTT8AKHbfwDzYQFjALegQIARAB&usg=AOvVaw2NAM8L2YBsSjad6XC25j0F
https://t.co/AJ7hbSg0BS?amp=1&s=08