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9:00 am - 10:40 am - 25 February 2026
Plenary 2 - Beyond Australia - CCS in the Asia Pacific
Chair: Mark McCallum
This plenary examines the role of CCS in enabling regional decarbonisation across the Asia–Pacific, from supporting hydrogen and ammonia industries to facilitating transboundary CO2 transport and storage.
This plenary examines the role of CCS in enabling regional decarbonisation across the Asia–Pacific, from supporting hydrogen and ammonia industries to facilitating transboundary CO2 transport and storage.
9:00 am
This presentation outlines the key moving parts required to enable carbon capture and storage at scale for hard-to-abate industries in Australia and the APAC region. It highlights LETA’s role in supporting technology investments and projects, coordinating industry, research, policy, and international partners, and underscores the importance of national CCS coordination to support investment, deployment, and long-term emissions reduction.
9:20 am
CCS policy and projects continue to progress across the Asia-Pacific region. This presentation will be an update on key developments in China, Japan, South-East Asia and Australia.
9:35 am
Indonesia’s commitment to achieving a low-carbon future is driving rapid progress in carbon capture and storage (CCS) as a critical component of the national energy transition agenda. This presentation provides an overview of Indonesia’s evolving energy transition strategy, highlighting how CCS is positioned to support both decarbonization goals and the continued role of domestic industries. It outlines the latest developments in CCS regulatory frameworks, including emerging government policies designed to enable investment, clarify permitting processes, and establish long-term liability mechanisms. The talk also reviews the current landscape of CCS initiatives across Indonesia—ranging from early-stage feasibility studies to large-scale hub concepts being pursued by major operators. Finally, it explores the key pathways to accelerate CCS deployment in Indonesia, emphasizing the need for regulatory certainty, financial incentives, regional collaboration, and technology-ready infrastructure to unlock the nation’s substantial geological storage potential and ensure CCS becomes a scalable climate solution.
9:50 am
The London Protocol’s Export Amendment for CCS is a truly enabling international legislation. This took a lot of work by many countries, led by Norway, and supported by IEAGHG. This presentation will summarise this positive development and the projects being realised as a result. The Paris Agreement Article 6.4 creates the international framework for carbon credits from project activities and explicitly includes CCS. So potentially enabling financial value of the CO2 reductions to be internationally transferrable. Mention will also be made of the relevant parts of IPCC guidance and COP30.
10:05 am
Australia is endowed with extensive natural resources including sedimentary basins suitable for geological storage of CO2. Under the Resourcing Australia’s Prosperity initiative, Geoscience Australia will build on over 20 years of research and pre-competitive data acquisition to develop a better understanding of Australia’s geological storage resource potential. This includes establishing the National Carbon Dioxide Storage Resource Atlas and developing an improved capacity to assess injectivity and whole of basin pressure management. In combination with policy efforts to enable transboundary movement of CO2, the outcomes of the initiative will further cement Australia’s role as a key regional hub for emissions reduction.
10:20 am
Debates about Australia’s CCS prospects often begin with seemingly rational questions of “competitive edge”: the ability to attract investment, deliver projects efficiently, secure bankable storage, and sustain clear, clear regulatory settings. But alongside this analytical frame sits a more forceful realpolitik: shifting CCS narratives, activist pressure, investor scepticism, and short-cycle political volatility that can undermine long-cycle project needs. This presentation counterpoints these two lenses—what the evidence says Australia needs to stay ‘competitive’, and how political dynamics shapes outcomes. By comparing peer jurisdictions, we test whether Australia is gaining, holding, or losing ground—and what actions might restore credibility and leadership.
10:35 am - 11:10 am - 25 February 2026
Morning Tea Break
Session - CO2CRC CCS Symposium 2026
11:10 am - 12:40 pm - 25 February 2026
Technical Session 3a - Verifying Storage: Established and Emerging Monitoring
Chairs: Fiona Elmer & Dr. Hadi Nourollah
Session Highlights:
Session Highlights:
- Understanding the utility of high-resolution seismic, fibre-optics and geochemical techniques to develop high-confidence CO2 storage monitoring systems.
- Showcasing techniques for monitoring, interpreting, and managing subsurface CO2 storage performance from the latest Otway Stage 4 Program.
