GEOMECHANICS AND ENVIRONMENT OF CO2 GEOLOGICAL STORAGE

Abstract: 

The world faces an ever-increasing energy demand. Despite the rise in renewable energy sources, fossil fuels will be necessary for a long time. For sustainable and environmentally sound energy exploitation, CO2 handling is required for the mitigation of global warming. Carbon storage in geological formations, such as depleted hydrocarbon reservoirs or deep saline aquifers, represents today the most promising method to permanently store large quantities of industrially-produced CO2. The geomechanical effects of CO2 injection on the storage reservoir and its caprock and stimulation by hydraulic fracturing are critical in maximizing CO2 injectitivity, storage capacity and avoiding leakage. The environmental consequences of a leakage on overlying potable aquifers are also vital for the protection of water resources.

The aims are to address CO2-fluid-rock interactions affecting reservoir quality and caprock integrity, reactivity with well cements and its effect on cement properties, and fault reactivation potential during CO2 injection. Hydraulic fracturing in reservoir formations will also be studied to maximize injectivity and assure fracture containment. Environmental aspects of CO2 leakage will be investigated to assess the consequences of CO2 contamination of overlying potable water aquifers.

The results will provide

  1. insight to support geomechanical characterization and assessment of potential storage sites and their surrounding area as required in the Directive on geological storage, and thus facilitate the large scale deployment of CO2.
  2. Geochemical and chemo-poromechanical models for CO2 injection.
  3. Evaluation of long-term environmental consequences of CO2 leakage on surrounding aquifers through numerical predictions and experimental confirmation of aquifer properties, composition of groundwater and growth of biofilms, and
  4. Implementation in simulators for near wellbore and reservoir scale simulations, including hydraulic fracturing and validation.

Project info

Acronym:
GEOMECS
Coordinating Institution:
Aristotle University of Thessaloniki
Scientific Coordinator:
Papamichos Euripides
Research Team 2 Leader:
Exadaktylos George
Research Team 3 Leader:
Koukouzas Nikolaos
Research Team 4 Leader:
Chrysikopoulos Constantinos

Stats

I.D.:
1100
Mis:
377336
Duration (months):
43
Budget:
600 000.00
Diavgeia:
ΑΔΑ: Β4ΛΑ9-ΨΙΜ

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