The sample porous medium is from Mt. Simon sandstone at a depth of 6700 feet. The formation is located at verification well number 2 of a study site in Decatur, Illinois where Illinois State Geological Survey carried out a pilot injection study to better understand the feasibility of full-scale carbon capture and storage (Finley, 2014). A core plug from the formation was scanned by micro-CT imaging technique at the National Energy Technology Laboratory (NETL) of...
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...
A collaborative project for objective comparison of network generation algorithms for 3D tomographic data sets of porous media
Pore-scale digital images are usually obtained from micro computed tomography (micro-CT) data that has been segmented into void and grain space. Image segmentation is a critical process for digital rock analyses that can influence pore-scale characterisation studies and/or the numerical simulation of petrophysical properties. This project is to study on the sandstone micro-CT image segmentation by using convolutional neural network.
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...
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.
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...
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.
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.
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%.
Dataset: Sandstones (Bentheimer, Doddington, and Rotleigend) X-Ray Microscopy (XRM) is used to examine the intergranular pore structures in a series of sandstones. All three sandstone samples are imaged using a ZEISS Versa X-ray Microscope (XRM) (ZEISS X-Ray Microscopy, Pleasanton, CA). 3D volumes of the varying resolution are reconstructed from a series of 1600 projections, sequentially acquired at evenly spaced angular increments during a 360° rotation. Each projection consists of 1024 x 1024 pixels and is...
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...
Carbonate whole cores used to test new methodology for dual energy X-ray CT inversion.
This file contains X-ray computed microtomography (CMT) images used to analyze abiotic carbonate precipitation in porous media from a supersaturated solution. An X-ray transparent and rigid-walled polycarbonate column was developed to hold the sand pack tight during the carbonate precipitation process. The column consisted of a polycarbonate tube with an inner diameter of 3.18 mm, an outer diameter of 9.53 mm, and a height of 44.1 mm. Two polycarbonate discs and two stainless steel springs...
The modeling data contained herein corresponds to the following publication: Mehmani, Y., Tchelepi, H.A., "Minimum Requirements for Predictive Pore-Network Modeling of Solute Transport in Micromodels", Advances in Water Resources, (2017), http://dx.doi.org/10.1016/j.advwatres.2017.07.014 These include: =========== 1) STL files used in direct numerical simulations (DNS) 2) Pore networks extracted using the developed method therein (data + images) 3) Matlab script for plotting the pore networks 4) Predicted breakthrough curves (DNS and PNM) Definitions: ======== PNM = pore...
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...
This dataset contains raw and segmented X-Ray micro-tomography images from steady-state drainage and imbibition flow experiments in two distinct Bentheimer sandstones. The dataset is presented and utilised in the paper 'Representative elementary volumes, hysteresis and heterogeneity in multiphase flow from the pore to continuum scale' available at: https://eartharxiv.org/2aejr/. Full details of the experimental setup, procedure and imaging analysis can be found in the paper and supporting information. The experiments consist of steady-state co-injection core floods...
Dataset: Bentheimer networks Bentheimer is imaged by a ZEISS Versa X-ray Microscope (XRM) (ZEISS X-Ray Microscopy, Pleasanton, CA). A series of 1600 2D projections are acquired at regular angular increments over a 360° rotation. These reconstruct a series of 3D volumes: cylinders which are then cropped to the maximally inscribed cubes. 2D projections are 1024 x 1024 pixels, and 3D volumes are 1024 x 1024 x1024 voxels. Images are segmented by ZEISS Zen Intellesis machine...
We acquired micro-CT images from two carbonate outcrops (Indiana Limestone and Silurian Dolomite), and used it to calculate porosity at each voxel (the samples are considered pure, since Indiana Limestone is 99% calcite, and Silurian Dolomite, 97% dolomite). For thus, we segmented pores (porosity=100%) and 'solid' (porosity=5%) and used the grayscale of these two points to calculate porosity directly in the image. Since there is no voxel with 100% solid at the resolutions used, we...
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...
MicroCT images of residual CO2 trapping in oil wet sandstone.
Imaged data for the paper 'Stress Sensitivity of Fractured and Vuggy Carbonate' in volumetric tif format.
Sheared coal core: X-ray (100kV and 250µA), detector (7fps (frame per second) and average of 10 = exposure time per radiography of #1.4s), number of radiographies 1440 over 360°. Image: 1840x1840x1127 voxels, 16bit with a resolution (both voxel size and spot size) of 25µm. Reconstruction method: FBP (Filtered Back Projection) --> Feldkamp method (cone beam geometry) with Tukey filter. Device: Ultratom RXSolutions Operator: Nicolas Lenoir Facility Location: Laboratoire Navier
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...
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
The University of Texas at Austin3
Imperial College London3
Carl Zeiss Foundation2
Southern Methodist University2
University of Illinois at Urbana Champaign2
Los Alamos National Laboratory1
National Energy Technology Laboratory1
Federal University of Rio de Janeiro1
China University of Petroleum1
Edith Cowan University1