Methodologies and Technologies for Mitigation of Undesired CO₂ Migration in the Subsurface

Technical Report

1 December 2013

Jean-Charles Manceau, Dimitrios G. Hatzignatiou, Louis De Lary, Niels Bo Jensen, Kristin Flornes, Thomas Le Guenan, Arnaud Reveillere

Citation: IEAGHG, "Methodologies and Technologies for Mitigation of Undesired CO₂ Migration in the Subsurface", 2013-20, December 2013.

Download The Full Publication Now

Publication Overview

The driver behind this study is to develop a report built on the on the previous IEAGHG report on methods of leakage mitigation (2007/11). The proposed study should focus on current mitigation and remediation methods that may be applied or considered in site specific conditions in the event of unpredicted CO₂ migration. Each geological storage site will have an adaptive site specific monitoring plan, based on a risk assessment. Detection of a significant irregularity may involve supplementing the monitoring program, in order to detect a possible leak and if necessary engaging mitigation measures

Publication Summary

Migration of CO₂ can occur via engineered or natural pathways. Mitigation methods related to wells are the best established.
Measures related to natural pathways are likely to be via pressure management methods.
There are many novel technologies available, though current mitigation plans for existing projects include only mature technologies. However, mitigation plans should be flexible to take account of newer technologies when they become available and allow holisitic decision making
All mitigation and remediation plans should be site-specific and risk-based.

Download Publication

Access the complete publication in PDF format.

Download Now

Related Publications

View similar publications.

View All Publications

Technical Review

Risk Management and Monitoring Networks Combined Meeting Report

15 January 2026
Event Proceedings
Storage

Two IEAGHG expert networks, the Risk Management Network and the Monitoring Network, held a combined meeting from 27th to 28th August 2025 in The Hague, The Netherlands. Both networks have been convening for 20 years, and this meeting, hosted by Shell at the Shell Centre, represented the 11th Risk Management and the 15th Monitoring meeting.

Technical Report

CO2 Transport and Storage Availability

28 November 2025
Storage
Transport

The objective of this study is to investigate realistic rates of CO2 Transport and Storage operational availability that may be achievable for future systems, with a focus primarily on pipeline transportation and storage within sedimentary basins (saline aquifers and depleted fields).

Technical Report

CO2 Transport and Storage Cost Review

9 October 2025
Costs of CCUS
Storage
Transport

The objective of the study was to review publicly available information on CO2 transport and storage (T&S) costs, to provide insights into how typical cost estimates are built up and to inform on areas of risk. Current information on T&S costs and the need for new or improved data would be explored.

Technical Report

Review of CO2 storage via in-situ mineralisation in mafic-ultramafic rocks

22 August 2025
Storage

This report evaluates progress, barriers, and knowledge gaps, and provides stakeholders, regulators, and investors with a comprehensive summary of current knowledge and understanding of subsurface carbon mineralisation in mafic-ultramafic reservoirs.

Technical Report

Reviewing the implications of unlikely but potential CO2 migration to the surface or shallow subsurface

29 January 2025
Storage

CO2 leakage from geological storage is considered unlikely. However, it is important to understand environmental and health risks to ensure appropriate mitigation and monitoring is established.

Technical Review

7th International Workshop on Offshore Geologic CO2 Storage

23 January 2025
Event Proceedings
Storage

The 7th International Workshop on Offshore Geologic CO2 storage was held in Port Arthur, TX, on September 17-18th 2025.

Technical Report

Geological Storage of CO₂: Seal Integrity Review

10 September 2024
Storage

This comprehensive seal integrity review, undertaken by CO₂CRC on behalf of IEAGHG, provides a detailed, updated exploration of the critical aspects of seal potential in the context of the geological storage of CO₂.

Technical Review

Insurance Coverage for CO₂ Storage Projects

16 August 2024
Industry Insights
Storage

This report is a focused review of recent developments regarding insurance coverage for carbon dioxide (CO₂) geological storage projects. It seeks to address the following: what companies are offering or planning to offer insurance to CO₂ storage projects, what is the scope and duration of the coverage offered, and does coverage extend to the transportation of CO₂ to the project site? This work and report was prepared by Franz Hiebert.