11:10 am
The CO2CRC Otway International Test Centre in Victoria serves as a globally recognised research facility for advancing monitoring technologies that ensure safe and effective geological carbon storage (GCS). Stage 4 Otway Project is designed to test continuous and time-lapse seismic monitoring during controlled CO₂ injection into a heterogeneous saline aquifer at ~1.5 km depth. Between November 2024 and January 2025, 10 kt of CO₂-rich gas were injected. Monitoring utilised distributed acoustic sensing (DAS) across multiple wells, permanent surface orbital vibrators (SOVs), and time-lapse vertical seismic profiling (VSP) surveys to provide both active and passive seismic datasets.
For Stage 4, the final monitor dataset from the Stage 3 campaign in 2021 was adopted as the baseline. The first dedicated Stage 4 monitor (M9) survey was acquired in February 2025. A dedicated 4D processing workflow produced coherent and repeatable results across vintages, enabling robust time-lapse comparison. The 4D analysis successfully imaged the full 10 kt CO₂-rich gas plume, with anomalies clearly observed near the CRC-4 and CRC-5 wells, consistent with the injection interval and the known heterogeneity of the aquifer. These observations confirm the ability of DAS-enabled VSP to resolve plume migration and geometry at the reservoir scale.
A further 10 kt injection is scheduled for January–March 2026. Two additional monitor surveys are planned for December 2025 and March–April 2026, which will extend the dataset and further validate permanent, fibre-optic based seismic monitoring as a cost-effective and scalable solution for long-term CO₂ storage conformance and assurance.
11:25 am
Distributed acoustic sensing (DAS) is well-suited to detecting induced seismicity, but routine processing must cope with terabytes of data, heterogeneous backgrounds, and severe class imbalance. Classical STA/LTA—originally devised for single seismometers—requires adaptation to massive sensor arrays and modern acquisition geometries. We present a practical workflow that augments multi-channel coincidence STA/LTA with positive–unlabeled (PU) learning and distance-based ranking. From each trigger we compute compact temporal and spatial attributes tailored to DAS (e.g., temporal consistency/uniformity, spatial continuity, channel-gap statistics, coincidence efficiency), apply log transforms to mitigate heavy tails, and robustly scale with respect to the positive class. Without explicit negatives, we learn the geometry of the positive manifold from a small set of labeled microseismic examples and assign each unlabeled trigger an ensemble similarity score that combines distance to the positive centroid with k-nearest-neighbour proximity in standardized feature space. The system operates section-wise for long arrays with chunked I/O and caching, yielding auditable rankings that reduce tens of thousands of triggers to a few hundred candidates for expert review. We demonstrate the workflow on subsea DAS data and outline its extension to other acquisition geometries, including downhole and surface deployments. The approach is conservative, scalable, and interpretable: it prioritizes events similar to known positives while avoiding over-commitment to assumed negatives, and it is designed to accommodate future incorporation of geometry-specific priors as catalogues grow.
11:40 am
Presented by Curtin University. More details to follow.
11:55 am
When CO2 is injected into deep saline aquifers, the resulting pressure build-up may cause micro-seismicity, fault reactivation, and induce damaging earthquakes. Continuous strain data are needed to measure vertical strain migration. Deploying a fiber-optic cable behind a well casing for subsurface geomechanical monitoring offers the opportunity to continuously track the deformation (strain) along the fiber-optic cable.
We conducted water injection/production tests in both domestic and overseas sites and measured the strain profiles by using distributed fiber optic strain sensing (DFOSS) technique. Strain sensing based on Rayleigh scattering is focused on caprock deformation as well as well integrity monitoring due to the pressure build-up caused by CO2 injection, and the pressure communication between the injection/observation well and the ground water well when producing water for sampling following the regulation.
