67 Works

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.

Grain Packing

Mohammad Saadatfar
Partially crystallized packings of frictional, equal-sized spheres. A batch of approximately 200,000 beads is poured into a cylindrical container forming an initial packing in a random configuration with a volume fraction ranging from 57% to 63%. The packing is then shaken intensely for few seconds, to the point of fluidization, where a fast compaction is observed. The resulting global packing density reaches 70.5%.

Pore habit of clathrate hydrate

Xiongyu Chen
This project includes high resolution images of three hydrate growth experiments. Data are from an accepted paper by Xiongyu Chen and D. Nicolas Espinoza published in Fuel in 2018, titled "Ostwald Ripening Changes the Pore Habit and Spatial Variability of Clathrate Hydrate" Exp1: Xenon hydrate growth inside an aluminum vessel half filled with pure water and half filled with xenon gas. T= 23 C, P_initial = 2.84 MPa. The image stack is taken with X-ray...

Fracture in granite

Richard Ketcham, Matthew Colbert, Jia-Qing Zhou & Bayani Cardenas
High-resolution X-ray CT scans and processing of fracture in granite for modeling 3D fracture flow. Primary fracture mapped using IPSF method.

Multiphase Flows in Sandstones

Anna Herring, Adrian Sheppard, Michael Turner & Levi Beeching
Three water-wet sandstone types (Bentheimer, Berea, and Leopard) at different multiphase (air and brine) saturation conditions; including dry (irreducible water saturation), and partially drained. Data was acquired at the Australian National University CTLab, and image processing was accomplished via Mango.

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...

A Micro CT image of Tight Carbonate

Peyman Mohammadmoradi
Micro-CT binarized image of a tight carbonate formation in middle east

Fluid Configurations in a Random Sphere Packing

James McClure
Two-fluid phase configurations in a periodic random close packing of spheres with porosity 0.369. This data set contains equilibrium fluid configurations obtained using the lattice Boltzmann method based on randomly initialized distribution of phases for a variety of fluid saturations. Data sets are labeled with the initial fluid saturation (sw_XX) and the whether a connected (a) wetting phase or (b) non-wetting phase was used to determine the initial fluid configuration. For additional details on the...

Finney packing of spheres

John L. Finney
A packing of equal spheres. The original data was experimentally measured in 1970, and this is one of the first sphere packings used as a representative porous medium (soil, and with some cementation modeling sandstone). We include original sphere locations (not image data, but with some effort can be used to produce a volumetric image at any resolution you would like), as well as a small selection of example discretization that have been used in...

Estaillades Carbonate

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 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. It is inferred from the examination of flow field features that the emergence of steady...

Biofilm Imaging in Porous Media by Laboratory X-ray Tomography: Combining a Non-Destructive Contrast Agent with Propagation-Based Phase-Contrast Imaging Tools

Maxence Carrel, Mario A. Beltran, Veronica L. Morales, Nicolas Derlon, Eberhard Morgenroth, Rolf Kaufmann & Markus Holzner.
X-ray tomography is a powerful tool giving access to the morphology of biofilms, in 3D porous media, at the mesoscale. Due to the high water content of biofilms, the attenuation coefficient of biofilms and water are very close, hindering the distinction between biofilms and water without the use of contrast agents. Until now, the use of contrast agents such as barium sulfate, silver-coated micro-particles or 1-chloronaphtalene added to the liquid phase allowed imaging the biofilm...

X-ray micro-tomography datasets of mixed-wet carbonate reservoir rocks for in situ effective contact angle measurements

Amer Alhammadi, Branko Bijeljic & Martin Blunt
Three high resolution X-ray micro-tomography datasets of carbonate reservoir rock samples obtained after 20 pore volumes of waterflooding at subsurface conditions. The three samples (Sample 1, Sample 2 and Sample 3) have been aged to restore the reservoir wetting conditions (mixed-wettability). The mixed wetting conditions have been characterized by in situ effective contact angle measurements using the automated algorithm developed by AlRatrout et al., 2017 applied on the segmented images. More details can be found...

Foamed Cement API RP 10B-4

Dustin Crandall, Samantha Fuchs, Magdalena Gill, Johnathan Moore & Barbara Kutchko
Computed Tomography images of foamed cement created using the American Petroleum Institute's Recommended Practice 10B-4. Two different sets of additives were used to make 10%, 20%, 30%, and 40% atmospheric foam cement.