Technical Report

Managing the transition of depleted oil and gas fields to CO₂ storage

12 August 2024
Policy & Regulation
Storage

This work provides a careful and thorough exploration of the major issues involved in the transfer of use of a field from hydrocarbon extraction to CO₂ storage, to identify both the pros and cons of such a transition.

Technical Review

CO₂ Storage Site Catalogue

8 August 2024
Storage

This Technical Review provides an overview of 22 CO₂ storage sites from around the world. These include CO₂-EOR, commercial scale storage sites and a number of pilot and demonstration storage sites in both depleted hydrocarbon reservoirs and saline reservoirs. Its primary aim is to provide a convenient source of collated information with a specific focus on technical information that are in the public domain.

Our most recent publications

Our authoritative, peer-reviewed publications cover topics that include carbon capture, transport, storage, monitoring, regulation, and more.

View All Publications

Technical Review

Risk Management and Monitoring Networks Combined Meeting Report

15 January 2026
Event Proceedings
Storage

Technical Report

CO2 Transport and Storage Availability

28 November 2025
Storage
Transport

Technical Review

1st Meeting of the Network of National CCUS Centres of Excellence (NNCCE)

3 November 2025
Event Proceedings

The inaugural meeting of the Network of National CCUS Centres of Excellence (NNCCE) was held virtually on 30 July 2025, bringing together over 20 representatives from leading CCUS institutions across the Global South.

Technical Review

Artificial Intelligence in Carbon Capture, Utilisation, and Storage 2025 Workshop

30 October 2025
Event Proceedings
Industry Insights

The IEAGHG AI in CCUS Workshop, held virtually on 29–30 April 2025, was convened to foster a deeper understanding of the role artificial intelligence (AI) can play in advancing carbon capture, utilisation and storage (CCUS).

Technical Report

CO2 Transport and Storage Cost Review

9 October 2025
Costs of CCUS
Storage
Transport

Technical Review

Proceedings of the CCS Cost Network 2025 Workshop

1 October 2025
Costs of CCUS
Event Proceedings

IEAGHG’s 8th CCS Cost Network Workshop, hosted by Bechtel at their Energy Headquarters in Houston, the so-called Energy Capital of the World, took place on March 5–6, 2025. This invitation-only, in-person gathering convened around 50 leading experts from industry and academia, fostering a highly interactive forum for in-depth discussions on advancing real-world cost estimation across the CCS value chain. The workshop was opened with welcoming remarks from Bechtel’s Bill Elliot, Operations Manager, ET, and George Whittaker, CCUS Operations Manager, which set the scene for a workshop focused on sharing expertise, challenging assumptions, and identifying practical pathways to lower CCS costs.

Technical Report

Market Models for CCUS/CDR – A Global Screening

10 September 2025
Industry Insights
Policy & Regulation

This report provides a key pillar to interested parties including policy makers, regulators, and the technical carbon capture, utilisation and storage (CCUS) / carbon dioxide removal (CDR) community on potential successful market strategies, including their pros and cons and their suitability for dierent economic and political realities, which may lead to the fast development of an efficient, safe, and accepted CCUS/CDR market sector.

Technical Report

CO2 Flow Metering Technologies

4 September 2025
Policy & Regulation
Transport

The main objective of this study is to raise awareness of the relevance, state of the art, challenges and opportunities of flow metering for carbon capture, utilisation and storage (CCUS). Flow metering of CO2 streams will be critical in supporting trade, protecting consumers, ensuring confidence, facilitating taxation, and meeting CO2 reduction goals and treaty obligations.

Technical Report

The Value of Direct Air Carbon Capture and Storage (DACCS)

4 September 2025
Capture

The aim of this study is to evaluate the value of direct air capture and storage (DACCS) in the energy transition (down to the regional level), accounting for key factors, including carbon removal eiciency, timeliness, durability, land footprint and techno-economic performance.

Technical Report

Review of CO2 storage via in-situ mineralisation in mafic-ultramafic rocks

22 August 2025
Storage

Get the latest CCS news and insights

Get essential news and updates from the CCS sector and the IEAGHG by email.

Can’t find what you are looking for?

Whatever you would like to know, our dedicated team of experts is here to help you. Just drop us an email and we will get back to you as soon as we can.