TRAINS 3, 4 AND 5 EACH HAVE A CAPACITY OF 4.7 MTA REPRESENTING A
PER-TRAIN INCREASE OF 40 PERCENT OVER TRAINS 1 AND 2.
In February 2004, RasGas Train 3 began exporting LNG to India. Train 3 was built to fulfil the major part of the agreement with India’s Petronet LNG to supply 5 Mta of LNG for a period of 25 years. The following year, in August 2005, RasGas commissioned Train 4 to fulfil its European sales commitments. The inauguration of RasGas Train 5 in March 2007 took Qatar’s LNG production capacity to 20.7 Mta and firmly placed Qatar at the top of the list of global LNG producers. The LNG from Train 5 is largely exported to RasGas’ growing portfolio of customers in Europe. Trains 3, 4 and 5 each have a capacity of 4.7 Mta, representing a per-train increase of 40 percent over Trains 1 and 2. Together the three trains form part of the first RasGas expansion project, known as RGX, and individually each marks a number of major technological and commercial milestones.
Several technological firsts helped Train 3 to become one of the most optimised LNG trains ever built. These include helper motors to boost performance of turbo-compressors, reconfigured refrigerant compressors, new gas-treating technology and the use of a hydraulic turbine. Train 3 offshore facilities also marked the switch from a dry-gas (gas and condensate) to a wet-gas (gas, condensate and water) scheme, eliminating the need for process platforms and thereby reducing project costs.
Train 3, 4 and 5 are fed by 9 5/8-inch optimised big-bore wells, which have enabled single-wellhead platform production capacities to increase from 800 million standard cubic feet per day (Mmscfd) to 1,200 Mmscfd. Train 4 was the first LNG train developed with concurrent acid-gas injection facilities to address environmental concerns and reduce sulphur production; it is also equipped for NGL (natural gas liquids) extraction.
Train 5 was completed more than three months ahead of schedule, and with a stellar safety performance. A unique and continuous learning process underpinned this remarkable achievement, which ensured that lessons learned during the construction of Trains 3 and 4 contributed to the success of Train 5. The benefits of this learning process were reflected in the amount of time taken to construct the trains. Trains 3 and 4 each took 33 months, an impressive feat by industry standards at the time. Mechanical completion of Train 5, however, was achieved in less than 28 months.
Trains 3, 4 and 5 represent one of the largest and most innovative LNG projects ever completed – and set the pace for the development of RasGas’ two 'mega-trains': Trains 6 and 7.
The inauguration of RasGas Train 5 in March 2007 firmly placed Qatar at the top of the list of global LNG producers