12:10 pm
Carbon capture and storage projects in deep reservoirs have
significant monitoring obligations associated with regulatory needs and social licence to operate. Downhole methods are becoming increasingly attractive because of their low surface footprint and ease of stakeholder engagement. When several wells are available, monitoring from VSP-based seismic methods is possible using downholeDAS fibre optics, and even lower footprint seismic methods are possible using surface orbital vibrators combined with DAS. Crosswell pressure tomography (PT) monitoring is also possible using test water injections in completions in the reservoir interval and downhole pressure gauges. Monitoring confidence is enhanced when all monitoring data can be explained with a single model or range of models, which requires joint Bayesian inversion. However, simultaneous inversion of time-lapse seismic data and PT data is generally a difficult problem involving coupled multi-physics modelling. In the CCS context, highly buoyant and thin gas plumes make the problem susceptible to effective approximations that enable decoupling of the physics, and thereby a cascaded Bayesian inversion for both seismic amplitudes and crosswell pressures. We show inversions for the Otway stage 3 CCS demonstration project using these ideas.
significant monitoring obligations associated with regulatory needs and social licence to operate. Downhole methods are becoming increasingly attractive because of their low surface footprint and ease of stakeholder engagement. When several wells are available, monitoring from VSP-based seismic methods is possible using downholeDAS fibre optics, and even lower footprint seismic methods are possible using surface orbital vibrators combined with DAS. Crosswell pressure tomography (PT) monitoring is also possible using test water injections in completions in the reservoir interval and downhole pressure gauges. Monitoring confidence is enhanced when all monitoring data can be explained with a single model or range of models, which requires joint Bayesian inversion. However, simultaneous inversion of time-lapse seismic data and PT data is generally a difficult problem involving coupled multi-physics modelling. In the CCS context, highly buoyant and thin gas plumes make the problem susceptible to effective approximations that enable decoupling of the physics, and thereby a cascaded Bayesian inversion for both seismic amplitudes and crosswell pressures. We show inversions for the Otway stage 3 CCS demonstration project using these ideas.
12:25 pm
Facilitated Q&A
11:10 am - 12:40 pm - 25 February 2026
Technical Session 3b - Australian Onshore CCS: Progress and Perspectives
Chairs: Damian Dwyer & Paul Barraclough
Session Highlights:
Session Highlights:
- Opportunities, limitations and key findings from Onshore CCS projects around Australia.
- Followed by a facilitated Q&A on deploying onshore CCS projects around Australia.
11:10 am
This presentation draws on key lessons from Australian onshore CCS projects, informed by LETA’s involvement across project investment, research programs, and policy engagement. It will examine what has worked, where challenges remain, and how insights from project delivery, regulatory experience, and technical studies can inform future deployment. The presentation will also reflect on the conditions needed to progress onshore CCS in Australia, including policy settings, stakeholder coordination, and pathways to scale.
11:15 am
Queensland’s CTSCo carbon capture and storage (CCS) pilot was once the most advanced onshore CCS project in Australia’s east – a flagship test case bridging research to commercial-scale deployment. Despite robust technical planning and early engagement efforts (over 1,600 stakeholder interactions), this pioneering project failed to secure enduring social licence in the face of orchestrated misinformation and opposition. Influential agribusiness interests mobilised fear campaigns claiming catastrophic risks to groundwater, drowning out scientific assurances of safety. Local communities were largely supportive, but their voices were muted as political momentum built against the project. As Queensland’s 2024 election loomed, anti-CCS narratives gained traction among local politicians and media, culminating in a sudden state government ban on CO₂ storage in the Great Artesian Basin. This abrupt decision – made despite the project’s regulatory compliance and supporting scientific evidence – not only terminated the decade-long, $50 million CTSCo initiative, but also sent a chilling signal to investors. The collapse of political will highlighted how fragile social licence and policy support can derail even well-founded CCS projects. This case study distils key learnings for future CCS endeavours. It underscores the importance of proactive, fact-based stakeholder engagement and trust-building to counter misinformation. It also contrasts Queensland’s setback with broader national trends: while Australia has numerous CCS projects underway, Queensland now has none. Meanwhile, other jurisdictions are emerging as CCS leaders due to favourable geology, strong political backing and clear regulatory pathways. Western Australia, South Australia and the Northern Territory exemplify how aligning technical readiness with community and government support can drive CCS success. Queensland’s experience offers a cautionary tale – and a roadmap for others to avoid missteps and foster durable social licence for CCS.
11:25 am
Starting up in October 2024, the Moomba Carbon Capture and Storage project (Moomba CCS) in South Australia’s Cooper Basin has safely and successfully stored 1.3 million tonnes CO2 equivalent (CO2e) in the first year of injection.
