This has resulted in about 180 MMCFD to 250 MMCFD of cheap indigenous gas at $4 per Million British Thermal Unit (MMBTU) from not being injected into the system and thus paving the path for exceedingly expensive imported $25 MMBTU Liquefied Natural Gas (LNG) which will cause a yearly loss of about $2 billion per annum to the national exchequer, said sources. They added that all the major E&P companies have left the country including BP, Premier, OMV, BHP, Exxon and recently the under-process Italians – ENI ostensibly owing to excessive litigation and large number of court cases, delayed extension to expired leases etc. "There are currently about 62 cases pending with different courts against various E&P companies who had been operating in the country," said sources, adding that the courts in their initial judgement had passed against the MoE and granted stay orders in favour of the companies in most of the cases.