The very large crude carrier (VLCC) Millennium has been chartered by NSRP to load up to 270,000 tonnes of crude oil from Kuwait's Mina Al Ahmadi port on Aug. 1 for delivery into Vietnam, according to fixtures reported by multiple shipbrokers including Meiwa International and smartphone application VLCC Fixtures by Tankers International.

NSRP and Kuwait Petroleum Corp did not immediately respond to requests for comment.

The $9 billion refinery was initially scheduled for commercial startup in the third quarter of this year but issues with a mechanical test on some of the refinery's components set back test runs at the plant, according to a notice on a government website.

NSRP told Reuters in May it expects to start commercial operations by the end of December and will receive its first cargo in August.

The 200,000 barrel per day (bpd) plant will process Kuwaiti crude oil to produce liquefied petroleum gases, gasoline, diesel, kerosene and jet fuel, mainly for the domestic markets.

Kuwait Petroleum International and Japan's Idemitsu Kosan  5019.T each own 35.1 percent of NSRP, while PetroVietnam holds a 25.1 percent stake and Mitsui Chemicals  4183.T 4.7 percent.

Vietnam's existing 140,000 bpd Dung Quat refinery meets about 30 percent of domestic demand.