This paper looks back over the first year of injection performance into the depleted Permian-age Toolachee Formation via five purpose-drilled injector wells. The paper also reviews the results of the monitoring and verification activities undertaken to demonstrate safe storage of CO2 within the complex, including injection telemetry, pressure and CO2 saturation. In addition, insights from the passive seismic monitoring array will be discussed. Learnings from this project have implications for other CCS projects targeting depleted hydrocarbon reservoirs.
11:40 am
Sequestration of Carbon Dioxide (CO2) is a critical part of the journey to carbon net zero. Already in Australia there are two commercial carbon sequestration plants, Gorgon on the North West Shelf and Moomba in the Cooper Basin. Both are operated by oil and gas companies that produce CO2 associated with gas production and inject the CO2 into subsurface reservoirs. Australian Carbon Vault (ACV) is a company without oil and gas association/production and holds Gas Storage Exploration Licences (GSELs) in the Arckaringa Basin. The company is building an integrated network across SE Asia to acquire, transport and store permanently CO2. This paper describes the process ACV is undertaking in building a Carbon Sequestration business in South Australia. With success, ACV has the potential to transform the Australian Carbon Sequestration landscape.
11:55 am
A comprehensive exploration campaign was undertaken to assess the carbon dioxide storage and geothermal potential in the Darling Basin. The work utilised seismic surveys, drilling, wireline and MWD logging, conventional coring and laboratory analyses. Three wells, Mena Murtee-1, Coona Coona-1 and Coona Coona-2, successfully intersected the target reservoirs within the Upper Devonian sandstone units. Results indicate the Pondie Range Trough has a normal geothermal gradient and the capacity to store around 240 million tonnes of CO₂ over 50 years, supported by extensive regional seals, fair reservoir quality and manageable project risks.
The program has substantially improved knowledge of the Darling Basin’s geothermal and storage potential and established a strong platform for future carbon capture and storage (CCS) development. All data acquired will be made publicly available and the next phase will deliver flow test results that are critical for validating CO₂ storage resources.
12:10 pm
Facilitated Q&A - Panel
12:40 pm - 1:40 pm - 25 February 2026
Lunch Break
Session - CO2CRC CCS Symposium 2026
1:40 pm - 2:40 pm - 25 February 2026
Technical Session 4a - Delivering Scalable CO2 Storage for the Energy Transition
Chairs: Simon McMahon & Dr. Max Watson
Session Highlights:
Session Highlights:
- Overview of the progress of CCS deployment around the world, and in Australia, and what is required to reach the level of deployment needed to support the energy transition.
1:40 pm
To enable the rapid deployment of carbon storage for blue ammonia projects, several key enablers must be in place. These include:
- A stable, long-term carbon pricing mechanism
- Clear and robust regulatory frameworks
- Public acceptance and trust
- A supportive environment for hub-scale infrastructure development
In regions where regulations are still evolving or public confidence is limited, third-party certification can play a critical role in accelerating deployment. Certification and verification—based on internationally recognized standards such as ISO 27914:2017—help ensure the safe and effective geological storage of CO₂.
The benefits of certification and verification for a CO2 storage are various such as:
The benefits of certification and verification for a CO2 storage are various such as:
- Builds trust: Demonstrates compliance with rigorous international standards, reassuring both public and private stakeholders—especially in regions new to CO₂ storage.
- Supports regulators: Independent reviews provide assurance to governments and regulators that projects meet global best practices, aiding informed decision-making.
- Facilitates project development: ISO 27914:2017, alongside other industry guidelines, serves as a practical reference for permitting and development, particularly where CCS regulations are still emerging.
- Attracts partners: Certification signals credibility, encouraging investment and collaboration from potential partners.
- Enables EU market access: Compliance with ISO 27914 supports alignment with the EU Sustainable Taxonomy, which is essential for non-EU suppliers exporting carbon-intensive products offset by storage.
- Improves funding prospects: Certified projects are better positioned to access public funding opportunities, such as the EU Innovation Fund, by demonstrating adherence to high standards.
Certification can be applied across the full lifecycle of a CO₂ storage project. Case studies will be shared to illustrate how third-party certification—aligned with international standards—has successfully supported project development and implementation at various stages.
