Imperial College London
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ProfessorAnnMuggeridge

Faculty of Engineering, Department of Earth Science & Engineering

Consul for Faculty of Engineering and the Business School
 
 
 
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Contact

 

+44 (0)20 7594 7379a.muggeridge Website

 
 
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Location

 

2.38BRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Harris:2021,
author = {Harris, C and Jackson, S and Jones, A and Espie, T and Krevor, S and Muggeridge, A},
title = {The impacts of heterogeneity on CO<inf>2</inf> capillary trapping within the Captain Sandstone - a core to field scale study},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - To ensure storage security, it is vital we understand, and can effectively model, the physical and chemical trapping mechanisms for CO2 storage. A key trapping mechanism underpinning storage security and immobilising a significant proportion of the CO2 plume is capillary trapping. Capillary trapping is considered to be responsible for 90% of the storage capacity in saline aquifers in the US [1], the largest potential CO2 storage resource [2]. The ability to model and predict capillary trapping over large spatial scales in complex geological systems is essential to minimise risks and evaluate capacity. This paper investigates the effect of natural rock heterogeneities on capillary trapping across spatial scales in the Captain D Sandstone, from the Goldeneye formation, North Sea. That is, how heterogeneities affect CO2 saturation and distribution within rock core samples, and how those effects manifest, as a pseudo residual trapping, when upscaled to the field. A comprehensive dataset of 48 core plugs over a 65m interval have been studied. The location has industrial application as a target injection site for the discontinued Peterhead CCS project, with the aim to store 10 Mt CO2 over 10 years [3]. These results are also applicable to other storage sites of similar geology. We have carried out steady-state core flooding experiments using medical x-ray CT, providing a detailed characterisation of continuum multiphase flow properties, including residual trapping characteristics, over cm scales. The results show that individual core plugs exhibit a large range in apparent residual trapping at the centimetre scale which averages out over scales of 10s of cm's or greater. The average Land trapping value at the deca-centimetre scale is 1.7, however, at the cm scale, it varies between 0.8 and 2.8, representing a very large variation in locally trapped CO2. Consequently, at the plug scale for large initial saturations, approaching 1, the apparent residual saturation may vary
AU  - Harris,C
AU  - Jackson,S
AU  - Jones,A
AU  - Espie,T
AU  - Krevor,S
AU  - Muggeridge,A
PY  - 2021///
TI  - The impacts of heterogeneity on CO<inf>2</inf> capillary trapping within the Captain Sandstone - a core to field scale study
ER  -
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