[8] The official foundation stone for Qatargas 1 was laid in 1994 and in 1995 another major contract with the Korea Gas Corporation (KOGAS) was signed, guaranteeing the supply of 2.4 million tonnes of LNG per year.

The first shipment of LNG was loaded and delivered to Japan in 1996 and Spain (Enagás) in 1997 from Ras Laffan Industrial City's port.

Another Head of Agreement between QatarEnergy and RL (II) to supply 15.6 Mta of LNG to the USA was signed in 2003.

[21] Ras Laffan Helium 1 reached its full production capacity in 2008 and the first LNG shipment to the west coast of North America was completed.

[25] Following the international economic crisis and the downturn of gas and oil prices in 2008, Qatargas temporarily had to declare force majeure in January 2009 on production of three LNG trains.

[27] In December 2010, Qatar celebrated achieving the national goal of 77 million tonnes per year for the first time, making it the world's largest LNG producer.

[29][30][31] Whilst the company initially aimed at European customers and the United States, the increasing production from North America made it necessary focus on Asian markets,[29][30][31][32] with Japan currently importing around 15% of its total gas consumption from Qatargas, and China, India and South Korea being other major customers.

Qatargas agreed to deliver the LNG to Canaport using both Q-Flex and Q-Max vessels, each holding the equivalent of approximately 5.6 and 4.6 billion cubic feet of natural gas, respectively.

[36][37] Further major deliveries were made to Dubai and France and in 2010 further talks with the United Kingdom were initiated and a Heads on Agreement was signed.

In June 2011 Qatargas then signed a three-year LNG deal with Centrica (UK), valued at around $3.24 billion at the time.

[45][46] Qatargas also signed a long-term agreement in 2011 for over 1 million tonnes per year with Malaysia's Petronas, expiring in 2018, which has since been extended until December 2023.

The DHT is able to process 54,000 barrels (8,600 m3) per stream day of ultra-low-sulfur diesel fuel and was operated at 50% capacity until the Laffan Refinery 2 began production in 2016.

[54][55] The first ship-to-ship transfer (STS) of LNG, following an incident with one of Qatargas' leased vessels in the straights of Singapore, was carried out in 2014.

[56][57] Also, in 2014, Qatargas announced the successful start-up of the Jetty Boil-off Gas Recovery Project, which aimed to reduce flaring at the Ras Laffan LNG loading berths and was inaugurated in 2015.

[62] It aimed to "[…] create a truly unique global energy operator in terms of size, service and reliability" and to "[…] confirm and restrengthen QatarEnergy's superiority in the LNG business [by] reducing operating costs", stated the QatarEnergy's president and CEO Saad al-Kaabi.

[65] Al-Kaabi gave a press conference on 4 January 2018,[45] stating that the new company would save around $550 million in operating costs per year.

[69] In August 2021, Qatargas announced the completion of the WHP12N platform jacket for the North Field Production Sustainability (NFPS) project.

[73][74] In November 2021, a project to build carbon dioxide sequestration facilities at Ras Laffan was announced and would be led by Qatargas along with Axens.

[76] In January 2022, the Laffan Refinery was visited by a team from ExxonMobil Qatar and presented the facility with an award for outstanding safety performance, with has gone seven years without an injury.

[78][79] Qatargas made deals with Bangladesh in March 2022 to begin supplying LNG again during the summer while reducing the winter deliveries.

[80] In June 2023, Qatargas completed the pre-qualification list for the major contract for all necessary engineering, procurement, construction and installation (EPCI) requirements for the compression facilities of its North Field Production Sustainability (NFPS) project.

[94] QatarEnergy LNG's offshore operations are located approximately 80 kilometres (50 mi) northeast of Qatar's mainland on the North Field.

Processed gas is transferred to shore with the associated condensate via a single 32 inches (810 mm) subsea pipeline.

[95] At present QatarEnergy is spending almost $30bn in expanding its North Field, to raise its annual production capacity from 77m tonnes of LNG to 110m by 2025.

[98] Since 2007 QatarEnergy LNG has relocated over 7,500 live corals from nearshore pipelines to protected offshore areas.