1:55 pm
Over the past 25 years, the CCS community has sought to understand Australia’s potential CO2 storage resources. Collectively, we have completed a great deal of high-quality work on storage site assessments, yet we are still lacking a comprehensive and defensible national-scale picture of where our storage resources are located, their potential, and an understanding of the scale of CCS industry that can realistically be supported. This understanding is essential to help meet Australia’s - and potentially our region’s - emissions reductions targets, and for effective planning, regulatory oversight and investment – all targeted to more rapidly put Australia at the forefront of the CCS industry.
Under the Australian Government’s Resourcing Australia’s Prosperity initiative, Geoscience Australia, in collaboration with key stakeholders, is leading the development of the National Carbon Dioxide Storage Resource Atlas. The Atlas will provide both national and sub-basin scale data on the location, capacity, injectivity and integrity of Australia’s geological storage resources within a long-lived framework that incorporates existing and new assessments, and allows for refinement as new areas are investigated, new scientific findings come to light, and more CO2 storage projects become operational.
Our approach is based on the play-based exploration pyramid and is designed to be consistent with the CO2 Storage Resource Management System. This includes a tiered assessment process, progressing from basin-scale assessments to play then prospect scale evaluations in order to identify play fairways, leads and assess injectivity and capacity in promising plays. These assessments will be assimilated into a big picture, national-scale play-fairways ‘map’ that will particularly assist with regional planning, source-sink matching and identification of gaps to focus future work.
The Association of Southeast Asian Nations (ASEAN) comprises the countries of Indonesia, Vietnam, Malaysia, Thailand, the Philippines, Singapore, Myanmar, Laos, Cambodia, Brunei, PNG and East Timor. Despite total CO2 emissions from these nations amounting to nearly 2 gigatons in 2024, only Indonesia, Vietnam, Malaysia Thailand and East Timor are actively pursuing CCS projects. This presentation briefly summarises the various projects in these nations. Indonesia is committed to achieving net-zero emissions and is actively pursuing the development CCS technology with a vision of establishing itself as a regional CCS hub. This initiative is not limited to domestic CO2 capture, but also seeks international participation. The Indonesian government estimates a substantial CO2 storage potential ranging from 400 to 600 gigatons within depleted reservoirs and saline aquifers. Indonesia has identified 27 CCS/CCUS projects that are currently in the study and preparation phase. Many of these projects are anticipated to be operational by 2030. To fulfil these ambitious commitments, Indonesia has implemented specific regulations to promote CCS. The first commercial scale project is BP’s well-advanced Tangguh CCUS project in West Papua inaugurated on 24 November 2023, with its first carbon injection expected to take place in 2026. Indonesia is taking advantage of UNFCCC’s Joint Crediting Mechanism (JCM) in partnership with Japan. Malaysia has 2 major regions where it is investigating CCS. The Malay Basin has multiple offshore gas fields in various stages of depletion which are being screened for their potential as storage sites. The most advanced project, however, is in the Sarawak Basin, where Petronas has made its final investment decision FID for capturing CO2from the Kasawari gas field (25% CO2) and transporting it via a 135km subsea pipeline to the depleted M-1 gas field. Similar plans are in place for taking CO2 (17%) from the Lang Lebah field for injection into the Golk depleted field. Malaysia has entered into numerous partnerships and collaborations with global CCS investors in Japan and Korea and has set up the world’s first Sharia-compliant Carbon market. Vietnam has begun site selection in its Song Hong Basin with plans to inject more than 1 mta into a number of promising sites where site characterisation is underway in Blocks 103-104-107. Thailand’s national upstream company PTTEP is gearing up to develop the country’s first carbon capture and storage (CCS) project at its producing Arthit offshore gas field. Preliminary front-end engineering and design (FEED) work has commenced, and the Arthit CCS project is expected to commence operations by 2026.East Timor is undertaking a major CCS project overview for its foundation project to transport CO2 from Darwin LNG facility for storage in the in Bayu-Undan depleted gas field. The field is well characterised and understood through decades of exploration, appraisal and production data, making it an ideal storage target. Singapore has initiated the S-Hub project plans to capture and securely store CO2 emissions from Singapore’s industrial sources, with ExxonMobil and Shell selected to work with the Government of Singapore on a CCS value chain capable of capturing and permanently storing deep underground or under the seabed at least 2.5 million tons of CO2 a year, by 2030.
