Natural gas is one of the most important fuels in Thailand’s energy system, but the structure of the sector is changing. For decades, Thailand relied heavily on domestic offshore gas production from the Gulf of Thailand, along with pipeline imports from Myanmar. That model gave the country a relatively stable fuel base for electricity generation, industry, and transport. Today, Thailand is moving into a more import-dependent phase as older offshore fields decline and liquefied natural gas becomes a larger part of the supply mix.
This shift matters because natural gas is not a small side fuel in Thailand. It is deeply tied to the country’s electricity system, industrial competitiveness, and household power costs. The International Energy Agency notes that Thailand’s energy policy is focused on reducing dependence on natural gas in order to improve energy security, especially as lower-cost renewable energy begins to change the economics of power generation.
Thailand’s natural gas story is therefore not simply about production. It is about whether the country can manage a transition from a domestic-gas-based system to one that uses more LNG without exposing consumers and industries to excessive fuel-price volatility.
The Gulf of Thailand Still Matters, but Domestic Gas Is No Longer Enough
Thailand’s domestic natural gas production has historically come from offshore fields in the Gulf of Thailand, including major producing areas that supplied power plants and industrial users for many years. These fields helped make gas the backbone of the national electricity system. They also reduced Thailand’s need to rely entirely on imported fuel.
That advantage has weakened. Production from mature offshore areas has declined, and Thailand has had to rely more heavily on LNG imports to fill the gap. Energy Tracker Asia reported that Thailand’s reliance on domestic natural gas fell from 79.4% in 2011 to 59.84% in 2024, while LNG rose from 2.18% to 29.07% of total gas supply over the same period. The same analysis reported that Thailand’s average pool gas price increased from THB 221.13 per million BTU in 2011 to THB 308.60 per million BTU in 2024, reflecting the cost impact of greater LNG dependence.
The Erawan field remains especially important because its output affects the amount of LNG Thailand must buy. When domestic production improves, short-term LNG demand can ease. Kasikorn Research projected that LNG imports would decline in 2025 partly because the Erawan field was expected to operate at full capacity through the year, reducing the need for additional spot-market LNG purchases.
This makes domestic gas production a continuing energy-security issue. Even if Thailand’s long-term policy direction involves more renewables, gas supply from the Gulf of Thailand still affects electricity costs, import exposure, and the country’s ability to manage demand during periods of high power consumption.
LNG Has Become Thailand’s Balancing Fuel
Thailand is now one of Southeast Asia’s most important LNG import markets. LNG gives the country flexibility, but it also links Thailand more directly to global gas prices, shipping conditions, and long-term procurement strategy. That is a different risk profile from relying mainly on domestic offshore supply and regional pipeline gas.
Reuters reported in January 2026 that Engie signed a 15-year LNG supply agreement for Thai power plants owned by Gulf Development, with deliveries of up to 0.8 million metric tons per year beginning in 2028. The deal was described as part of Thailand’s national gas supply strategy, including diversification of supply sources and long-term price and volume stability. Reuters also described Thailand as Southeast Asia’s largest LNG importer.
Long-term LNG contracts can reduce exposure to short-term spot-market volatility, but they also shape the power system for many years. If Thailand contracts for large future volumes of LNG, it may improve supply security while also locking in gas infrastructure and fuel commitments at a time when renewable power and storage are becoming more competitive.
That is the tension at the center of Thailand’s natural gas policy. LNG can help replace declining domestic production and support coal-to-gas switching, but too much reliance on imported LNG can raise costs and complicate the country’s energy-transition goals. Energy Tracker Asia reported that Thailand’s Gas Plan 2024 expects LNG to rise from 31% of gas needs in 2024 to around 40% by 2030.
Power Generation Drives the Gas Market
Natural gas demand in Thailand is closely connected to electricity. Gas-fired power plants provide dispatchable generation, supporting the grid when demand rises or when renewable output is unavailable. This has made gas valuable in a system that needs reliability for manufacturing, tourism, urban services, and household consumption.
The country’s gas demand is commonly divided among power generation, industrial use, and transport. Kasikorn Research identified power generation, industry, and natural gas vehicles as the three key demand markets for natural gas in Thailand. It also projected a slight decline in overall natural gas demand in 2025, with imports expected to fall as demand softened and domestic production improved.
This demand profile gives Thailand a difficult balancing act. Gas-fired power plants help maintain reliability, but they also create fuel-import exposure when domestic supply declines. If power demand rises while domestic gas production falls, LNG imports may expand. If renewables, efficiency, and grid flexibility grow faster, the country may be able to limit new LNG dependence.
Thailand’s gas system is therefore tied directly to power-sector planning. Decisions about solar, wind, storage, transmission, and reserve capacity will influence how much gas the country needs. Gas is likely to remain important, but its future role depends on whether it remains the default fuel for new demand or becomes more of a balancing fuel for a more diversified electricity mix.
Myanmar Pipeline Gas Adds Another Layer of Risk
Thailand’s gas security is not only about domestic production and LNG. Pipeline imports from Myanmar have also played a role in the country’s supply mix. These imports have been valuable because pipeline gas can provide stable regional supply, but dependence on Myanmar also creates exposure to production decline and political instability.
Kasikorn Research projected that Thailand’s natural gas imports would decrease in 2025, partly because imports from Myanmar were expected to fall due to declining production at Myanmar’s major gas fields.
That decline reinforces Thailand’s broader supply problem. Domestic offshore fields are mature, Myanmar pipeline supply is less reliable as a growth source, and LNG is more expensive and globally traded. This combination makes energy diversification more important. It also explains why Thailand’s gas strategy increasingly focuses on portfolio management: domestic production, pipeline gas, long-term LNG contracts, spot LNG, and alternatives to gas in the power system.
Thailand’s Natural Gas Outlook Depends on Avoiding Overdependence
Thailand is unlikely to move away from natural gas quickly. Gas remains too important to electricity generation, industrial energy use, and grid reliability. The more realistic question is whether Thailand can reduce the risks of gas dependence while maintaining enough supply to support economic activity.
The country’s strongest near-term option is to improve the balance among domestic production, contracted LNG, renewable power, grid investment, and demand management. Domestic fields such as Erawan can reduce import needs when production is strong. Long-term LNG contracts can provide volume security. Renewables can reduce fuel demand. Grid modernization can make variable renewable generation easier to absorb.
The risk is that Thailand overbuilds around LNG while domestic production declines and electricity demand remains uncertain. In that scenario, imported gas could become more expensive than expected, leaving consumers exposed to higher power costs. Thailand’s natural gas future will be shaped less by whether gas remains important and more by how carefully the country limits its dependence on imported LNG while building a more flexible power system.
