The Yorkshire & Humber area contains some of the biggest CO 2 emitters in the UK. The UK Southern North Sea (SNS) contains a number of gas fields and saline aquifers which could provide storage for some of that CO 2 . National Grid Carbon (NGC) has plans to connect these sources and sinks via a shared 24" pipeline in a hub & spoke arrangement called "The Humber Cluster Project". After several years of high level study using multi-client seismic surveys and a database of released well data, an

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... ticlinal structure of around 25 km length and 8 km width with a 275 m thick Bunter sandstone formation (saline aquifer) was selected for detailed analysis. Two crestal wells in the structure called 5/42 were drilled in 1970 and 1990 looking for hydrocarbons but only brine was found. Basic formation evaluation logs were acquired in both wells. Limited core and pressure data were acquired in the 1990 well. No record of any water analysis is available and the core and log coverage was limited. As of mid-2012 some uncertainties remained with respect to the suitability of 5/42 for CO 2 disposal. Little was known about the strength & permeability of the cap rock which consists of 10-12 m of shale overlain by about 80 m of halites and mudstones.