Characterization of Pore Geometry of Indiana Limestone in Relation to Mechanical Compaction

A characterization of the dynamic interaction between an impacting tool and rock is presented. The analysis is based on the concept of rock fracture energy and on simple representations of the amount of fracturing and energy storage in the rock during fracture propagation. The governing equations are not complicated. They contain a small number of parameters and impose minimum restrictions on the form or sophistication of the model of the impacting tool. Simulation results are shown for bit-tooth drop tests on Indiana limestone under different values of the differential pressure across the rock face and for various heights of drop. The predicted dynamic force-penetration curves, force-time, displacement-time and velocity-time histories agree well with reported Laboratory data and demonstrate that the essential elements of tooth drop loading are adequately represented by the model.

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Characterization of Permeability for Solid Freeform Fabricated Porous Structures

10.1115/imece1999-1254 ◽

1999 ◽

Author(s):

Merve Erdal ◽

Levent Ertoz ◽

Selçuk Güçeri

Keyword(s):

Solid Freeform Fabrication ◽

Pore Geometry ◽

Fluid Viscosity ◽

Porous Structures ◽

Permeability Measurement ◽

Porous Flow ◽

Freeform Fabrication ◽

Fused Deposition ◽

Order Of Magnitude

Abstract Fused deposition based solid freeform fabrication technique allows manufacturing of potential functional preforms for subsequent Resin Transfer Molding. In this study, the transport property (permeability) of solid freeform fabricated porous preform geometries are investigated. Specifically the effect of pore geometry and network on the permeability is sought. Wet (saturated) permeability experiments were performed for various pore geometries with different viscosity liquids. For all fluids and preform structures investigated in this study, the porous flow exhibited Darcian behavior. The permeability is affected by changes in order of magnitude of fluid viscosity, the effect considerably significant in low porosity preforms. Current work concentrates on dry permeability measurement and development of numerical permeability models for ordered pore geometries (as produced through SFF) that will be compared with experimental results.

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Characterization of Pore Geometry in Limestones Using X-ray Computed Microtomography

78th EAGE Conference and Exhibition 2016 ◽

10.3997/2214-4609.201600892 ◽

2016 ◽

Cited By ~ 1

Author(s):

Y. Ji ◽

P. Baud ◽

T. Wong

Keyword(s):

Pore Geometry ◽

X Ray ◽

Computed Microtomography ◽

X Ray Computed

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Quantitative Characterization of 3D Pore Structure in Porous Limestone

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.1830 ◽

2013 ◽

Vol 671-674 ◽

pp. 1830-1834

Author(s):

Yun Tao Ji ◽

Patrick Baud ◽

Teng Fong Wong ◽

Li Qiang Liu

Keyword(s):

Pore Structure ◽

Morphological Processing ◽

Equivalent Diameter ◽

Micro Ct ◽

Quantitative Characterization ◽

3D Images ◽

Local Porosity ◽

Multi Level ◽

Indiana Limestone

The pore structure in intact and inelastically deformed Indiana limestone have been studied using x-ray microtomography imaging. Guided by detailed microstructural observations and using Multi-level Otsu’s thresholding method, the 3D images acquired at voxel side length of 4 μm were segmented into three domains: solid grains, macropores and an intermediate zone dominated by microporosity. Local Porosity can be defined to infer the porosity of each voxel. The macropores were individually identified by morphological processing and their shape quantified by their sphericity and equivalent diameter. With this segmentation, we obtained statistics on macropores on intact and deformed Indiana limestone which shows that inelastic compaction was followed by a significant reduction in the number of macropores. And also our results revealed the great potentiality to produce a quantitative analysis on porous material with the aid of micro CT images.

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Pore Structure Characterization of Indiana Limestone and Pink Dolomite from Pore Network Reconstructions

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles ◽

10.2516/ogst/2015004 ◽

2015 ◽

Vol 71 (3) ◽

pp. 33 ◽

Cited By ~ 12

Author(s):

Marina Freire-Gormaly ◽

Jonathan S. Ellis ◽

Heather L. MacLean ◽

Aimy Bazylak

Keyword(s):

Pore Structure ◽

Pore Network ◽

Structure Characterization ◽

Indiana Limestone

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Structural and thermodynamic properties of inhomogeneous fluids in rectangular corrugated nano-pores

Chinese Physics B ◽

10.1088/1674-1056/ac4237 ◽

2021 ◽

Author(s):

Yanshuang Kang ◽

Haijun Wang ◽

Zongli Sun

Keyword(s):

Free Energy ◽

Thermodynamic Properties ◽

Density Functional ◽

Pore Geometry ◽

Confined Fluids ◽

Functional Theory ◽

Slit Pores ◽

Geometric Elements ◽

Shed Light

Abstract Based on free-energy average method, an area-weighted effective potential is derived for rectangular corrugated nano-pore. With the obtained potential, classical density functional theory is employed to investigate the structural and thermodynamic properties of confined Lennard-Jones fluid in rectangular corrugated slit pores. Firstly, influence of pore geometry on the adsorptive potential is calculated and analyzed. Further, thermodynamic properties, including excess adsorption, solvation force, surface free energy and thermodynamic response functions are systematically investigated. It is found that pore geometry can largely modulate the structure of the confined fluids, which in turn influences other thermodynamic properties. In addition, the results show that different geometric elements have different influences on the confined fluids. The work provides an effective route to investigate the effect of roughness on confined fluids. It is expected to shed light on further understanding about interfacial phenomena near rough walls, and then provide useful clues for design and characterization of novel materials.

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