Identification

Title

Geomechanical Properties of the Carboniferous Middle Coal Measures: Influence on fracture fluid flow and frictional stability during geothermal utilisation (UKGEOS Glasgow)

Abstract

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.

Resource type

dataset

Resource locator

https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item134006

function: information

Unique resource identifier

code

http://data.bgs.ac.uk/id/dataHolding/13607611

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Additional information source

For more information on the project, visit www.ukgeos.ac.uk.

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Geomechanics

Mudstone

Abrasion

Compressive strength

Core sampling

Sampling

Sample analysis

Friction (geomechanics)

Tensile strength

Fluid flow

Siltstone

Carboniferous

Drilling

Fracture analysis

Boreholes

Scottish SDI

Permeability

Sandstone

UK Location (INSPIRE)

Coal

originating controlled vocabulary

title

reference date

date type

revision

effective date

2022

Keyword set

keyword value

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

-4.2215

East bounding longitude

-4.2009

North bounding latitude

55.8414

South bounding latitude

55.8384

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2002

code identifying the extent

Glasgow [id=1298677]

Vertical extent information

Minimum value

0.0000

Maximum value

199.0000

Coordinate reference system

authority code

www.epsg.org

code identifying the coordinate reference system

Temporal reference

Temporal extent

Begin position

2019-12-02

End position

2020-02-28

Dataset reference date

date type

publication

effective date

2021-10-03

Frequency of update

notPlanned

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Data format

name of format

pdf

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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.

Responsible organisations

Responsible party

contact position

Department of Environmental Sciences

organisation name

University of Liverpool

full postal address

Jane Herdman Building, 4 Brownlow Street

Liverpool

L69 3GP

email address

not available

responsible party role

originator

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

distributor

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

telephone number

+44 115 936 3100

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2025-03-03

Metadata language