X-ray Microtomography of Intermittency in Multiphase Flow at Steady State Using a Differential Imaging Method

The images in this dataset are a sample of Bentheimer Sandstone from a micro-computed tomography (micro-CT) scan acquired with a voxel resolution of 6.00µm. We imaged the steady state flow of brine and decane in Bentheimer sandstone. We devised an experimental method based on differential imaging to examine how flow rate impacts the pore-scale distribution of fluids during coinjection. This allows us to elucidate flow regimes (connected, or breakup of the nonwetting phase pathways) for a range of fractional flows at two capillary numbers, Ca, namely 3.0E-7 and 7.5E-6. At the lower Ca, for a fixed fractional flow, the two phases appear to flow in connected unchanging subnetworks of the pore space, consistent with conventional theory. At the higher Ca, we observed that a significant fraction of the pore space contained sometimes oil and sometimes brine during the 1 h scan: this intermittent occupancy, which was interpreted as regions of the pore space that contained both fluid phases for some time, is necessary to explain the flow and dynamic connectivity of the oil phase; pathways of always oil-filled portions of the void space did not span the core. This phase was segmented from the differential image between the 30 wt % KI brine image and the scans taken at each fractional flow. Using the grey scale histogram distribution of the raw images, the oil proportion in the intermittent phase was calculated. The pressure drops at each fractional flow at low and high flow rates were measured by high precision differential pressure sensors. The relative permeabilities and fractional flow obtained by our experiment at the mm-scale compare well with data from the literature on cm-scale samples.
Nenalezeno https://resources.bgs.ac.uk/images/geonetworkThumbs/76385908-22bc-74ee-e054-002128a47908.png
non geographic dataset
: http://data.bgs.ac.uk/id/dataHolding/13607382
English
Geoscientific information
GEMET - INSPIRE themes, version 1.0: BGS Thesaurus of Geosciences:
Porosity
Carbon capture and storage
NGDC Deposited Data
UKCCS
Free:
NERC_DDC
creation: 2018-09-20
2017-01-21 - 2017-02-08
Qatar Carbonates and Carbon Storage Research Centre
qccsrc@imperial.ac.uk
, United Kingdom
email: not available
Role: author
Qatar Carbonates and Carbon Storage Research Centre
qccsrc@imperial.ac.uk
, United Kingdom
email: not available
Role: point of contact
Imperial College London
Martin Blunt
London, United Kingdom
email: not available
Role: principal investigator
Imperial College London
Ying Gao
London, United Kingdom
email: not available
Role: point of contact

Data Quality

Rock Samples were obtained from the Bad Benthenium, Germany. These were scanned using a Zeiss Xradia VersaXRM-500 Micro-CT scanner at an actual voxel (pixel) size of 6.00um. The output images are in a proprietary TXRM dataset format and include the metadata relating to the image acquisition scanner settings e.g. voxel size. The details of the sample preparation and fluid injection strategy can be found in Gao et al. (2017). The Fluid configurations during steady state brine/decane fractional flow coinjection for a range of fractional flows at two capillary numbers, Ca, namely 3.0E-7 and 7.5E-6. The image size was 1004x1024x1016 voxels. After reconstruction, all the images were resampled using the Lanczos algorithm (Burger & Burge, 2016). The TXRM files were then processed using Zeiss’s XMReconstructor software to give a stack of image slices in another proprietary TXM format.
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk) for advice, should the position not be clear.

Metadata about metadata

76385908-22bc-74ee-e054-002128a47908
British Geological Survey
The Lyell Centre, Research Avenue South, EDINBURGH, EH14 4AP, United Kingdom
tel: +44 131 667 1000
email: enquiries@bgs.ac.uk
Role: point of contact
2024-03-25

Coupled Resource