The reference also stated that the national exchequer will suffer a loss of Rs 47 billion by 2029 due to the contract.
Former Pakistan State Oil (PSO) managing director Sheikh Imranul Haq, former Ogra chairman Saeed Ahmed Khan, Ogra chairperson Uzma Adil Khan, chairman of the Engro group Hussain Dawood, former chairman of Port Qasim Authority (PQA) Agha Jan Akhtar, former member of Ogra Aamir Naseem and former PSO Managing Director Shahid M Islam and Abdul Sammad have been named in the reference.
Abbasi was arrested by the NAB on July 18 in connection with the case, in which he and others are accused of illegally awarding LNG terminal contracts for a period of 15 years to a company of their liking in violation of defined rules, incurring losses to the state exchequer.
While Abbasi and Ismail have been in prison for over four months, Haq secured pre-arrest bail last week from the Islamabad High Court.
In April, the Pakistan government had imposed a travel ban on Abbasi, Ismail and five others in connection with the case.
Abbasi served as the prime minister from August 2017 to May 2018, following the disqualification of Nawaz Sharif from office by the Pakistan Supreme Court over the Panama Papers scandal.