Geomechanical Properties of the Carboniferous Middle Coal Measures: Influence on fracture fluid flow and frictional stability during geothermal utilisation (UKGEOS Glasgow)
UKGEOS and Core Sample Analysis. Geomechanical testing was performed to determine triaxial compressional strength, tensile strength, frictional strength and permeability of sandstones, siltstones, mudstones and coals from eleven depth intervals within the GGC01 borehole, UK Geoenergy Observatories (UKGEOS), Glasgow, United Kingdom. Frictional strength tests were also performed on cuttings samples of sandstones, siltstones, mudstones and coals from the GGA08 borehole, Glasgow, United Kingdom. In total twenty-three tensile strength tests were performed on ten sampled intervals, and seven porosity measurements pre-and post-failure were taken. Nine triaxial compressive strength tests and twenty-one frictional strength tests were performed, with permeability measured both before and after failure or shear respectively. From compressive strength tests we also determined the Young’s modulus and Poisson’s ratio. Results of X-Ray Diffraction are also included in the dataset.
dataset
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item134006
function: information
http://data.bgs.ac.uk/id/dataHolding/13607611
eng
For more information on the project, visit www.ukgeos.ac.uk.
geoscientificInformation
publication
2008-06-01
Mudstone
Geomechanics
Sampling
Core sampling
Compressive strength
Sample analysis
Tensile strength
Friction (geomechanics)
Siltstone
Fluid flow
Fracture analysis
Drilling
Carboniferous
Boreholes
Sandstone
Permeability
Coal
revision
2011
NERC_DDC
-4.2215
-4.2009
55.8414
55.8384
revision
2002
Glasgow [id=1298677]
0.0000
199.0000
www.epsg.org
2019-12-02
2020-02-28
publication
2021-10-03
notPlanned
20mm x 40-70mm core plugs sampled from the GGC01 borehole were used for geomechanical testing in University of Liverpool's Rock Deformation Laboratory. All fabrics observed were sub-perpendicular to the drillcore axis so that maximum compressive stress in triaxial tests and tensile strengths are measured at 90° to these fabrics. Porosity was measured prior to testing using a helium pycnometer. In compressional experiments, cores were tested in a triaxial deformation apparatus. Samples were saturated with pore fluid at 2.5MPa and confining pressures were held at 6MPa. Permability was determined using the pulse-transient method. Tensile strength was measured on rock discs via a Brazilian test jig in a uniaxial press. Spare material was crushed to <125 microns and sheared between two porous metal plates to determine frictional strength. Crushed material was also used for XRD analyses.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Department of Environmental Sciences
University of Liverpool
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Liverpool
L69 3GP
originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
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pointOfContact
2023-01-23