2:25 pm
Confronting today’s energy realities means finding practical ways to reduce emissions while keeping Australian industry competitive. LNG, steel, cement, and other hard-to-abate sectors face the dual challenge of meeting safeguard requirements and remaining cost-competitive in global markets. CCS is central to addressing this challenge. There is no credible pathway to net zero without large-scale storage. But it must be delivered in a way that is efficient, affordable, and investable. The opportunity lies in reducing costs through innovation, sharing them through multi-user hubs, and offsetting them by providing storage technologies and potentially services across sectors and to Australia’s trading partners.
CO2CRC’s Future Research Program 2026–2035 has been designed with this in mind. Drawing on two decades of applied experience at the Otway International Test Centre, the program will collaboratively re-establish Australia’s research capability and deliver the expertise needed to scale geological CO2 storage (GCS) with confidence. The eight research themes build capability across the full storage system: improving predictive models of plume behaviour; validating geomechanical thresholds to avoid over-conservatism; advancing cost-effective, environmentally responsible monitoring solutions, including offshore M&V; developing basin-scale planning tools for shared hubs; de-risking infrastructure reuse and well integrity; embedding AI and digital twins to accelerate site evaluation; applying techno-economics to guide investment; and rebuilding the skilled workforce and postgraduate pipeline. Together, these activities reduce uncertainty, drive down costs, and create the confidence needed for investment.
For industry, the program will show how GCS can be deployed competitively, while enabling shared hubs and new low-carbon exports. For government and regulators, it provides assurance that projects are predictable and aligned with national policy. And for Australia as a whole, it builds sovereign capability and creates opportunities to export knowledge, technologies, and services across the Asia-Pacific.
1:40 pm - 2:40 pm - 25 February 2026
Technical Session 4b - Deriving Value from Fault Studies and Field Experiments
Chair: Genna Petho & Tomy Seman
Session Highlights:
Session Highlights:
- Understand how field scale research, such as the Otway Shallow Fault project, can support broader understanding of plume behaviour, storage performance and monitoring requirements.
1:40 pm
Faults can act as preferential pathways for fluid migration during geological CO2 sequestration, potentially compromising storage integrity. Understanding flow and deformation behavior around faults during fluid injection is therefore critical. We conducted stepwise water injection tests (50–150 L/min) into a faulted limestone formation at approximately 120 m depth at the Otway International Test Centre. The injection well’s screen interval was 98–110 m depth. Distributed fiber-optic sensors installed in two observation wells recorded depth-distributed strain responses during injection. Near-injection depths exhibited rapid and large strains, while shallower layers showed alternating patterns of high and near-zero strain, suggesting complex subsurface flow behavior. Coupled flow–deformation simulations using a model with depth-variable permeability were performed to interpret the observations. Reproducing the observed strain distribution required assigning high permeability to the fault zone. Although it remains uncertain whether the fault itself or another high-permeability pathway dominated flow, the model indicates enhanced fluid migration into shallow layers is essential to explain the measured strains. These results suggest that vertically distributed strain monitoring can constrain subsurface flow models and identify fluid pathways in heterogeneous formations. The integration of distributed strain measurements with coupled flow–deformation simulation provides a promising framework for real-time monitoring and early detection of leakage during CO2 sequestration, supporting safer and more effective storage operations.
1:55 pm
In Carbon Capture, Utilisation, and Storage (CCUS) projects, it is crucial to understand how faults influence fluid migration behaviour. This knowledge enables the assessment of risks associated with vertical gas migration through fault zones and supports the development of effective monitoring strategies for geological storage. Experimental field data also plays a vital role in validating fluid-flow simulations in the presence of faults, helping to establish and confirm whether these features inhibit or enhance CO2 movements. Presently, there is a lack of targeted empirical data to provide standardised guidelines. The shallow CO2 release project at the CO2CRC Otway International Test Centre provides valuable empirical insights into how carbon dioxide flows within vertical faults.
