Grain and pore microtexture in sandstone sill and depositional sandstone reservoirs: preliminary insights

Feng Wu; Andrew Hurst; Antonio Grippa

doi:10.1144/petgeo2017-027

Grain and pore microtexture in sandstone sill and depositional sandstone reservoirs: preliminary insights

Feng Wu^* (Corresponding Author), Andrew Hurst, Antonio Grippa

^*Corresponding author for this work

Southwest Petroleum University China

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

17 Downloads (Pure)

Abstract

Petrographical microtextural analysis and conventional core-plug analysis of samples from a depositional sandstone and a sandstone sill are used to compare with similar data derived from micro-CT (MCT) analysis of the same samples. A remarkable richness of information derived from the MCT data identifies isotropic granular and pore fabrics at the micrometre-scale in the sandstone sill that contrast markedly with the laminated fabric in the depositional sandstone. In the sandstone sill, porosity and permeability are more homogenous than in the depositional sandstone, in which lamination creates approaching two-orders of magnitude difference in permeability and enhances horizontal permeability relative to vertical permeability. In the sill, lower pore- and throat-shape factors and larger pore coordinate numbers are present than in the depositional sandstone. Preservation of the isotropic pore and grain structure in the sandstone sill is indicative of significant fluidized flow normal to the fracture margin during emplacement.

Original language	English
Pages (from-to)	236-243
Number of pages	8
Journal	Petroleum Geoscience
Volume	24
Issue number	2
Early online date	7 Dec 2017
DOIs	https://doi.org/10.1144/petgeo2017-027
Publication status	Published - 31 May 2018

Bibliographical note

We would like to express our gratitude to Dr Mehmet Kartal and Professor Dubravka Pokrajac for their help in micro-CT scanning and the use of Avizo software. We would like to thank Dr Giuseppe Palladino for the help in rock sample collection. We also very grateful to the anonymous reviewers for their valuable suggestions and the editors for their hard work, the feedback from them has led to considerable improvements in this manuscript.

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10.1144/petgeo2017-027Licence: Unspecified

Accepted Manuscript
This is the peer reviewed version of the following article: Petroleum Geoscience, 24, 236-243, 12 July 2017 https://doi.org/10.1144/petgeo2017-027 © 2018 The Author(s). Published by The Geological Society of London for GSL and EAGE. All rights reserved.
Accepted author manuscript, 293 KBLicence: Unspecified
Paper for Petroleum Geoscience - revisedAH-FW-10-mayAccepted author manuscript, 2.08 MB

Andrew Hurst
- School of Geosciences, Geology and Geophysics - Chair Of Energy Geoscience
Person: Academic

Cite this

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title = "Grain and pore microtexture in sandstone sill and depositional sandstone reservoirs: preliminary insights",

abstract = "Petrographical microtextural analysis and conventional core-plug analysis of samples from a depositional sandstone and a sandstone sill are used to compare with similar data derived from micro-CT (MCT) analysis of the same samples. A remarkable richness of information derived from the MCT data identifies isotropic granular and pore fabrics at the micrometre-scale in the sandstone sill that contrast markedly with the laminated fabric in the depositional sandstone. In the sandstone sill, porosity and permeability are more homogenous than in the depositional sandstone, in which lamination creates approaching two-orders of magnitude difference in permeability and enhances horizontal permeability relative to vertical permeability. In the sill, lower pore- and throat-shape factors and larger pore coordinate numbers are present than in the depositional sandstone. Preservation of the isotropic pore and grain structure in the sandstone sill is indicative of significant fluidized flow normal to the fracture margin during emplacement.",

author = "Feng Wu and Andrew Hurst and Antonio Grippa",

note = "We would like to express our gratitude to Dr Mehmet Kartal and Professor Dubravka Pokrajac for their help in micro-CT scanning and the use of Avizo software. We would like to thank Dr Giuseppe Palladino for the help in rock sample collection. We also very grateful to the anonymous reviewers for their valuable suggestions and the editors for their hard work, the feedback from them has led to considerable improvements in this manuscript.",

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AU - Wu, Feng

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AU - Grippa, Antonio

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PY - 2018/5/31

Y1 - 2018/5/31

N2 - Petrographical microtextural analysis and conventional core-plug analysis of samples from a depositional sandstone and a sandstone sill are used to compare with similar data derived from micro-CT (MCT) analysis of the same samples. A remarkable richness of information derived from the MCT data identifies isotropic granular and pore fabrics at the micrometre-scale in the sandstone sill that contrast markedly with the laminated fabric in the depositional sandstone. In the sandstone sill, porosity and permeability are more homogenous than in the depositional sandstone, in which lamination creates approaching two-orders of magnitude difference in permeability and enhances horizontal permeability relative to vertical permeability. In the sill, lower pore- and throat-shape factors and larger pore coordinate numbers are present than in the depositional sandstone. Preservation of the isotropic pore and grain structure in the sandstone sill is indicative of significant fluidized flow normal to the fracture margin during emplacement.

AB - Petrographical microtextural analysis and conventional core-plug analysis of samples from a depositional sandstone and a sandstone sill are used to compare with similar data derived from micro-CT (MCT) analysis of the same samples. A remarkable richness of information derived from the MCT data identifies isotropic granular and pore fabrics at the micrometre-scale in the sandstone sill that contrast markedly with the laminated fabric in the depositional sandstone. In the sandstone sill, porosity and permeability are more homogenous than in the depositional sandstone, in which lamination creates approaching two-orders of magnitude difference in permeability and enhances horizontal permeability relative to vertical permeability. In the sill, lower pore- and throat-shape factors and larger pore coordinate numbers are present than in the depositional sandstone. Preservation of the isotropic pore and grain structure in the sandstone sill is indicative of significant fluidized flow normal to the fracture margin during emplacement.

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DO - 10.1144/petgeo2017-027

M3 - Article

SN - 1354-0793

VL - 24

SP - 236

EP - 243

JO - Petroleum Geoscience

JF - Petroleum Geoscience

IS - 2

ER -

Grain and pore microtexture in sandstone sill and depositional sandstone reservoirs: preliminary insights

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