Geochemical interactions between supercritical CO2 and the Midale Formation. I: Introduction to fluid-rock interaction experiments

Rochelle, C.A.; Birchall, D.J.; Bateman, K.. 2002 Geochemical interactions between supercritical CO2 and the Midale Formation. I: Introduction to fluid-rock interaction experiments. Nottingham, UK, British Geological Survey, 36pp. (CR/02/289N) (Unpublished)

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Abstract/Summary

This report describes work undertaken at the British Geological Survey (BGS) that forms part of the international IEA Weyburn CO2 Monitoring and Storage Project. This project aims to monitor and predict the behaviour of injected CO2 into the Midale reservoir at the Weyburn oil field in southern Saskatchewan, Canada, using methods that include; time-lapse geophysics, modelling its subsurface distribution and migration, and simulating likely chemical interactions with the host rock. This report aims to provide a description of the laboratory experimental techniques that are being applied at the British Geological Survey to investigate the reactions between CO2 and various lithologies within the Midale formation. Later reports will detail the results of these experiments. The experimental study is being undertaken in the Hydrothermal Laboratory of the BGS, where various measurements are being taken. The techniques that will be used are based upon those used in previous CO2 projects (e.g. during the JouleII CO2 storage project [Holloway, 1996; Czernichowski-Lauriol et al., 1996], and during the SACS project [Rochelle et al., 2002]. This will hopefully allow for better intercomparison between the various studies. The experiments will utilise actual Midale core material from the Weyburn oil field, together with synthetic formation waters based upon measured compositions of samples at the well-head. The experimental conditions chosen for the investigation cover those representative of in-situ conditions (approximately 60°C, 150 bar [15 MPa]), as well as conditions at the bottom of injection wells where pressures might reach approximately 250 bar [25 MPa]. Experiment durations are planned to range from one week to 6 months. Experiments will be pressurised with either nitrogen or carbon dioxide. The former will provide a ‘non reacting’ reference point from which to compare the more reactive experiments containing CO2. However, it is hoped that they will also help to provide increased confidence in the understanding of the baseline conditions within the Midale formations prior to CO2 injection.

Item Type:	Publication - Report
Programmes:	BGS Programmes > Other
Funders/Sponsors:	British Geological Survey
Additional Information. Not used in RCUK Gateway to Research.:	This item has been internally reviewed, but not externally peer-reviewed.
Date made live:	24 Oct 2024 11:20 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/538293

Item Type:

Publication - Report

Programmes:

BGS Programmes > Other

Funders/Sponsors:

British Geological Survey

Additional Information. Not used in RCUK Gateway to Research.:

This item has been internally reviewed, but not externally peer-reviewed.

Date made live:

24 Oct 2024 11:20 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/538293