Western Australia Geothermal Project Portfolio

 Allasso Energy holds three strategically located geothermal projects across Western Australia’s Pilbara, Ashburton and Gascoyne regions. Each project combines evidence of elevated subsurface temperatures with proximity to industrial demand, infrastructure and emerging digital-energy markets. that save our clients money and help protect the environment.

Located in the high-demand Pilbara coastal area, Allasso Energy's Karratha South permit provides a major opportunity to deliver reliable green baseload power generation to the existing heavy power users of the Pilbara coast and the North West Interconnected System (NWIS). As the region's energy users advance their decarbonisation strategies, current estimates indicate power requirements of over 3.5GW — significant demand that reliable geothermal baseload can help meet as part of a renewable power supply portfolio.

Geothermal power is uniquely suited to the Pilbara data centres supporting mine-site automation, because it delivers firm, weather-independent renewable electricity with the reliability profile that autonomous operations require. Unlike intermittent renewables, it  can improve reliability while enabling genuine Scope 2 emissions reduction, without reliance on oversized battery systems or fossil-fuel firming.  Geothermal power and thermal infrastructure may also support the significant cooling requirements associated with data-centre development. 

A range of geothermal development options is being progressed to enable Allasso Energy to scale generation to meet demand. Adjacent recorded geothermal gradients at Mardie-2 (87.1°C/km) and Mangrove Island (106°C/km) indicate high potential deliverability from the basement at shallow depths. An exploration program focused on identifying the highest-grade deliverable geothermal energy within this play type is underway. Matching this structured approach with a disciplined, cost-focused execution team allows Allasso Energy to commercialise this resource efficiently, on an expedited timeline to market.

  Carnarvon is recognised as a world-class green energy location that has attracted global investment. Allasso Energy's permit solidifies its presence in the region and positions geothermal energy as an always-on renewable power source for data centres and industry. 

Data centres powered by geothermal energy represent a step-change in digital infrastructure sustainability, delivering always-on, low-carbon electricity independent of weather and fuel-price volatility. Geothermal provides true baseload power with exceptionally high capacity factors, making it ideally suited to the continuous, high-reliability demands of hyperscale, AI and high-performance computing facilities. By co-locating data centres with geothermal generation, operators can materially reduce Scope 2 emissions, eliminate exposure to intermittency risk, and secure long-term power price certainty under fixed offtake arrangements.  Allasso is assessing conventional, advanced and closed-loop geothermal technologies to determine the most appropriate development solution for the resource and customer requirements. This combination positions geothermal-powered data centres as one of the most credible pathways to genuinely net-zero, industrial-scale digital infrastructure in Australia.

Allasso Energy also recognises the established agricultural industry of the southern Carnarvon region. With proven hot water flows from low-cost shallow reservoirs, the potential to support this sector through controlled-environment production is significant. Direct-use geothermal allows crops and aquaculture to be optimised through direct control of the growth cycle: the ability to heat, cool and manage humidity through automated systems provides complete environmental control, significantly increasing yields and enabling expansion into adjacent marginal areas.

Allasso Energy is also assessing options for land-based aquaculture within its permit, particularly in areas with direct ocean access suited to fisheries, prawns and asparagopsis (red algae feed supplement). The expansion of these industries can deliver significant direct benefits to Carnarvon.   

  The Ashburton region presents a major growth opportunity for Allasso Energy's Onslow Central permit. With high-quality geothermal deliverability within a few kilometres of existing and planned major demand infrastructure, this permit provides solutions to the area's decarbonisation requirements. Current estimates put existing green power demand at 500MW, with planned major projects driving this toward 1GW within a few years.

Several different play types exist within the permit, allowing deliverability risk to be managed. Offset data within the permit supports very high geothermal gradients — consistently above 60°C/km nearest to Onslow — including Topaz-1 (74.2°C/km), Topaz-2 (63.7°C/km) and Cane River-2 (76.6°C/km). These are among the highest geothermal gradients recorded in Western Australia, presenting the lowest-cost deliverability potential to industry. 

An appraisal program focused on identifying the highest-grade deliverable geothermal energy closest to existing infrastructure has been prioritised. Matching this structured approach with a disciplined, cost-focused execution team allows Allasso Energy to commercialise this resource efficiently, on an expedited timeline to market.