Reactions and Flow of CO2 Fluid in Compositionally Immature Sandstones
Compositionally mature sandstones, such as quartz arenite, are suited for CCS injection because the flow of injected CO2 is predictable. However, these reservoirs are not always ideally situated meaning that compositionally immature sandstones, such as arkose litharenite, may need to be utilised instead. These units are also attractive because the feldspars and clays that they contain react with and mineralise some of the injected CO2 within the decadal lifetime of a typical CCS project, and potentially increase its storage capacity. However, the products of these reactions may affect the adsorption and dissemination of the CO2 fluid within the reservoir and introduce considerable engineering challenges and uncertainty to flow models.
This project will use case studies from the North and Barents seas so that compositional factors controlled by provenance and burial diagenesis may be evaluated, and more widely, which of these drivers may be attributed to the presence of certain clays and feldspars that either exacerbate or buffer reservoir-CO2 fluid interactions.
Clay and feldspar compositions will be evaluated using the recently installed SEM facility at CASP.
The main objectives are to investigate
- The role of provenance in sub-basin compositional variation.
- Diagenetic reaction gradients and their impact on CO₂ fluid-reservoir interactions.
- Constraining multi-phase diagenesis events by dating authigenic apatite.
- Evaluate fluid flow through different reservoir compositions.
Contact(s): Michael Flowerdew
- How Projects are Designed
- Project History
- Black Sea Project 2019-2021
- Flood Basalt Impact on Hydrocarbon Systems Project 2019-2021
- Dinarides-Hellenides Project 2018-2020
- Late Cretaceous Arctic Source Rock Project 2018-2019
- Barents Shelf Provenance Project 2017-2019
- Uralian Provenance Project 2017-2019
- North Atlantic Margins Evolution Project (NAME) 2017-2019
- Flood Basalt Impact on Hydrocarbon Systems Project 2016-2018
- Black Sea Project 2016-2018
- Data Packages
- Virtual Outcrop Models
- Geological Collections and Data