CO2 geological storage- principles and potential in Israel

ד"ר רביד רוזנצוייג, המכון הגיאולוגי

In the talk I will describe the rationale and principles of CO2 geological storage. Special emphasis will be devoted to the processes controlling CO2 migration and trapping in the subsurface. I will then present the estimated CO2 storage capacity in Israel, as estimated in the last few years.

In the second part of the talk, I will present two studies related to CO2 geological storage. In the first, we study CO2 migration and trapping in the Jurassic saline aquifer of the Negev. This aquifer was identified as a potential site for CO2 storage. We use numerical simulations to study the CO2 spread, potential leakage and containment within the aquifer. We show that the layered structure of the aquifer could assist in trapping the CO2 within the aquifer and increasing the storage security. We also demonstrate the role of the stratigraphic setup and the structure of heterogeneity in CO2 migration and trapping.

In the second study, we use experiments in a laboratory aquifer model to investigate the effect of natural groundwater flow on CO2 dissolution within the aquifer. We show that groundwater flow has a significant affect on the gravitational instability generated by CO2 dissolution and on the dissolution rate. The correct estimation of the dissolution rate has important implications on the evaluation of the trapping efficiency and storage security and is therefore crucial for the site operation, design of a monitoring plan and risk assessment.

 


תאריך 18/12/2016 10:30 12:00
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