ASEAN Energy Security Shifts Toward Regional Grid Following Hormuz Supply Shock

The Association of Southeast Asian Nations (ASEAN) is accelerating the development of the ASEAN Power Grid to reduce structural dependency on Middle Eastern oil and gas.

The Impact of the Strait of Hormuz Closure

On February 28, 2026, a joint military offensive by the United States and Israel against Iran led to the rapid closure of the Strait of Hormuz. The International Energy Agency (IEA) described the resulting disruption as the largest supply shock in the history of the global oil market.

The crisis exposed deep structural vulnerabilities across Southeast Asia. In 2025, crude oil imports from the Middle East accounted for 56% of ASEAN’s total. The disruption created a “stagflationary bind” for regional central banks, as higher energy costs drove food inflation—which makes up 25% to 35% of ASEAN Consumer Price Index baskets—while simultaneously compressing household purchasing power.

Regional Vulnerability Spectrum

The energy crisis affected ASEAN member states unevenly based on their refining capacity and fiscal buffers. The spectrum of impact across the bloc:

• Acute Crisis: The Philippines declared a national energy emergency. Cambodia, Laos, Myanmar, and Timor-Leste faced direct humanitarian consequences due to a total lack of refining capacity and thin fiscal buffers.
• Fiscal Strain: Indonesia, despite being the region’s largest oil producer, saw fuel subsidies overshoot budget assumptions. Thailand and Vietnam faced acute supply and fiscal pressures.
• Managed Impact: Singapore utilized its reserve depth and trading sophistication to mitigate the shock.
• Revenue Shifts: Brunei and Malaysia experienced the crisis primarily in terms of revenue.

The ASEAN Power Grid as a Strategic Necessity

The volatility of imported fuels has transformed the ASEAN Power Grid from a regional ambition into an urgent strategic necessity. A connected regional grid reduces exposure to imported fuels, lowers system costs, and converts national energy diversity into a shared strategic advantage.

Realizing this vision requires three critical components: domestic grid readiness, modern market design, and tailored financing. By diversifying the energy mix and sharing resources, the bloc seeks to lower system costs and insulate economies from future geopolitical disruptions in the Gulf.

Diversification and Future Resilience

The Hormuz crisis has accelerated political momentum for energy diversification. The focus has shifted toward increasing the share of renewables and establishing more robust regional oil stockpiles to provide a buffer against future chokepoint closures.

While the global market in 2026 was projected to have a supply surplus of up to four million barrels per day, ASEAN struggled because the market lacked the specific grades of oil and gas delivered via the necessary routes at the required pace. This mismatch underscores the region’s need for internal energy autonomy and the infrastructure provided by the ASEAN Power Grid.