Western Australia's near-term gas supply rises: Aemo

The short term supply outlook for Western Australia's (WA) gas market has improved, but gaps in the next decade need to be addressed, according to an Aemo annual report.

The near-term gas supply is stronger than last year's outlook, with supply now forecast to exceed consumption through to 2027 on increased flows from LNG projects and declining near-term consumption, according to the 2024 Western Australia Gas Statement of Opportunities (GSOO) paper from the Australian Energy Market Operator (Aemo).

Ample gas supply is expected because of increased flows from Wheatstone and Pluto LNG projects and new supply including forecast volumes from 2026 onwards from Woodside's Scarborough project and Strike's 87 TJ/d (2.3mn m³/d) West Erregulla plant. But demand is weak on the back of the shutdown of several nickel mines for maintenance in 2024 and the closure of the 2.2mn t/yr Kwinana alumina refinery announced in January.

Aemo's 10-year outlook to 2035 now forecasts surplus gas until 2028, when some gas users will reopen projects. It also forecasts a less steep shortfall in the 2030s, with 2033 supply now 13pc below demand, down from the 27pc decrease in the 2023 GSOO.

New gas supply will still be needed as WA plans to close its state-owned fleet of coal-fired power stations, but increasing renewable generation will shift gas usage in the power grid to a firming capacity, with gas-fired power demand tipped to increase in the early 2030s but stabilise at present levels of about 190 TJ/d by 2040.

But uncertainty remains about the future of coal in the WA grid. The 416MW Bluewaters coal-fired plant, owned by Japanese firms Kansai Electric and Sumitomo, is expected to retire by 2030-31 but may be forced to close earlier because its supplier, the 2mn t/yr Griffin coal mine, cannot guarantee deliveries beyond October 2026. This will increase gas demand.

The WA state government reversed a blanket ban on exporting onshore gas as LNG in September after a parliamentary inquiry into the state's domestic gas policy prompted by concerns from major gas users such as fertilizer manufacturers and metals refiners. Developers are now permitted to export 20pc of production as LNG until 2031 to boost upstream investment in the prospective Perth basin.

By Tom Major