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Geochemistry of CCS projects (EC032)
Course Summary
The geochemistry of saline aquifers, depleted oil/gas fields in the context of CO2, and other waste gas, injection is considered. The reactions of CO2 with different reservoir rocks and top-seals, and their constituent minerals, and the cement and metal work used in the construction of wells are central to this course. The course includes reference to numerous CCS and CO2-EOR case studies, CCS-pilot sites, experiments, geochemical modelling, reaction-transport modelling, monitoring of CCS sites, microbiological processes in CCS systems, and the risk of halite scale formation.
This course is designed for petroleum engineers, petrophysicists, and geoscientists who are working on CCS projects.
Available H2 2023
Course Details
Course duration and training method
Courses are accessed on the RPS Learning Hub, each course consists of a series of modules of up to 90 minutes learning time, including self-assessment elements. Learning materials are structured into short sections, each including interactive text and image content, animations, video and audio. An end of course quiz is scored to provide the learner with their learning progress.
Course Duration: 10 Hours
Learning outcomes
Participants will learn to:
- Establish the types and sources of information needed to define geochemical aspects of CCS sites.
- Examine the role of water and mineral composition, CO2 pressure, and composition of the injected gas in influencing reactions at CCS sites.
- Evaluate how experimental simulation can help define if mineral dissolution or precipitation will occur in CCS systems.
- Summarise CO2 interactions with cements and pipes used in well completions.
- Appraise how geochemical reaction modelling can help define what processes will occur over a range of timescales at CCS sites.
- Assess the application of reaction transport modelling to simulation of CO2 flow and reaction over a range of timescales at CCS sites.
- Correlate geochemical processes to geomechanical and petrophysical properties in CCS systems.
- Use geochemical tracers to track process in CCS systems.
Course content
The course will cover the following:
- What is carbon and capture and storage versus the concept of sequestration?
- What are the limits of geochemistry in CCS systems, as compared to petroleum systems?
- Sources of information on the geochemistry of CCS
- Injected gas compositions
- Forms of CO2 following injection - four modes described by IPCC
- Dissolution of CO2 in water
- CO2 and mineral dissolution and precipitation processes
- Reactions in sandstones and carbonates associated with CCS
- Reactions in top seals associated with CCS
- Reactions of CO2 with liners and other metal work during CCS
- Reactions with cement for completions and CO2 during CCS
- Microbiological processes induced by CCS
- Use of natural and artificial geochemical tracers
- Halite scale and formation damage induced by CCS
- Young basalt CCS and why it seems to work so well
- Summary of risks associated with geochemical processes in CCS sites