73 Works

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...

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.

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...

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.

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...

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...

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.

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...

Vaca Muerta FIB-SEM

Matthew Andrew
FIB-SEM data (voxel size 2.5nm x 2.5nm x 5nm) of the Vaca Muerta formation, Argentina.

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...

Characterization of Berezov Formation Rock Samples by Digital Core Analysis

Andrey Kazak & Svyatoslav Chugunov
The project summarizes activity for quantitative pore-scale characterization of a tight gas reservoir using digital rock physics (DRP) approach in the result of tight collaboration with NOCs and IOCs.

Micro-CT scCO2-Brine Data

Dustin Crandall Laura Dalton
These files are Berea and Mt. Simon sandstone micro-CT data sets at residual conditions from the paper Methods to Measure Contact Angles in scCO2-Brine-Sandstone Systems. They are 16-bit image stacks cropped from one larger sandstone micro-CT scans and are being provided for additional researchers to use manual and automated contact angle measurement methods to measure contact angles for a comparison to the paper results.

Digital Rendering of Sedimentary Relief Peels

Tip Meckel
Sedimentary-relief peels from field environments have been a primary observational technique for decades. Hundreds (likely thousands) of specimens of variable quality exist, representing a wide range of acquisition techniques, and depositional processes and sedimentary environments (e.g., Martinius and van den Berg, 2011). Peels are traditionally used to recognize and explain depositional processes and sedimentary textures qualitatively. This project is an effort to digitally capture sedimentary heterogeneity information represented by these unique specimens that are larger...

Gildehauser Sandstone

Steffen Berg, Ryan Armstrong & Andreas Weigmann
Micro-CT scans of a fast synchrotron-based micro-CT flow experiment performed in Gildehauser sandstone rock. The data set consists of - dry scan (at higher quality settings that the flow experiment itself) - dry scan segmented - time sequence of imbibition experiment (40 s time intervals), segmented into rock, oil and water phase

Fracture Patterns in Laminated Mancos Shale

Jeffery S. Luo, Mathew Ramos & D. Nicolas Espinoza
Mancos shale samples scanned pre and post-triaxial testing. Triaxial testing at various stress loading paths and confining pressures ranging from 100 to 500 psi. Three types of samples (Perpendicular Bedding- PD_ , Directional Bedding- 45_ , Parallel Bedding- PL_) Videos of fracture network visualization using Fiji/Image-J post-triaxial testing can be found here: https://www.youtube.com/playlist?list=PLv0npDbE5HXvEdptgajRDG3x-lwmtGDbr X-ray power ranging from 16.9 to 30.3 W. Copper filters used with thicknesses varying from 0 to 0.25 mm. Exact voltage and...

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.

4D Imaging of Acid Leaching in Porous Carbonado Diamond

Scott Eckley & Richard Ketcham
Porous carbonado diamonds were imaged in 3D using X-ray computed tomography before and after every step in a sequential acid digestion procedure. The resulting scans were registered to one another and masked to eliminate all exterior voxels (e.g. air, bag, and container). These images were then used to understand the effects of different acids on the pore-filling minerals. We were also able to assess how the nature of pore-filling material can affect measurements of porosity.

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.

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...

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.

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...

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

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...

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...

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...

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