How does the Moomba project achieve permanent carbon storage?

The facility captures carbon dioxide generated during regional natural gas processing operations, compresses the gas into a supercritical state, and transports it via pipeline to depleted geological reservoirs in the Cooper Basin. The CO2 is injected deep underground into porous sandstone formations capped by impermeable rock layers that permanently trap the gas.

Why is the 2-million-ton milestone significant for the energy transition?

Commercial-scale proof points are critical for validating that carbon capture technology can operate continuously and economically at scale. Storing 2 million metric tons within 18 months confirms that mature onshore fields can serve as scalable emissions abatement sinks, countering skepticism regarding the technical reliability and real-world performance of CCS.

What are the commercial benefits for upstream operators deploying CCS?

Deploying integrated CCS allows upstream producers to drastically reduce the Scope 1 emissions intensity of their sales gas, maintaining market access in regions with stringent carbon border adjustments and emissions regulations. Additionally, established injection infrastructure creates opportunities to offer commercial carbon disposal services to third-party industrial emitters.

Rigzone · May 26, 2026 (May 26) · 1 min read

Santos Says Moomba CCS Delivering Emissions Reduction at Scale

Analysis

AI-assisted analysis · reviewed by Yuri Kan

Santos has demonstrated commercial-scale operational success at its onshore Moomba Carbon Capture and Storage (CCS) facility in South Australia, reaching a milestone of 2 million metric tons of permanently stored CO2 within 18 months of operation. This achievement reinforces the viability of depleted reservoir carbon sequestration as a practical decarbonization pathway for upstream hydrocarbon producers. The milestone provides critical operating data that will influence capital allocation for emerging CCS hubs globally, highlighting the potential for gas producers to lower the lifecycle carbon intensity of their portfolios.

Key Facts

Australian energy operator Santos announced that the Moomba CCS facility has permanently sequestered 2 million metric tons of carbon dioxide equivalent.
The 2-million-ton sequestration milestone was achieved across an operational timeframe spanning slightly over 18 months.
The abatement volume is estimated to be equivalent to removing approximately 826,000 internal combustion passenger vehicles from the road.
The project is situated onshore in the Cooper Basin of South Australia, utilizing depleted oil and gas reservoirs for permanent geological storage.
Moomba CCS is designed to store up to 1.7 million metric tons of CO2 annually, making it one of the largest and lowest-cost operational carbon abatement projects globally.

Background & Context

The Cooper Basin has supported oil and gas extraction for over five decades, leaving extensive geological infrastructure and depleted subsurface reservoirs ideal for gas reinjection. As regulatory and investor scrutiny over upstream Scope 1 and Scope 2 emissions intensified, Santos sanctioned the Moomba CCS venture to abate emissions from its regional gas processing operations. The initiative represents a core pillar of Australia's broader strategy to establish regional carbon management hubs that serve both domestic energy producers and international industrial partners.

Market Impact

The successful ramp-up of Moomba establishes an essential operational benchmark for the global carbon management sector, proving that depleted gas fields can reliably achieve high-volume continuous injection without significant operational bottlenecks. For upstream operators, low-cost onshore CCS provides a blueprint to defend the commercial viability of natural gas assets under tightening carbon accounting frameworks. The demonstrated performance will strengthen project finance confidence for similar CCS developments worldwide, providing empirical cost and subsurface integrity data to lenders and environmental regulators.

What to Watch

Santos is expected to optimize injection rates toward the facility's full design capacity of 1.7 million tons per annum while exploring opportunities to third-party commercialize additional storage capacity in the Cooper Basin. Market watchers will closely monitor lifecycle operating expenditure metrics and reservoir pressure stability to validate long-term containment modeling. Furthermore, the verified performance will accelerate discussions around cross-border carbon credit certification and future carbon hub expansions in the Asia-Pacific region.

Frequently Asked Questions

How does the Moomba project achieve permanent carbon storage?: The facility captures carbon dioxide generated during regional natural gas processing operations, compresses the gas into a supercritical state, and transports it via pipeline to depleted geological reservoirs in the Cooper Basin. The CO2 is injected deep underground into porous sandstone formations capped by impermeable rock layers that permanently trap the gas.
Why is the 2-million-ton milestone significant for the energy transition?: Commercial-scale proof points are critical for validating that carbon capture technology can operate continuously and economically at scale. Storing 2 million metric tons within 18 months confirms that mature onshore fields can serve as scalable emissions abatement sinks, countering skepticism regarding the technical reliability and real-world performance of CCS.
What are the commercial benefits for upstream operators deploying CCS?: Deploying integrated CCS allows upstream producers to drastically reduce the Scope 1 emissions intensity of their sales gas, maintaining market access in regions with stringent carbon border adjustments and emissions regulations. Additionally, established injection infrastructure creates opportunities to offer commercial carbon disposal services to third-party industrial emitters.

Read on Rigzone