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  1. International Workshop on Power Generation with Carbon Capture and Storage 22-23 January 2008 Ashok Hotel Delhi Onshore storage and monitoring:the Otway Basin Project Dr Dennis R VAN PUYVELDE Technical and International Project Manager Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC) © CO2CRC. All rights reserved.

  2. Presentation Outline • Project Description • Site Selection • Monitoring & Verification • Atmospheric monitoring • Geochemical monitoring • Geophysical monitoring • Naylor 1 assemble • Conclusion

  3. CO2CRC Otway Project

  4. Otway Project Goals • Contribute towards CO2CRC Vision and Mission. • Demonstrate that CCS is technically feasible and environmentally safe. • Facilitate research into new monitoring technologies • Offer opportunities for trial and experimentation thereby supporting education/training in greenhouse gas technologies • Specifically demonstrate to the satisfaction of stakeholders that • CO2 can be safely produced, transported and injected into the sub-surface • CO2 can be safely stored • Subsurface behaviour of the injected CO2 can be effectively modeled and monitored • Storage Volume can be verified as far as possible • Build public support for CCS as a mitigation mechanism

  5. Project Location

  6. What were factors that led to the choice of the Otway Project site? • A source of carbon dioxide • Oil and gas tenements available at an affordable price • Large amount of exploration and production data • Infrastructure in place • Gas had demonstrably been trapped for a long time • Community familiar with the oil industry (plus and minus) • Logistically accessible • Adequate storage capacity & favourable geology © CO2CRC. All rights reserved.

  7. Reservoir Modelling & Simulation • Objectives: • To address risk in the inherent uncertainty of reservoir heterogeneity • To assess likely flow behaviour of any injected CO2 • How to reduce uncertainties? • CRC-1 findings (cores & logs) to refine the reservoir modeling & simulation • Other data (i.e. seismics) • How to be sure? • Reservoir modeling & simulation peer-reviewed = certification of injection plan • Results from reservoir modeling & simulation to be confirmed by M&V

  8. Simulation Results: CO2 in Cross-sectional View March 2008 CO2 around CRC-1 Dec. 2008 CO2 arrival Dec. 2010 CO2 in Naylor-1 • Injection @ 3 MMscf/d • Breakthrough 6-8 months • Up 100,000 tonnes of CO2 to be injected • Gas mixture from Buttress-1 is to be injected (78.8 mol% CO2) • Dissolution, residual trapping, diffusion are considered in model

  9. Atmospheric Atmosphere Surface Ecosystems Soil gas Hydrology Geochemistry Saline Water localised seepage buoyant vertical migration Confining Layer(s) Injected Carbon Dioxide Monitoring and Verification is a key part of CCS Assurance Monitoring Seal Storage Integrity Monitoring Remote Geophysics Geochemical Sampling lateral migration

  10. M&V activities for Otway Project

  11. Atmospheric Monitoring Sampling • Flux Tower & Lo-Flo Tower • Flask sampling • Continuous in situ air and soil flux sampling (CO2 sniffers) Results • Large pre-existing background variation in CO2 + other gases’ concentrations (Lo-Flo measurements + flask samples) • Emissions from CO2 storage: likely to be small • Leakage of stored CO2 could be discriminated isotopically (13C) • 3 ppm elevation of CO2 detected during CRC-1 drilling operation

  12. Atmospheric Monitoring Flux Tower Towards CRC-1 site Lo-Flo & air monitoring centre Air Monitoring (Lo Flo & Flux Tower)

  13. Geochemical Monitoring Groundwater/Gas Monitoring • Groundwater level measurements: Dataloggers installed in Feb 07 and downloaded twice per year until 2010 • Groundwater chemistry: • Characterisation of the shallow waters: low salinity, pH neutral, Na-Ca-HCO3-Cl composition • Frequency: once per year until 2010 • 4 baseline soil gas trips completed • Frequency: once per year until 2010 • Head Space Gas Survey • Presence, concentration and distribution of gases (including CO2) within selected boreholes • One baseline trip undertaken, 4 time per year until 2010 Downhole sampling • Tracers plan finalised (Kr, CD4, SF6) • Downhole Geochemical Monitoring (U-tube)

  14. Geochemical Monitoring

  15. Geophysical Monitoring Techniques • 3D Surface seismic • 3D Vertical seismic profiling (Naylor-1 & CRC-1) • High Resolution Travel Time (Naylor-1) • Continuous microseismic Seismic tested Baseline seismic completed by Feb 2008

  16. Pressure/Temp and U-tube Inlet Geophone with clamp (1.125 V - 1.5”? 3C) Hydrophone (1.25”) Rod 0.75” O.D. Bottom hole assemblyNaylor 1 2020 m Casing 2.9” I.D. Packer 2025 m Integrated Sonde Perf Patch 2.375” ID; 27’ long 2028-2035 m 2030 m Integrated monitoring assembly • 3 geophones, 3 hydrophones and 2 P/T sensors below the packer • 3 U-Tubes: • In the gas, below GWC, Water • 3 three-component geophones above the packer • An array of 8 single component geophones above these Gas 2040 m Depth Water Perf 80oC 17 MPa (2500psi) 2045 m 2050 m 2055 m Total Depth: 2060 m

  17. CO2CRC Otway Project – Summary Down hole seismic and U-tube sampling successfully installed & tested by LBNL and CO2CRC researchers in Oct 07. Inlet gas processing equipment is now on site. We will soon be completing pipeline constructions. Long term liability issues resolved. Expect to start injection in March 2008.

  18. CO2CRC Project OPERATIONS • CRC-1 successfully drilled (Feb 2007) • Downhole geochemical and geophysical assembly installed and tested at Naylor 1 • Surface plant currently under construction (to be commissioned in Feb 2008) • Pipeline to be installed by end Jan • Expect to start injection in March 2008 SCIENCE • Baseline monitoring studies completed by Feb 2008 APPROVALS • All regulatory approvals granted • CPPL approval to start injection • Long term liability issues resolved • Landowner issues resolved

  19. OBPP Financial contributors Government Contributors: Industry Contributors: Research Contributors:

  20. ACKNOWLEDGEMENTS Dr Sandeep Sharma Dr Peter Cook Dr Thomas Berly CO2CRC Otway Researchers Information - www.co2crc.com.au - dvanpuyvelde@co2crc.com.au