The shallow controlled CO2 release experiment has been conducted at the CO2CRC Otway International Test Centre, located in the vicinity of a known near-surface strike-slip Brumbys Fault, to simulate a CO2 leakage scenario and monitor its migration in the subsurface. The target fault is a normal fault dipping ~70 degrees east, and it is mapped to about 25 m below the surface. The experiment involves the injection of ~16 tonnes of gaseous carbon dioxide under the fault. The geophysical program employed a variety of active and passive borehole seismic methods to provide frequent, high-resolution snapshots of subsurface changes at a relatively low acquisition cost. The obtained series of monitor vintages showed the detailed evolution of the CO2 plume in the fault zone. The post-injection monitor indicates that the initial plume is divided into two large CO2-saturated regions, aligned with a fault, and that the gas has definitely reached the surface.
2:10 pm
Faults can be potential leakage pathways for geological storage projects. The Otway Shallow Fault Experiment was conducted at the Otway International Test Centre in April 2024 after 8 years of planning, detailed characterisation and modelling. Specifically designed to achieve leakage, this world first experiment tracked CO2 migration vertically up the fault and its release through the soil into the atmosphere. The experiment involved injecting 16 tonnes of CO2 into the Port Campbell Limestone aquifer over an 8 day period at approximately 70 m depth, adjacent the predominantly strike slip Brumbys Fault. The experiment was a success, with the observed CO2 migration behaviour matching the predicted modelled behaviour.
Extensive preparation went into characterising the site prior the experiment including a ultra high resolution 3D seismic survey, LIDAR survey, 4 wells equipped with fibre optics, coring through the fault zone, wireline logs, geochemical analysis, and an extensive multi-year groundwater level monitoring program. These results were used to prepare a detailed geological model of the site, which enabled dynamic modelling and simulations of CO2 migration behaviour under different injection scenarios. The groundwater monitoring provided insight into the nature of the aquifer, the permeability of the fault, and permeability of the overlying clay layer at the site. Vertical 2.5D sand tank analog models were used to validate the simulation results in terms of fluid migration pathways, including CO2 migration time.
Monitoring the CO2 migration behaviour during the experiment using reverse 4D VSP revealed that the CO2 migrated vertically up the fault zone as expected. Soil flux monitoring determined that the CO2 reached the surface within 30 hours. Adjusted for the actual injection rate and pressure during the experiment, CMG GEM modelling predicted the CO2 would reach the surface clay layer in 40 hours. This experiment provides confidence that current fault modelling approaches are effective and these are the same techniques used assess security of large scale storage of CO2 against mapped faults at depth.
2:25 pm
As part of geological carbon storage, caprocks of lower permeability play an important role to restrict CO2 escaping from the storage complex. However, some unexpected geological faults may exist in in the storage complex or the overburden and can be possibly reactivated due to the CO2 injection. Understanding the role of faults and fractures as fluid pathways, through overburden strata, to the surface is critical to ensure storage safety. Fault flow behaviour has been studied in the context of hydrocarbon development, supported by observations from wells drilled through faults, but such observations are rare in geological carbon storage projects.
Here, we focus on faults that pre-date CO2 injection. These faults can form barriers to across fault flow and conduits to along-fault flow. Precisely how faults will impact on fluid flow is dependent on a number of factors, including the fault history and geometry and host and fault rock properties, the thermodynamics conditions of the reservoir and fluids and the composition of the fluids.
Leakage from natural analogue CO2 stores occurs along faults (e.g. Miocic et al., 2016, Roberts et al., 2019). Studies of these natural analogues find that faults are complex and channel fluids heterogeneously at depth and towards the surface (Roberts et al., 2015) and so understanding of how faults might affect CO2 migration is not straightforward.
In this work, we review the current understanding of fault leakage risk associated to pre-existing faults systems and how field experiments can complement desktop study and support fault leakage risk assessment.
2:40 pm - 3:10 pm - 25 February 2026
Afternoon Tea Break
Session - CO2CRC CCS Symposium 2026
3:10 pm - 5:00 pm - 25 February 2026
Plenary 3 - Who is delivering the CCS future?
Chairs: Simone de Morton (CO2CRC) and Scott Bailey (CarbonNet)
This plenary will focus on who is delivering CCS today, showcasing operational projects, strategies, and international investment shaping the next phase of deployment in Australia and the Asia–Pacific. The session will conclude with a panel discussion.
