GasTerra said it will seek an arbitration ruling against Eni to recover $1.01billion in back payments it was owed after the Italian oil and gas group lost a price review arbitration.
Militant group the Niger Delta Avengers (NDA) has vowed to start attacking personnel as it continues its fight for oil assets in the West African country.
British oil major BP has approved investment in the first phase of developing the large Atoll gas field offshore Egypt, only 15 months after it first announced its discovery.
Attacks on oil infrastructure will continue at least in the short to medium term, resulting in depressed oil output over much of 2016, according to analysts.
Chariot Oil & Gas has signed a farm-out agreement with Eni for the company to acquire a 40% interest in return for a capped carry on drilling the JP-1 prospect.
Italian oil company Eni aims to save EUR13billion from cost cutting and asset sales as it aims to become a leaner organisation in the new low oil price environment,
The Mozambique government had approved Eni's plan of development (POD) for the Italian oil major's Coral FLNG project, a key step towards a final investment decision.