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Industry Experience of CCS : In Salah

Tony Espie, Advisor, CO 2 Storage. Industry Experience of CCS : In Salah. In Salah Gas Project. <0.3% CO2. 5-10% CO2. In Salah Gas Project. In Salah CO 2 Re-injection Project. Separated (yellow) CO 2 stored Combustion CO 2 (blue) vented. In Salah CO 2 Profile. Krechba Overview.

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Industry Experience of CCS : In Salah

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  1. Tony Espie, Advisor, CO2 Storage Industry Experience of CCS : In Salah

  2. In Salah Gas Project <0.3% CO2 5-10% CO2 In Salah Gas Project

  3. In Salah CO2 Re-injection Project

  4. Separated (yellow) CO2 stored Combustion CO2 (blue) vented In Salah CO2 Profile

  5. Krechba Overview Surface Vadose Overburden Reservoir

  6. KRECHBA FIELD – WITH LANDSAT

  7. 2yrs 5yrs 2yrs 5yrs Where is the CO2 going? • Simple simulation – high porosity, does not capture lateral heterogeneity or faults/fractures Saturation Pressure: up to ~6000psi

  8. CO2 Injection to mid 2007 • 70% of total produced CO2 injected to date with 3 injectors on line • Some injectivity decline due to reservoir pressure increase (not decline in injectivity index), could be improved with greater WHP. Re-injected

  9. Risk Based Approach to Monitoring • Injection well : Ongoing pressure monitoring • Early CO2 Breakthrough: Modelling, tracers, seismic imaging, observation wells • Vertical leakage : Seismic imaging, microseismic, aquifer studies, soil gas sampling, surface flux, gravity, tiltmeters, satellite imagery • Wellbore leakage: Annulus monitoring, soil gas sampling, continuous surface monitoring, through casing logging

  10. Seawater Chemistry Water chemistry Monitoring Technology: Prioritization Microbiology Low Flowmeters Cross-well EM Surface EM Aquifer studies Tiltmeters Park Satellite Imaging Airborne Flux Cement CO2 work Dynamic Modelling Observation Wells Surface flux Logging JIP Benefit Geochemistry 4D gravity Geomechanics 4D VSP Annulus Sampling Tracers Optimise Micro- seismic Wellhead monitoring Just Do It 4D Seismic Wellbore sampling Soil gas High High Low JIP Cost

  11. 120-2079 Questions ?

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