Objective and hypothesis
Several of the identified risks concerning CO2 storage are related to the risk of CO2 leakage in or near the well. In hydrocarbon fields, leaks have been recorded through the wellbore due to corrosion and mechanical failure of tubulars. This project concerns the monitoring that can be done inside and near onshore wells. It will consider the operational needs for monitoring and describe existing technology, such as well head monitoring (pressure, temperature, flow) and technology that could be improved or adapted for the continuous monitoring of the well.

Approach
The project will establish an overview of the existing monitoring technology and identify the most important gaps between existing technology and the operational and modelling need for data. Finally, the project will focus on the predictability of the reservoir model. A calibrated reservoir model is mandatory to interpret and predict responses from the reservoir in the injection – and post- injection periods.

Expected impact/output
Developing a good monitoring programme and suitable technologies is necessary for operating a CO2-storage reservoir. This project is a key part of preparing for a CO2 pilot in Stenlille, which has the potential to accelerate the implementation of full-scale CCS in Denmark by several years. The potential impact on climate is, therefore, significant. As CCS technology becomes large-scale, Denmark has a great potential for CO2 import, and by accelerating this technology, this project has the potential to improve the economic and societal benefits of storage significantly. Resulting methods and technology will be particularly well suited to monitoring re-purposed wells, such as converted oil and gas wells.