Speaking to London-based news agency Reuters, he said problems gaining approval for an increased budget was to blame for the delay.
We are already two months behind and we dont know when we will get the funds, he said.
The Al-Zour project is part of a plan to overhaul Kuwaits refining sector, slash the sulphur content in its fuels and lift its refining capacity from 930,000 barrels a day (b/d) to 1.4 million b/d by 2020.
It will see a 615,000 b/d refinery constructed on a greenfield site in the Divided Zone, which is shared with Saudi Arabia, and has a long history of delays and setbacks.
Since it was first announced in 2005, the scheme has been tendered three times. It saw contracts awarded on the second occasion, but they were cancelled before construction started by the Supreme Petroleum Council (SPC), a government agencycharged with oversight of the countrys energy sector.