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Discover the latest advances carbon capture and storage research
The study took as its starting point, IEA GHG Report on PH3/23 undertaken in 2000 as its base line data set. The study was to assess the data within the report and determine whether there was newer data on issues, (e.g. CO<sub>2</sub> use/bbl oil produced in EOR floods) that could be used to revise global estimates.
The work carried out included the following key elements: a review of the international terminology and regulations with a focus on public health and engineering systems risk assessment and management; a compilation of generic and specific terminology for risk assessment and management relevant for CO₂ geological storage; a formal report of the methods used, results and conclusions.
This was the 5th meeting of the IEA Greenhouse Gas R&D Programme (IEA GHG) Monitoring Network. Since the inception of the Monitoring Network a significant amount of work has been done in this field. There are now a great number of very elaborate Carbon Capture and Storage (CCS) demonstration projects occurring worldwide with each one developing and testing new monitoring techniques. While this is happening there is also a great drive from many Governments to put in place the regulations needed to properly licence and supervise CCS activities. This meeting hoped to review where we are with both aspects of CCS and identify what questions still need to be answered
The IEA Greenhouse Gas R&D Programme (IEA GHG) commissioned the Energy and Environmental Research Centre (EERC), from the University of North Dakota, to undertake a study to develop storage coefficients for carbon dioxide (CO<sub>2</sub>) storage in deep saline formations. The project was co-sponsored by the US Department of Energy (US DOE).
The IEA Greenhouse Gas R&D Programme (IEA GHG) has undertaken an assessment of the learning that is being provided by operational, large-scale, pilot, demonstration and commercial CCS projects around the world. This was undertaken by questionnaire and analysis of the responses. From the analysis of the responses, key themes, learning points and areas for beneficial collaboration are identified. The extent of coverage of projects is summarised in terms of geological properties and monitoring techniques. From this initial analysis, a number of key learning areas have been identified that also warrant further investigation. These include: <!-- wp:acf/columns {"name":"acf/columns","data":{"padding_top":"1","_padding_top":"field_columns_fields_padding_top","padding_bottom":"1","_padding_bottom":"field_columns_fields_padding_bottom","margin_top":"0","_margin_top":"field_columns_fields_margin_top","margin_bottom":"0","_margin_bottom":"field_columns_fields_margin_bottom"},"mode":"preview"} --> <!-- wp:acf/column-content {"name":"acf/column-content","mode":"preview"} --> <!-- wp:list --><ul> <!-- wp:list-item --><!-- wp:list-item --><li>Effectiveness of various monitoring techniques</li><!-- /wp:list-item --><!-- /wp:list-item --> <!-- wp:list-item --><!-- wp:list-item --><li>Injectivity – prediction, restoration and enhancement</li><!-- /wp:list-item --><!-- /wp:list-item --> <!-- wp:list-item --><!-- wp:list-item --><li>Design to avoid hydrate formation</li><!-- /wp:list-item --><!-- /wp:list-item --> <!-- wp:list-item --><!-- wp:list-item --><li>Performance of materials in CO<sub>2</sub> environments</li><!-- /wp:list-item --><!-- /wp:list-item --> <!-- wp:list-item --><!-- wp:list-item --><li>Scaling up capture train size</li><!-- /wp:list-item --><!-- /wp:list-item --> <!-- wp:list-item --><!-- wp:list-item --><li>Wells – designing, placing, and monitoring cementation</li><!-- /wp:list-item --><!-- /wp:list-item --> </ul><!-- /wp:list --> <!-- /wp:acf/column-content --> <!-- /wp:acf/columns -->
The fourth IEA GHG Risk Assessment Network Meeting was held on the 16th—17th April 2009 in Melbourne, Australia, and hosted by CO₂CRC. Cliff Kavonic of Victorian Department of Primary Industries gave the official welcome. The Victorian Government was that day publishing a report by Geoscience Victoria on the storage potential in the Gippsland basin in south Victoria. The fifty six attendees enjoyed the discussions based around the six sessions. These were on reports from other initiatives, leakage impacts, combining monitoring with modelling and risk assessment, insurance and risk, risk communication, and updates from real projects.