Fractional-wet medium (OpenFOAM File)

Peyman Mohammadmoradi
2D fractional-wet medium including oil-wet and water-wet portions. The medium is meshed using COMSOL. The mesh file is converted to the OpenFOAM format using an in-house package. The attached file contains "constant" and "system" folders and the case can be easily customized for CFD-based studies using OpenFOAM.

Partially Cemented Tight Sandstone Fracture

Masa Prodanovic, Adenike Tokan-Lawal & Peter Eichhubl
X-ray microtomography image of partially cemented fracture from Travis Peak Formation in Texas, well SFOT #1, sample taken from depth of 10105ft.

Pore-scale images of trapped immiscible fluid structures in oil-wet and water-wet bead packs

Christopher Landry
The objective of this study was to obtain quantitative evidence of pore-scale immiscible fluid distribution in oil-wet and water-wet porous media using X-ray computed microtomography. Raw CMT image data sets for multiple flooding experiments using kerosene and brine are included for an oil-wet polyethylene bead pack, and a single imbibition/drainage cycle for a water-wet glass bead pack.

Particulate Straining in Simple Porous Media

Hasan Khan, Masa Prodanovic & David A. DiCarlo
A number of glass bead packs have been sintered to slightly consolidate them and create artificial rock samples with high porosity (~42%) and uniform grain size (~1 mm). One of the samples was imaged with x-ray microtomography, and the others were flooded with different suspensions. Core flooding has been done for different flow rates, concentrations and bimodal particle sizes and each sample and CT images were taken before and after each suspension flood.

Keathley Canyon 151 Sediment Cores

Dustin Crandall, Ann Cook, Emma Oti & Edwin Buchwalter
Medical CT scans of 38 cores from Site Keathley Canyon 151 in the northern Gulf of Mexico drilled by the Gas Hydrate Joint Industry Project led by Chevron in 2005. Please see Winters et al 2008 (https://doi.org/10.1016/j.marpetgeo.2008.01.018) for description of physical properties of sediments and drilling location. Samples were scanned at the National Energy Technology Laboratory in 2011 after hydrates had dissociated. The scans were collected using a Universal Systems 350 HD medical CT scanner...

Moura Coal

Ryan Armstrong & Peyman Mostaghimi
Two data sets are provided: 1- Dry image of the coal sample (NetCDF format - 1505x1497x80, 16 bit) 2 - Saturated with contrast agent (NetCDF format - 1505x1497x80, 16 bit) Both images are registered to each other.

Uniform quartz - Silver nanoparticle injection experiment

Ian Molnar
The dataset contains a series of SXCMT images of a sandy quartz media column during silver nanoparticle injection and elution from this media. The column was imaged 8 times during the silver nanoparticle transport experiment, and 4 images were captured at each time-step (at 4 different energies). Each set of 4 images were compiled to create 1 dataset of pore-scale silver nanoparticle concentration distribution for each time-step.

Fontainebleau 3D models

Carl Fredrik Berg
This is a set of 3D models resembling Fontainebleau sandstones. They were created using the commercially available software e-Core. We used identical grain sedimentation, compaction and diagenetic process parameters for seven model reconstructions. Porosity levels between 8% to 26% were obtained by only varying the amount of quartz cementation.

Bidisperse sphere packs generated under gravity

Hugh Daigle Abhishek Bihani
Bidisperse sphere packs were generated under the effect of gravity to model mudrocks and study the petrophysical properties consisting of small (clay) and large (silt) grains. Multiple, periodic, dense, bidisperse sphere packs were created with large grain volume concentrations (VL) increasing from 0 to 100 %. This was done for large to small grain radius ratios of 2:1, 5:1, 7:1, and 10:1 with constant sphere pack length 10 units in x, y, z directions. The...

Downscaling-based segmentation for unresolved images of highly heterogeneous granular porous samples

Ilenia Battiato Svyatoslav Korneev
We propose a simple and efficient algorithm of downscaling followed by segmentation to reconstruct the unresolved pore space from X-ray computed tomography (XCT) images of natural geological porous media columns. Contrary to widely employed single and multilevel threshold-based segmentation, the proposed method is based on a continuous map between pixel intensity and local pixel porosity that does not rely on the definition of arbitrary thresholds. The approach is used to generate a high-resolution binary image...

Registration Year

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