57 Works

Estaillades Carbonate #2

Tom Bultreys, Luc Van Hoorebeke & Veerle Cnudde
Estaillades carbonate is a mono-mineralic, calcitic rock, which contains two types of pores: intergranular macropores and intra-granular micropores. An Estaillades sample with a diameter of 7mm was scanned with UGCT’s HECTOR micro-CT scanner (developed in collaboration with XRE, www.xre.be). In this micro-CT scan, (most of) the intergranular macropores are resolved, while the micropores are not. A three-phase segmentation consisting of pore voxels, voxels with unresolved porosity, and solid voxels is provided. This image was used...

Two-Fluid Micromodel Experiments

James McClure
An experimental microfluidic approach based upon image analysis of nitrogen displacing decane in a 500 μm × 500 μm × 1.5 μm micromodel experiment. The pressures on the boundary of the cell were changed and the system was observed as it dynamically relaxed to an equilibrium state. These images capture microscale equilibrium configurations that can be used to determine fluid saturations, interfacial areas, and curvatures.

Unconsolidated muds from the Nankai Trough

Kitty L. Milliken, Masa Prodanovic, Michael Nole & Hugh Daigle
SEM images of pores in unconsolidated muds of Pleistocene to Miocene age drilled at Site C0002 by the Integrated Ocean Drilling Program (IODP) Expeditions 315 and 338. Samples in this project were prepared by Ar-ion milling then Ir-coated, and imaged on an FEI NovaNano SEM 430. This image set is used in the Nole et al. (2016) paper referenced in Publications tab. The table (.xlsx, .pdf format) attached to 2B 10R 3 origin data gives...

Wilcox Tight Gas Sandstone

Ayaz Mehmani, Masa Prodanovic & Kitty L. Milliken
A process-based multiscale network modeling approach is introduced to predict the drainage capillary pressure and relative permeability-wetting phase saturation curves at early cementation, final cementation and feldspar dissolution of the Wilcox tight gas sandstone. Predictions based on a two-scale analysis of an X-ray tomographic image are conducted as well but computational limitations make conclusions uncertain in this paper. We emphasize process-based modeling informed from thin sections as a cheap method of making a priori predictions...

Austin Chalk

Zoya Heidari & Artur Posenato Garcia

Meteorite NWA 2993: A primitive achondrite

Soheil Ghanbarzadeh & Masa Prodanovic
The microstructure of meteorite NWA 2993 which is a coarse-grained Lodran-like achondrite. This meteorite is a plutonic sample from the Winonaite parent body that has undergone partial melting and is comprised of orthopyroxene (37 vol.%), olivine (32 vol.%) and metal (31 vol.%).

Synthetic Rock Salt

Soheil Ghanbarzadeh, Marc A. Hesse, Masa Prodanovic & James E. Gardner
Deep geological storage sites for nuclear waste are commonly located in rock salt to ensure hydrological isolation from groundwater. The low permeability of static rock salt is due to a percolation threshold. However, deformation may be able to overcome this threshold and allow fluid flow. We confirm the percolation threshold in static experiments on synthetic salt samples with x-ray microtomography. We then analyze wells penetrating salt deposits in the Gulf of Mexico. The observed hydrocarbon...

Bentheimer Sandstone

Bagus Putra Muljadi
The effect of pore-scale heterogeneity on non-Darcy flow behaviour is investigated by means of direct flow simulations on 3-D images of Bentheimer sandstone and Estaillades carbonate. The critical Reynolds number indicating the cessation of the creeping Darcy flow regime in Estaillades carbonate is two orders of magnitude smaller than in Bentheimer sandstone, and is three orders of magnitude smaller than in the beadpack.

Naturally fractured coal sample

D. Nicolas Espinoza
Intact coal cores: X-ray (100kV and 250µA) with a 0.1mm filter of Cu to reduce beam hardening effect, detector (5fps (frame per second) and average of 10 = exposure time per radiography of #2s), number of radiographies 1440 over 360°. Image: 1634x1634x4115 voxels, 16bit with a resolution (both voxel size and spot size) of 25µm. Device: Ultratom RXSolutions Operator: Nicolas Lenoir Facility Location: Laboratoire Navier

Savonnières carbonate

Tom Bultreys, Jeroen Van Stappen, Tim De Kock, Wesley De Boever, Marijn A. Boone, Luc Van Hoorebeke & Veerle Cnudde
Savonnières limestone is a mono-mineralic, calcitic, layered oolithic limestone belonging to the Oolithe Vacuolaire (France). Its pore structure contains 4 types of porosity: inter-granular and intra-oolithic microporosity, and inter- granular and micro-connected macroporosity (hollow ooliths). The hollow ooliths are only connected to the other macro-pores by microporosity in the oolith-shells. Depending on local variations, the permeability ranges from 115 mD to more than 2000 mD (based on TinyPerm mini-permeameter measurements), and porosity ranges from 22%...

Particulate straining in carbonate proxy

Hasan Khan, Masa Prodanovic & David A. DiCarlo
This project presents particle straining in vuggy proxy media, where the media is a sintered glass bead (1.0 mm) core with dissolvable inclusion. Smaller sized glass bead particles (25 and 100 um) are injected in the proxy media to establish straining. Medical CT images of before and after injection are presented for 2 different flow rates (40 and 60 ml/min) and 3 different flow concentration (0.5%, 1% and 2%). The experiments are labeled according to...

