Upscaling innovative land seismic acquisitions for geological storage of CO₂ in Denmark

Due to the increasing interest towards geological CO₂ storage as an important contribution to the reduction of atmospheric CO₂ levels, large-scale land seismic acquisitions have been prioritized in Denmark, to characterize subsurface conditions suitable for long-term CO₂ storage. We present an up-scaled seismic survey performed in Havnsø in the Zealand of Denmark in order to image a major anticline structure and interpret the entire stratigraphy relevant for the storage. The survey covered different profiles having a total length of approximately 130 km and, following previous, smaller-scale successful examples, it benefited from wireless recorders spaced at 10 m and a moving landstreamer system consisting of 2 m spaced MEMs units for the data recording. As confirmed by the data quality, this fast and efficient acquisition work can achieve detailed imaging of the deeper sedimentary structures, while maintaining high resolution at shallower depths, making it valuable for large-scale CO₂ storage projects onshore.