“Master Planning,” aiming to provide an overall picture of the CCS project, summarizes the CO2 underground storage project implementation scheme, project implementation plan, and other important requirements including related laws and regulations, economic feasibility, uncertainties, risk management, and public acceptance.
Practical Guidance for
Please click here to download the Japanese Practical Guidance for Geological CO2 Storage.
The Geological Carbon Dioxide Storage Technology Research Association is committed to developing comprehensive analysis and evaluation of storage reservoirs, CO2 monitoring technology using optical fibers, social consensus building methods, and so on to commercialize CO2 underground storage technology, and has compiled the knowledge and results obtained to date, as well as technical information and case studies of CCS projects in the “Practical Guidance for Geological CO2 Storage” CCS project personnel can refer to. In addition to the case studies of large-scale CCS projects, such as Quest in Canada and Sleipner in Norway, the Practical Guidance also includes the results of the “development of CO2 underground storage and sequestration technologies” (Nagaoka CO2 pilot-scale injection tests (2000-2007)) and the “CCS large-scale demonstration test project in Tomakomai” (2012-2019) that were implemented domestically.
This technical case study collection comprises eight phases from Phase 1 “Overview of Geological CO2 Storage” to Phase 8 “Post-closure site care,” which is reader-friendly and follows the flow of CCS projects.
To download the technical case study collection, click the icon of each Phase.
You will be directed to the download site.
Practical Guidance for Geological CO2 Storage
- Description
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Phase 1 Overview of Geological CO2 Storage
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Phase 2 Site selection
Based on existing geological information, candidate sites which satisfy the requirements for a CO2 storage site are selected. Multiple candidate sites need to be selected as there are uncertainties about storage capacity, safety, and economic feasibility due to insufficient information at this stage.
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Phase 3 Site characterization
For the candidate sites selected, detailed evaluations are performed as a storage site. Geological modeling is developed, and an evaluation of storage capacity, risk assessments from a geological perspective, and a study of injection specifications are performed. Also, a conceptual design of facilities is developed, and a rough evaluation of its economic feasibility is conducted.
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Phase 4 Implementation Plan
A specific implementation plan is then drawn up for the selected injection site. The plan describes not only the project outline, schedule, CO2 transportation, well-drilling, CO2 injection, monitoring, and plans for the transfer of responsibilities after the site’s closure, but also the requirements for economic feasibility, risk management, and public acceptance. After development of the implementation plan, a final investment decision is made on the project.
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Phase 5 Design and Construction
CO2 transportation facilities and CO2 injection facilities, as well as monitoring-related facilities are designed in detail and constructed. After construction, performance validation is conducted to confirm that the CO2 reaches the injection well as designed. Case studies of procedures necessary for work implementation are also introduced with reference to domestic and overseas CCS guidelines and related laws and regulations.
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Phase 6 Operation and Management
Injection operations are conducted in accordance with the implementation plan. The distribution of the CO2 that has been injected, and any pressure changes in the reservoir are monitored, and geological modeling is improved to increase the accuracy of predictions of long-term CO2 behavior if any deviation from predicted behavior is found. In addition, monitoring is conducted for CO2 leakage.
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Phase 7 Site Closure
After completing the CO2 injection, the injection well is abandoned and the injection facilities and transportation-related equipment are removed, except for those necessary for post-closure monitoring. The site is returned to the owner after restoring it to its original state.
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Phase 8 Post-closure Management
After site closure, monitoring is continued for the purposes of understanding CO2 behavior and monitoring for leakage. Although the duration of monitoring is determined by laws and regulations, management responsibility for the site is transferred to a public organization after safety is ensured by monitoring for a specific period of time.
