OR/19/032 Physical collections and related data acquisition

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Monaghan, A A, Starcher, V, Dochartaigh, B Ó, Shorter, K, and Burkin, J. 2019. UK Geoenergy Observatories: Glasgow Geothermal Energy Research Field Site - Science infrastructure Version 2. UKGEOS Programme. British Geological Survey Internal Report, OR/19/032.

Overview

This section provides an overview of samples and data that the British Geological Survey plan to collect during the construction of the Glasgow Geothermal Energy Research Field Site, and how these will be made available to the research community.

Drilling data

During drilling, a wide range of operational data will be collected. These data include drillers’ logs and drilling parameters.

Core material

One core of around 180 m has been collected from GGERFS10 (seismic borehole) from a representative section of the Coal Measures Group stratigraphy.

The core was sampled for geomicrobiological analysis shortly after collection, with samples preserved by freezing at -80°C prior to transport to BGS Keyworth. A tracer was added to the drilling fluid as a marker for drilling fluid ingress into the core.

The core is being logged for lithology and fractures and will be described and interpreted to provide detailed insight into the stratigraphic evolution of the area and the depositional environments.

The core is being scanned at BGS Keyworth using the full suite of core scanning equipment documented in Appendix A - Working at UKGEOS.

The core material is stored in the BGS Keyworth core store, where it will be available for researchers to view and undertake further sampling/research.

Wireline logging

Geophysical wireline logs were collected to profile in-situ rock properties and support stratigraphic logging. The seismic monitoring borehole was logged as open hole with suite of tools including gamma, caliper, density, neutron, resistivity, sonic and flowmeter. Limited geophysical logging (gamma, caliper) will be undertaken in the deepest cased mine water boreholes at Sites 01, 02 and 03.

Physical core sample analysis

Physical core will be analysed for a range of microbiological, geochemical and geomechanical properties. The core will be available for researchers to undertake further analysis.

The BGS planned core sampling and scanning/logging include:

  • Time-dependent geomicrobiology sampling
  • Core scanning

Groundwater and fluid samples

Plans for sampling core and cuttings material, plus groundwater and other fluids (drilling fluids, gases etc.) are described in an overview sampling plan (UKGEOS report G0007), and summarised in Table 4, Table 5 and Table 6.

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