• NERC Data Catalogue Service
  •  
  •  
  •  

The impact of mineral dissolution on drainage relative permeability and residual trapping in two carbonate rocks

Carbon dioxide (CO2) injection into deep saline aquifers is governed by a number of physico-chemical processes including mineral dissolution and precipitation, multiphase fluid flow, and capillary trapping. These processes can be coupled, however, the impact of fluid-rock reaction on the multiphase flow properties is difficult to study and is not simply correlated to variation in rock porosity. We observed the impact of rock mineral dissolution on multiphase flow properties in two carbonate rocks with distinct pore structures. The Ketton carbonate was an ooidal limestone with a distinct bimodal pore structure whereas the Estaillades limestone was a bioclastic limestone with a wide range of pore sizes. Observations of steady state N2-water relative permeability and residual trapping were obtained at 100 bars fluid pressure and 22°C, with X-ray tomography used to estimate fluid saturation. These tests alternated with steps in which mineral was uniformly dissolved into solution from the rock cores using an aqueous solution with a temperature controlled acid. Eight alternating sequences of dissolution and flow measurement were performed, with on average 0.5% of the mass of the rocks dissolved at each stage. A sequence of mercury injection capillary pressure measurements were conducted on a parallel set of samples undergoing the same treatment to characterize the evolving pore size distribution and corresponding capillary pressure characteristics. Variations in the multiphase flow properties were observed to correspond to the changes in the underlying pore structure. In the Ketton carbonate, dissolution resulted in an increase of the fraction of pore volume made up by the smallest pores and a corresponding increase in the fraction made up by the largest pores. This resulted in a systematic increase in the relative permeability to the nonwetting phase and decrease in relative permeability of the wetting phase. There was also a modest but systematic decrease in residual trapping. In the Estaillades carbonate, dissolution resulted in an increase in the fraction of pore volume made up by pores in the central range of the initial pore size distribution, and a corresponding decrease in the fraction made up by both the smallest and largest pores. This resulted in a decrease in the relative permeability to both the wetting and nonwetting fluid phases and no discernible impact on the residual trapping. In summary, the impact of rock matrix dissolution will be strongly dependent on the impact of that dissolution on the underlying pore structure of the rock. However, if the variation in pore structure can be observed or estimated with modelling, then it should be possible to estimate the impacts on multiphase flow properties.

Simple

Date (Creation)
2016-01-01
Identifier
http://data.bgs.ac.uk/id/dataHolding/13607386
Point of contact
  Imperial College London - Sam Krevor
United Kingdom
Principal investigator
  Imperial College London - Sam Krevor
United Kingdom
Author
  Qatar Carbonates and Carbon Storage Research Centre - qccsrc@imperial.ac.uk
United Kingdom
Point of contact
  Qatar Carbonates and Carbon Storage Research Centre - qccsrc@imperial.ac.uk
United Kingdom
Maintenance and update frequency
notApplicable notApplicable
GEMET - INSPIRE themes, version 1.0
  • Geology
BGS Thesaurus of Geosciences
  • NGDC Deposited Data
  • Petrophysics
  • UKCCS
  • Carbon capture and storage
dataCentre
  • NGDC Deposited Data
  • UKCCS
Keywords
  • NERC_DDC
Access constraints
otherRestrictions Other restrictions
Other constraints
intellectualPropertyRights
Other constraints
Either : (i) the dataset has not been formally approved by BGS for access and use by external clients under license; and / or (ii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted before the dataset can be provided to, or accessed by, BGS staff or external clients. 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 access restrictions. This staff member should revert to the IPR Section (IPR@bgs.ac.uk) for advice, should the position not be clear.
Use constraints
otherRestrictions Other restrictions
Other 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.
Other constraints
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 language
EnglishEnglish
Topic category
  • Geoscientific information
Begin date
2016-01-01
End date
2017-01-01
Supplemental Information
Niu, Krevor. (in review)

Reference System Information

No information provided.
Distribution format
  • Dicom ()

OnLine resource
http://www.bgs.ac.uk/ukccs/accessions/index.html#item120231
OnLine resource
Digital Object Identifier (DOI)
Hierarchy level
nonGeographicDataset Non geographic dataset
Other
non geographic dataset

Conformance result

Date (Publication)
2011
Explanation
See the referenced specification
Pass
No

Conformance result

Date (Publication)
2010-12-08
Explanation
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
Pass
No
Statement
The details of the sample preparation and fluid injection strategy can be found in Niu, Krevor. (in review).
File identifier
77f2eedf-d58c-5ad3-e054-002128a47908 XML
Metadata language
EnglishEnglish
Hierarchy level
nonGeographicDataset Non geographic dataset
Hierarchy level name
non geographic dataset
Date stamp
2025-05-07
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  British Geological Survey
The Lyell Centre, Research Avenue South , EDINBURGH , LOTHIAN , EH14 4AP , United Kingdom
+44 131 667 1000
Dataset URI
http://data.bgs.ac.uk/id/dataHolding/13607386
 
 

Overviews

overview

Spatial extent

Keywords


Provided by

logo

Share on social sites

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •