Nigeria's oil dilemma is a "huge risk" to the market

Energy Aspects' chief oil analyst, Amrita Sen, warns that Nigeria's oil dilemma should be top of investors' minds as it is not necessary all about low oil prices: "It is about the geopolitical backdrop, the Niger Delta Avengers and how the government is dealing with them and clearly this is a huge risk to the market," he said. A series of attacks against Nigeria's oil infrastructure has put huge pressure on its overall output, with companies having to evacuate or close their facilities. This warning follows other comments such as Barclays' Miswin Mahesh, who notes that Nigeria's oil problem is "really spooking markets." 

With Nigeria's oil production reportedly hitting a more than 20-year low, one oil analyst tells CNBC why the country's oil dilemma should be at the top of investors' minds.

"I think Nigeria really should be at the top of the agenda, because this is not necessarily about low oil prices," Amrita Sen, chief oil analyst at Energy Aspects, told CNBC Monday.

"It is about the geopolitical backdrop, the Niger Delta Avengers and how the government is dealing with them and clearly this is a huge risk to the market," she added.

A string of attacks against Nigeria's oil infrastructure has put severe pressure on the country's overall output, with companies recently having to evacuate or close their facilities. The group who's claimed responsibility for these attacks is militant group, the Niger Delta Avengers, whose main goal is to "cripple" Nigeria's economy, according to its website.

"(Energy Aspects') latest count of Nigeria is that production is at a million barrels per day. Usually they produce 2.2 (million), so that's a record low and the worst is now there are threats from the unions," Sen added.