A liquefied natural gas (LNG) export project in British Columbia would use roughly 1,000 MW of power, with the actual source of that power still up in the air, said a project report by the developer.
The British Columbia Environmental Assessment Office said Aug. 8 that an application for this project has officially entered the environmental assessment process.
Woodside Energy Holdings Pty Ltd. proposes an LNG export facility at Grassy Point, located near Prince Rupert on British Columbia’s Pacific coast. The company plans to convert processed natural gas, delivered by a third party pipeline, into LNG for export to global markets. The ultimate facility would produce up to 20 million tonnes per annum (Mtpa) of LNG. Product is planned to be exported from the facility to global markets via ships.
The Grassy Point LNG facility is to be constructed and operated in two distinct phases.
- Phase 1 involves the construction of LNG trains, with an LNG capacity of between 6 and 15 Mtpa of LNG, supporting infrastructure including jetties and a materials offloading facility, power generation, water supply, sanitary waste treatment, access roads and workforce accommodation.
- Phase 2 is expected to involve the installation of additional LNG trains and associated supporting infrastructure at the site up to the nominal 20 Mtpa LNG. The capacity of each train is expected to be between 3 and 6.5 Mtpa.
Development options under consideration include an onshore LNG facility and a near-shore facility. Depending on the selected LNG processing option, construction of Phase 1 of the project is expected to take approximately four years.
Woodside Energy Holdings is a wholly owned subsidiary of Woodside Energy Ltd. (WEL) based in Perth in Western Australia. WEL is Australia’s largest producer of LNG.
On-site and off-site power are both possible for this project
“The Project requires a large consistent power supply to support the liquefaction process, associated utilities, and administration complex and workforce accommodation,” said an August 2014 project report that Woodside filed with the British Columbia Environmental Assessment Office. “The estimated power requirement is approximately 1000 MW. Typically worldwide LNG liquefaction plants produce their own energy utilising feed gas and waste gas streams from the facility as fuel gas, this is to ensure the reliability of energy supply for the facility.
“The LNG process typically incorporates gas turbine driven rotating machinery, supported with additional electrical or steam drives. The electrical power could be produced on-site with gas turbine driven generators potentially with additional steam driven generation turbines. There is scope to investigate LNG process designs that utilise process drives that are entirely electrically driven. This opens up the opportunity to consider highly reliable external suppliers for energy supply.
“A decision is yet to be made regarding the proposed power source, whether it is produced by the LNG facility itself, externally supplied or a combination of the two.”
The early estimated capital cost for the Phase 1 of the LNG project is C$10bn–C$15 bn. This includes the construction and commissioning of LNG trains and associated infrastructure with a capacity of between 6 and 15 Mtpa.
Subject to approvals, the preliminary schedule aims for first LNG production and export in 2021. The estimated duration of key project stages are:
- Environmental assessment and engineering design – 2014 to 2017;
- Construction activities – 2017 to 2021;
- Operations and maintenance – 2021 to 2047; and
- Decommissioning and abandonment – sometime after 2047.