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Book Chapter

Petrophysical characterization of the Sherwood Sandstone from East Yorkshire, UK

By
Magdeline Pokar
Magdeline Pokar
1
ResearchSEA Ltd, 65 Covent Garden, Willingham, Cambridge CB4 5GD (e-mail: m.pokar@researchsea.com)
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L. J. West
L. J. West
2
School of Earth and Environment, University of Leeds, Leeds LS2 9 JT, UK
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N. E. Odling
N. E. Odling
2
School of Earth and Environment, University of Leeds, Leeds LS2 9 JT, UK
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Published:
January 01, 2006

Abstract

Petrophysical tests were conducted on core samples from the unsaturated zone of the Sherwood Sandstone Group in East Yorkshire. Tests were conducted to determine which physical parameters most influenced its hydraulic conductivity values. The main parameters analysed were grain-size distribution, pore-throat size distribution, clay content, mineralogy and porosity. A constant flow rate permeameter was used to measure saturated hydraulic conductivity values in the vertical direction (perpendicular to lamination), Kv, and horizontal direction (parallel to lamination), Kh. Hydraulic conductivity values in the vertical direction, Kv ranged from 0.004 to 0.12 m day−1 while values in the horizontal direction, Kh, ranged from 0.01 to 0.17 m day−1. Hydraulic conductivity anisotropy, Kh/Kv, varied from 0.6 to 35. Scanning electron microscope analysis showed this anisotropy to be caused mainly by millimetre-scale laminations. Representative bulk hydraulic conductivity values were estimated from the core data; bulk horizontal hydraulic conductivity, Khb, was estimated as 0.1 m day−1, and bulk vertical hydraulic conductivity, Kvb, as 0.01 m day−1. Principal components analysis and multiple regression analysis were used to determine parameters that affect hydraulic conductivity most. Grain sorting is established to be the most important parameter to influence Kv values; samples with fine laminations have relatively low Kv.

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Geological Society, London, Special Publications

Fluid Flow and Solute Movement in Sandstones: The Onshore UK Permo-Triassic Red Bed Sequence

R. D. Barker
R. D. Barker
The University of Birmingham, UK
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J. H. Tellam
J. H. Tellam
The University of Birmingham, UK
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Geological Society of London
Volume
263
ISBN electronic:
9781862395114
Publication date:
January 01, 2006

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