UK Geoenergy Observatories Cheshire : hydraulic testing of TH0424 technical summary

Bowes, M.; Crewdson, E.; Elsome, J.; Spence, M.. 2023 UK Geoenergy Observatories Cheshire : hydraulic testing of TH0424 technical summary. Nottingham, UK, British Geological Survey, 59pp. (OR/23/037) (Unpublished)

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Abstract/Summary

This report details the schedule and results of hydraulic testing of the TH0424 ground investigation borehole at the UK Geoenergy Observatory (UKGeos) Cheshire borehole array, Thornton Science Park during October 2022. UKGeos aims to establish new centres for world-leading research into the subsurface environment, generating data and knowledge to inform responsible development of new subsurface technologies (https://www.ukgeos.ac.uk/). Observatories are currently being developed at Thornton Science Park (TSP) in Cheshire (near the villages of Thornton and Elton), and near the Cuningar Loop of the River Clyde, Glasgow. Hydraulic testing was conducted using a straddle packer system to allow for isolated testing through the entire length of the water column, and to isolate specific features of interest (e.g. fractures, low permeability zones etc.), employing step and constant rate pumping test methodologies to provide response data that can be applied to hydraulic property models. The isolation of specific zones also allowed for the opportunity to collect groundwater samples and hydrochemical parameters, providing a profile of hydrochemical composition. The straddle packer system allows characterisation of dominant flow paths within the borehole and thus will aid in informing the design of multilevel monitoring boreholes within the array. This report does not serve as an interpretation of the collected data (although some basic analysis is undertaken), but rather aims to provide context to the collected dataset that can be utilised by the wider scientific research community. Development of the site at the time of testing (drilling of boreholes in close proximity) resulted in sub-optimal conditions for hydraulic testing and thus some data have been impacted by these activities. Perturbations or deviations in data thought to arise from these activities have been highlighted where possible. Abstractions from the Thornton Science Park abstraction borehole c.350m from the UKGeos array is also known to be detected at TH0424 with the site sitting within the radius of influence. Abstraction events taking place during individual tests have been highlighted and the full record of abstractions for the testing period is available. Borehole information packs available from UKGeos also provide daily drillers borehole records to relate any potential impacts from drilling activities. Considering the above caveats, care should be taken when using the data obtained during hydraulic testing and it should only be used in context of local activities, events or works. This report accompanies the full data pack of hydraulic testing data and supplementary information available at https://doi.org/10.5285/f1ad3bf6-f32a-4895-9f5f-8fa95c158832.

Item Type:	Publication - Report
Funders/Sponsors:	British Geological Survey
Additional Information. Not used in RCUK Gateway to Research.:	This item has been internally reviewed but not externally peer-reviewed.
Additional Keywords:	UKGEOS_CHESHIRE
Related URLs:	Dataset
Date made live:	12 Dec 2023 12:09 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/536445

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