CO2CRC’s Otway Stage 3 M&V Project will develop and commercialise next generation subsurface M&V technologies.

Otway Stage 3 Project: Next Generation CCUS Monitoring.

The challenge

CO2 storage projects require monitoring and verification (M&V) to understand behaviour of the CO₂ plume and provide assurance of storage complex integrity.

The solution

CO2CRC’s Otway Stage 3 M&V Project will develop and commercialise next generation subsurface M&V technologies.

These technologies, explained in the video below provide on-demand, permanent monitoring solutions, enabling continuous plume data acquisition, transmission and analysis. They are expected to drive down costs by up to 75% while also decreasing environmental footprint of traditional monitoring techniques.

The proposed M&V techniques will provide regulators and communities with ongoing confidence that CO2 injected deep underground is permanently stored within the bounds of the storage formation in large scale CCUS projects.

Learn more about Stage 3 in Stage 3 technical details

Benefits to industry

The Otway Stage 3 project will benefit oil, gas, fossil-fuel based power generation and other industrial processes. These subsurface monitoring solutions can remove the need for on-going repeat surface seismic acquisition – significantly reducing operational costs and improving the economics of a CCUS project.

Other benefits include:

  • Continuous, on demand monitoring of plume shape and pressure
  • Moving monitoring technologies underground minimises interface with the environment and other industries such as farming, fishing, shipping, O&G operations and the community
  • A lower detection threshold of CO2` volume reduces the risk and cost of developing a CCS project
  • Enhancing a research facility that offers an accessible and fully instrumented international test centre for benchmarking M&V tools, testing CO2 storage processes and management techniques.

Implementation

Drilling of new monitoring wells commenced in July 2019. All base line surveys and pre-injection tests are on track to be completed by Q1 2020.

CO2 injection will commence in October 2020 at a rate of 150 tonnes per day. Injection will be paused after 5,000 tonnes to perform intermediate subsurface seismic, surface seismic and pressure tomography testing. Surface seismic data will provide a benchmark for comparison with the acquired pressure tomography and subsurface seismic data.

The injection will resume thereafter, and an assessment will be made to determine if the injection needs to be paused after 10,000 tonnes to perform another round of intermediate surveys. The final round of pressure and seismic surveys (subsurface and surface) will be performed once the full 15,000 tonnes of CO2 are injected

The volume of 5,000 tonnes was selected because it proved detectable in past benchmark surveys at the site. Modelling of the new Stage 3 techniques suggests that 5,000 tonnes will also be detectable via these methods. Further injections will be sized to give information about how sensitivity scales with mass.

Acknowledgements

The Otway Stage 3 Project is funded by the Australian Government’s Education Investment Fund, COAL21 through ANLEC R&D, BHP and the Victorian State Government. CO2RC would like to acknowledge the significant contributions from CSIRO and Curtin University.

Learn more about Stage 3 in Stage 3 technical details

The various facilities at the OITC, including deep wells, ground water bores, the buried seismic monitoring array, the CO2 production plant, gas pipelines and other infrastructure.

CO2CRC’s Otway Stage 3 M&V Project will develop and commercialise next generation subsurface M&V technologies.

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