This report focuses on potential hazards to geological storage of CO₂ related to previously abandoned deep oil and gas wells. As many prospective CO₂ storage projects will be situated in mature sedimentary basins, these operations need to accommodate previously drilled and abandoned wells. The current study aims to provide a high order evaluation of abandoned wells and their suitability to CO₂ storage operations. To this purpose an overview of the current state of knowledge on potential degradation mechanisms of typical well materials (i.e. cement and steel) is presented. Several case studies are described, illustrating some typical aspects associated with abandoned wells in the context of geological storage of CO₂. Furthermore, a geographical overview of numerous well abandonment regulations is provided, reflecting significant differences in regulatory demands around the world. Moreover, both abandonment regulations and practices historically gradually developed to the present high standards. As a consequence, especially older wells are considered to be a potential threat to long term storage integrity. Various risk assessment methodologies are described that are tailored to well integrity evaluation for geological CO₂ storage. Finally, an overview of potential corrective measures and monitoring strategies is presented.
The IEA GHG Wellbore Integrity Network has been running for 5 years now, and the meeting in 2009 was held in Calgary, Canada. The attendance for the meeting covered the usual mix of industry, academia, research and regulators, but there was a noted increase in attendance from industrial companies. This was demonstrative of the local area that the meeting was held in, with a large number of oil companies working in the surrounding province. This increased industry representation moved the discussion sessions to areas previously not addressed, or only addressed in brief outline, and this is indicative of the progress of the meeting and its continued worth. A possibility for the future of the network will be an alteration in its role, from pure research into wellbore integrity, materials and abandonment procedures, to one of education of industrial operators, and the broaching of the gap between experience gained from the oil and gas industry, and the needs and demands of regulations relating to CO<sub>2</sub> Capture and Storage (CCS) operations.
Within the next few years it is expected that an increasing number of commercial-scale demonstrations of CO<sub>2</sub> capture and storage technology will be built and brought into operation. Many aspects of the design of such facilities including issues relating to engineering design, environmental impacts, standards and permitting have been the subject of studies undertaken for the IEA GHG. So far no study has been dedicated specifically to the issue of safety in the above ground elements of CCS systems although such safety issues have been addressed to some extent in earlier studies. This study was designed specifically to examine the safety issues which are likely to arise when preparing safety cases and planning emergency procedures for CO<sub>2 </sub>capture and storage (CCS) projects
IEA GHG has produced a revised set of criteria for assessment of plants, particularly power plants with CO₂ capture, making use of information from EPRI and others. The revised criteria should be used by IEA GHG for its future studies. Other organisations are encouraged to use the criteria to provide consistency of results. Preliminary criteria have been specified for alternative locations and these should be finalised with local organisations at the time when IEA GHG undertakes its first study for each alternative location. Other alternative locations could be considered in future, at the request of IEA GHG's members. As a follow on to this report IEA GHG will assess the feasibility of providing standard assessment criteria for CO₂ transport and storage and it will develop methodologies for comparing the relative merits of CCS and alternative low-CO₂ technologies.
The concept of this workshop was previously proposed to the IEA Greenhouse Gas R&D Programme (IEA GHG) by BRGM and Schlumberger, and following the approval of the workshop in principle, discussion was initiated in June 2008 at the IEA GHG Joint Network Meeting in New York. The suggestion was that CO₂ geological modelling for Carbon Dioxide Capture and Storage (CCS) was an important topic not being adequately dealt with by the existing storage based research networks. Further discussions by these network groups concluded that this was indeed a gap, and that an initial workshop should be held to determine the viability of forming a separate network dealing solely with geological storage modelling.
The initial specification required a desk-based study to: 1. Assess the future implications for CO₂ storage of future natural gas production trends, especially the potential future exploitation of fields with naturally-high CO₂ 2. Undertake a source-sink matching exercise, utilising the IEA GHG database on point source emissions and with due consideration to existing transport pipeline infrastructure. The specification specifically stated that ship transportation should not be considered; content; 3. Determine the potential role of enhanced gas recovery (CO₂-EGR) in CO₂ 4. Develop an analytical screening process/tool for the selection of gas fields suitable for CO storage; 2 storage, allowing ranking of opportunities and assessment of potential global CO₂ 5. Estimate CO storage capacity; 2 6. Provide a summary of opportunities around the world where CO storage costs in depleted gas fields; 2 storage in depleted gas fields could be feasible from both technological and economic perspectives
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