What is energy security?
Defining energy security
The IEA defines energy security as “the uninterrupted availability of energy sources at an affordable price”. Energy security has many dimensions: long-term energy security mainly deals with timely investments to supply energy in line with economic developments and sustainable environmental needs. Short-term energy security focuses on the ability of the energy system to react promptly to sudden changes within the supply-demand balance. Lack of energy security is thus linked to the negative economic and social impacts of either physical unavailability of energy, or prices that are not competitive or are overly volatile.
In cases such as the international oil market, where prices are allowed to adjust in response to changes in supply and demand, the risk of physical unavailability is limited to extreme events. Supply security concerns are primarily related to the economic damage caused by extreme price spikes. The concern for physical unavailability of supply is more prevalent in energy markets where transmission systems must be kept in constant balance, such as electricity and, to some extent, natural gas. This is particularly the case in instances where there are capacity constraints or where prices are not able to work as an adjustment mechanism to balance supply and demand in the short term. Ensuring energy security has been at the centre of the mission of the IEA since its inception.
The ability to respond collectively in the case of a serious oil supply disruption with short-term emergency response measures remains one of the core activities of the IEA. The long-term aspect of energy security was also included in the Agency’s founding objectives, which called for promoting alternative energy sources in order to reduce oil import dependency. The IEA continues to work to improve energy security over the longer term by promoting energy policies that encourage diversification, both of energy types and supply sources, and that facilitate better functioning and more integrated energy markets.
Quantifying energy security
Historically, energy security was primarily associated with oil supply. While oil supply remains a key issue, the increasing complexity of energy systems requires systematic and rigorous understanding of a wider range of vulnerabilities. Disruptions can affect other fuel sources, infrastructure or end-use sectors. Thus, analysis of oil supply security alone is no longer sufficient for understanding a country’s energy security situation as a whole.
One of the ways in which the IEA is responding to this challenge is by developing a comprehensive tool to measure energy security. The IEA Model of Short-term Energy Security (MOSES) examines both risks and resilience factors associated with short-term physical disruptions of energy supply that can last for days or weeks. MOSES extends beyond oil to monitor and analyse several important energy sources, as well as the non-energy components (such as infrastructure) that comprise an energy system. Analysis of vulnerability for fossil fuel disruptions, for example, is based on risk factors such as net-import dependence and the political stability of suppliers. Resilience factors include the number of entry points for a country (e.g. ports and pipelines), the level of stocks and the diversity of suppliers.
Our work on Energy security
One of the IEA's core activities is ensuring the security of oil supplies by setting oil stockholding requirements for member countries and coordinating the international response to supply shocks
Natural Gas Security
Gas security challenges are evolving. The current period of gas oversupply – driven by overcapacity in the LNG market – should not overshadow the critical importance of global gas security
In May 2015, the Group of Seven (G7) Energy Ministers asked the IEA to help determine the best means of improving electricity security, including through increasing system flexibility
Member and Key Partner Emergency Policies
Since its founding in 1974, oil supply security has been a core mission of the International Energy Agency
The energy sector has to withstand demand or supply shocks in global energy markets, natural disasters, explosions or cyberattacks and other extreme events
In the event of an actual or potentially severe oil supply disruption, the IEA Secretariat first assesses its market impact and the need for an IEA co-ordinated response
Market Report Series: Oil 2017
Provides market analysis and forecasts to 2022
Gas Resiliency Assessment of Japan
Identify the natural gas supply security risks and challenges of Japan
Oil Information 2017
Detailed and comprehensive picture of oil supply, demand, trade, production and consumption
- WEO Analysis: A sea change in the global oil trade
23 February 2018
- Broadest ever participation in IEA emergency response exercise
12 February 2018
- Executive Director meets with Japan’s Minister of Economy, Trade and Industry
18 October 2017
Events & workshops
WorkshopFourth Annual Expert Workshop: Challenges in Electricity DecarbonisationOECD, Paris
Workshop7th Forum on the Climate-Energy Security Nexus: Enhancing Energy Sector Climate Resilience in AsiaManila, Philippines
WorkshopThe promise of fusion - innovation and the role of industryOECD Headquarters, 2 rue André-Pascal, 75016 Paris