This plenary will focus on who is delivering CCS today, showcasing operational projects, strategies, and international investment shaping the next phase of deployment in Australia and the Asia–Pacific. The session will conclude with a panel discussion.
3:10 pm
Professor Sally M. Benson is the Precourt Family Professor of Energy Science & Engineering at Stanford University and a Senior Fellow at the Precourt Institute for Energy and the Woods Institute.
A global authority on carbon capture and storage and net-zero energy systems, she co-directs the Stanford Center for Carbon Storage and the Stanford Carbon Removal Initiative. From 2021 to 2023 she served in the White House Office of Science & Technology Policy as Deputy Director for Energy and Chief Strategist for the Energy Transition.
Previously, Professor Benson led Stanford’s Precourt Institute for Energy (Director/Co-Director, 2014–2020) and the Global Climate & Energy Project (2007–2019). Her honours include the Greenman Award (2012); she is a Member of the American Academy of Arts & Sciences (2023) and an International Fellow of the Australian Academy of Technological Sciences & Engineering (2024).
A global authority on carbon capture and storage and net-zero energy systems, she co-directs the Stanford Center for Carbon Storage and the Stanford Carbon Removal Initiative. From 2021 to 2023 she served in the White House Office of Science & Technology Policy as Deputy Director for Energy and Chief Strategist for the Energy Transition.
Previously, Professor Benson led Stanford’s Precourt Institute for Energy (Director/Co-Director, 2014–2020) and the Global Climate & Energy Project (2007–2019). Her honours include the Greenman Award (2012); she is a Member of the American Academy of Arts & Sciences (2023) and an International Fellow of the Australian Academy of Technological Sciences & Engineering (2024).
In October 2024, Santos achieved a transformational milestone with the delivery of the Moomba Carbon Capture and Storage (Moomba CCS) project, marking a very significant step in Santos’ three hub CCS strategy. In its first year of operations Moomba CCS safely stored 1.3 million tonnes of CO2e. In November 2025 Moomba CCS achieved another major milestone with the largest single issuance of Australian Carbon Credit Units (ACCUs) from the Clean Energy Regulator. This paper provides a project update on Moomba CCS covering the first year of operations.
3:40 pm
Chevron believes in the role carbon capture and storage (CCS) can play in a lower carbon world. In Australia, we are well placed to take advantage of this technology, and we are focused on leveraging our expertise to advance CCS technologies. David Fallon, General Manager – Lower Carbon Execution Australia will outline the role CCS can play – both here in Australia and across the Asia Pacific via partnerships with our key trading partners.
3:55 pm
Carbon Capture and Storage (CCS) remains positioned as a proven and practical decarbonisation solution that leverages Mitsui’s global conglomerate reach and utilises our strengths and partnerships across the E&P/LNG/Chemicals sectors. A portfolio of projects are being advanced globally, with the pace of development strongly influenced by demand and government policy.
4:10 pm
Panel - Are we confronting energy reality?
Andrew Garnett - Emeritus Professor at The University of Queensland - Australian Gas Industry Trust & UQ, Mark McCallum - Chief Executive Officer - Low Emission Technology Australia, Sally M. Benson - Professor, Energy Science & Engineering - Stanford University | Woods Institute for the Environment, David Byers - Director - CO2CRC, Brendan Beck - General Manager Policy - Australian Energy Producers
As the world tries to build net-zero emission energy systems, this real-world energy supply reality needs to be confronted. Despite pledges and aspirations to replace hydrocarbons, their use is essential, ubiquitous and growing to meet the needs of expanding economies and populations.
This makes reducing emissions from the consumption of fossil fuels while maintaining access to them for energy security and affordability the pre-eminent global and local energy challenge we face.
CCS technologies offer promise as the answer to that challenge. Yet there is a growing investment gap, with current CCS investment a fraction of what is required to get any transition to net zero energy on track. Australia is a vital global player in the development of CCS technologies and solutions.
This makes reducing emissions from the consumption of fossil fuels while maintaining access to them for energy security and affordability the pre-eminent global and local energy challenge we face.
CCS technologies offer promise as the answer to that challenge. Yet there is a growing investment gap, with current CCS investment a fraction of what is required to get any transition to net zero energy on track. Australia is a vital global player in the development of CCS technologies and solutions.
End Session Address
