Crude oil and liquefied natural gas are the main exports of Brunei Darussalam. From January to June 1998 it exported 134.77 trillion BTU or 88.94 percent to Japan and 16.75 trillion BTU or 11.06 percent to the Republic of Korea.

Under a Sale and Purchase Extension Agreement signed by BLNG and the Japanese Buyers in 1993, the LNG Plant at Lumut exports annually about 5.54 million metric tons of LNG to Japan. In June 1998, a further amendment made known as the Sale and Purchase Extension Agreement Amendment had been signed which increased the sales for an additional 14 cargoes per annum to Japan starting from 1999 till the year 2013.

In October 1997, a sale and purchase agreement had been signed to deliver 0.7 million metric tons of LNG to the Republic of Korea until the year 2013. In total, 200 'B' class LNG cargoes equivalent will be delivered annually to the buyers in Japan and the Republic of Korea from the year 1999 to 2013.

In March 1998, the Government of His Majesty the Sultan and Yang Di-Pertuan of Negara Brunei Darussalam formed a Joint-venture company the Brunei Gas Carriers Sendirian Berhad (BGC) with Shell International Gas and Mitsubishi Corporation.

Currently, Brunei LNG Plant processes natural gas supplied from offshore gas fields owned by the Brunei Shell Petroleum Company Sendirian Berhad. From 1st April, 1999 LNG will receive additional natural gas from a non-Brunei Shell owned Maharajalela Jamalulalam Field.

Oil and Gas accounted for about 36% of the country's Gross Domestic Product in 1996.