Residual air in air/brine systems

Charlotte Garing, Marco Voltolini, Jonathan B. Ajo-Franklin & Sally M. Benson
The objective of this study was to obtain pore-scale images of residual gas in three different pore structures using X-ray computed microtomography in order to measure gas ganglia capillary pressures using air/brine interfacial curvature measurements. The present data set consists of raw images of air and brine after a gravity-driven imbibition in three samples: a glass bead pack, a Boise sandstone and a Fontainebleau sandstone, acquired with various resolution (2X - 4X/5X - 10X) leading...

Network Generation Comparison Forum

Adrian Sheppard & Gerd Schroeder-Turk
A collaborative project for objective comparison of network generation algorithms for 3D tomographic data sets of porous media

Gold grains scanned at various resolutions

Richard Ketcham
This project was to develop and test a method to measure the size and shape of particles that are small relative to the scan resolution, in a way that is accurate, reproducible, objective, and resolution-invariant. The scans are of an artificial core containing 12 gold grains embedded in quartz powder and epoxy (some iron filings are also mixed in), with sizes ranging from 100-300 microns (sphere-equivalent diameter), and a range of shapes. There are 12...

CO2-brine drainage in Berea (20 C, 10.3 MPa)

Xiongyu Chen & David A. DiCarlo
This project contains the steady-state water saturation images for five CO2-brine primary drainage experiments conducted in Berea sandstone at 20 C and 10.3 MPa

Bentheimer Micro_CT with Waterflood

Thomas Ramstad & Anders Kristoffersen
Micro CT images of waerflooding in a Bentheimer outcrop. 120 kV with 7 microns resolution. Dry scan of the core before flooding Scan after water flooding (at Sor state)

Supercritical CO2 - Brine Primary Drainages (40-60C, 8-12 MPa)

Xiongyu Chen, Shuang Gao, Amir Kianinejad & David A. DiCarlo
This project includes porosity images and steady-state water saturation images at 8 different positions (distance from inlet are 4, 12, 20, 28, 37, 44, 52 and 59 cm) along a 60-cm long Berea sandstone core (45 mD) during three primary drainage experiments conducted at 40C & 12 MPa, 40C & 8.3 MPa, and 60C & 12 MPa. The drainage experiment starts with injecting 1:1 volume ratio of CO2 and brine. After steady state is reached,...

Triaxial Direct-Shear In Situ Microtomography

Luke Frash, J.William Carey & Tim Ickes
We perform x-ray radiography and microtomography on rock specimens that are fractured at elevated confining stress conditions up to 30 MPa. We also concurrently measure stress and hydraulic conductivity. Metadata for this study is described in companion publications. LA-UR-18-27419. To read these *.npy files using python 2.7: " import numpy as np import pylab stack = np.load('BA01-05_3D_CT_python_array.npy') view = pylab.imshow(stack[300,:,:], cmap='gray') pylab.show() "

Massangis Jaune carbonate

Tom Bultreys, Marijn A. Boone, Tim De Kock, Geert De Schutter, Peter Vontobel, Luc Van Hoorebeke & Veerle Cnudde
The Massangis Jaune variety of the Massangis limestone (France) is an ooid-dominated grainstone containing detrital micrite and bioclasts. Within the bulk of this rock, patches of several cubic centimeters with a different microstructure and a lower porosity occur seemingly randomly (Boone et al., 2014). The bulk, from which the sample used in this work was selected, has a porosity of 11.6% (measured by mercury intrusion porosimetry (MIP) to avoid averaging the porosity of the bulk...

Pore‐scale Multiphase Flow Experiments in Bead Packs of Variable Wettability

Zuleima Karpyn
The aim of this experimental study is to investigate the impact of wetting characteristics on multiphase flow, sweep efficiency, and residual fluid distribution in unconsolidated porous media. A sequence of oil and water injections was performed on bead packs with uniform porosity and permeability, but different wettability characteristics. Uniform and mixed‐wet bead packs with varying degree of wettability were fabricated to analyze how the residual saturation profiles and the distribution of fluid phases at the...

Water-wet three-phase flow micro-CT tomograms

Alessio Scanziani, Kamaljit Singh & Martin Blunt
This dataset contains 3D images of a Ketton water-wet rock saturated with two or three phases (KI-doped brine, iododecane-doped decane and nitrogen). The images were obtained at two different resolutions (5 and 2 micrometres per voxel side) using a laboratory based X-ray micro-CT scanner. We provide raw data after each of the following injection steps: - dry image - oil injection in a fully brine saturated sample (OI) - first waterflooding (WF1) - gas injection...

Induced rough fracture in Berea sandstone core

Zuleima Karpyn, Christopher Landry & Masa Prodanovic
X-ray microtomography was used to map the internal structure of a rough fracture. The artificially created fracture was oriented parallel to the natural bedding of the rock.

Fines migration in sediments containing methane hydrate during depressurization

Han Gyeol & Tae-Hyuk Kwon
This project presents the X-ray CT image sets obtained during depressurization of methane hydrate bearing sediments. Particularly, the imaging experiment aims on quantifying the extent of fines migration in sediments containing some fines due to depressurization. In this study, three sediments were tested as follows: (a) Ottawa 20-30 sand with 9%w/w silica silt (b) F110 sand with 11.5%w/w silica silt (c) F110 sand with 6%w/w kaolinite and 4%w/w silica silt. These three are referred to...

A Multiscale Sandy Microstructure

Peyman Mohammadmoradi
Image stack of a multiscale microstructure including inter- and intragrain pore spaces. This project contains an image stack of 512 2D images creating a 3D multiscale sandy porous medium. The images are segmented with a resolution of 3 micrometers per pixel.

Statistically Generated Medium

Peyman Mohammadmoradi
Statistical concepts were applied to reconstruct a 3D medium using 2D thin section images.

Registration Year

  • 2015
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    11
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    19
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    1

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