ISO/TC 265/WG 3 - Storage

This document covers: — A description of the existing legal frameworks and associated laws and directives covering current and planned projects. — Specific information about CO2 injection facilities based on existing and planned projects that include storage of CO2 in both saline aquifers and CO2-EOR as relevant. This information includes aspects of materials used, surface infrastructure, well design considerations, concepts around well placement strategies, considerations for downhole monitoring tool deployment, well completions, and well and infrastructure maintenance and remediation practices. — Descriptions of current practices regarding operating projects including monitoring, safety, and reporting activities associated with both surface and downhole components of the projects. — Discussion on operational aspects of storing CO2 in hydrocarbon reservoirs including depleting gas fields and reusing facilities. — A description of monitoring requirements and methods including measurements to establish baselines. — A description of existing and emerging tools, accuracy, and expectations for quantification. — A description of regulatory requirements for operating and decommissioning CO2-EOR with associated storage and CCS projects around the world. — A description of decommissioning activities and timelines associated with end-of-project.

ISO 27914:2017 a) establishes requirements and recommendations for the geological storage of CO2 streams, the purpose of which is to promote commercial, safe, long-term containment of carbon dioxide in a way that minimizes risk to the environment, natural resources, and human health, b) is applicable for both onshore and offshore geological storage within permeable and porous geological strata including hydrocarbon reservoirs where a CO2 stream is not being injected for the purpose of hydrocarbon production or for storage in association with CO2-EOR, c) includes activities associated with site screening and selection, characterization, design and development, operation of storage sites, and preparation for site closure, d) recognizes that site selection and management are unique for each project and that intrinsic technical risk and uncertainty will be dealt with on a site-specific basis, e) acknowledges that permitting and approval by regulatory authorities will be required throughout the project life cycle, including the closure period, although the permitting process is not included in ISO 27914:2017, f) provides requirements and recommendations for the development of management systems, community and other stakeholder engagement, risk assessment, risk management and risk communication, g) does not apply to, modify, interpret, or supersede any national or international regulations, treaties, protocols or instruments otherwise applicable to the activities addressed in ISO 27914:2017, and h) does not apply to or modify any property rights or interests in the surface or the subsurface (including mineral rights), or any pre-existing commercial contract or arrangement relating to such property. The life cycle of a CO2 geological storage project covers all aspects, periods, and stages of the project, from those that lead to the start of the project (including site screening, selection, characterization, assessment, engineering, permitting, and construction), through the start of injection and proceeding through subsequent operations until cessation of injection and culminating in the post-injection period, which includes a closure period. Figure 1 illustrates the limits of ISO 27914:2017.