Objective and hypothesis
The project will test whether newly developed silica nano filaments (SNF) can protect well pipes and reservoir sediments from corrosion by highly acidic liquid CO2 solutions. This could potentially reduce corrosion inside of tubes and pipes but also the intricate hydromechanics within pumps, the inside of tanks and pipes. The project will help de-risk and reduce uncertainties with respect to the reuse of existing infrastructures for CO2 storage.

Approach
Silica nanofilaments (SNF) have been developed into reliable liquid-repelling coatings over the past years with applications in medicine, material science and the food industry. The project has been developing coatings for corrosion and scale inhibition. Furthermore, it is put forward to develop and test SNF coatings which can be applied as anti-corrosion coatings in Danish CO2 storage facilities. The project will fine-tune the coating procedure for the needs within Danish reservoirs (sediment types, steels alloys, corroded steel) and rigorously test the stability and effectiveness of the coating technology using in-house high-pressure reactors and the new large- scale testing facility.

Expected impact/output
The aim for this project is to be able to ‘spray’ the coating inside the new tubing before installed in an CO2 injection well. Hereby a significant extended lifetime of the CO2 injection well is expected and hereby reduce the number of workovers.