PTT Exploration and Production Public Company Limited (PTTEP) announced on September 8, 2025, that it has reached the final investment decision (FID) on a Carbon Capture and Storage Project (CCS) at the Arthit gas field. This milestone marks Thailand's first CCS development, designed to advance the country's Net Zero goal by capturing and storing up to 1 million tonnes of carbon dioxide per year.

Project Overview and Strategic Significance

Mr. Montri Rawanchaikul, Chief Executive Officer of PTTEP, stated that the CCS Project at the Arthit gas field represents Thailand's first CCS initiative. As Thailand's national petroleum exploration and production company, PTTEP is turning the Arthit CCS Project from vision to execution, marking a strategic step toward applying the technology to reduce greenhouse gas emissions in line with government policy.

The project has been recognized under the Nationally Determined Contribution (NDC) Action Plan on Mitigation 2021–2030. According to Mr. Montri, PTTEP strives not only to safeguard the country's energy security but also to reduce greenhouse gas emissions, positioning CCS as an essential technology both nationally and globally that complements other clean energy solutions in addressing climate change.

Government Support and Policy Alignment

The Arthit CCS Project has been endorsed as one of the Flagship Projects for greenhouse gas emissions reduction under the NDC Action Plan. The project has received approval for the government to consider measures and grant appropriate investment support, including tax incentives. PTTEP is working closely with relevant government agencies to ensure alignment with the country's emission reduction objectives.

The project will serve as a pilot for cultivating expertise and driving CCS adoption in Thailand, including the Eastern CCS Hub in the Northern Gulf of Thailand, which has the potential to make a material contribution to the country's Net Zero target and enhance the nation's long-term economic competitiveness.

Technical Specifications and Implementation Timeline

PTTEP has conducted extensive studies and assessments in preparation for the project, covering the entire process from storage site selection to engineering design and comprehensive Measurement, Monitoring, and Verification (MMV) programs. The storage reservoirs are located at depths of 1,000–2,000 meters. The company will leverage existing infrastructure at Arthit field while constructing and installing additional facilities as required.

Carbon storage operations are expected to commence in 2028, with capacity gradually ramping up to around 1 million tonnes of carbon dioxide per year. The development will not impact natural gas production at the Arthit field.

Investment and Financial Details

The five-year investment for the project is estimated at approximately THB 10 billion, equivalent to USD 320 million. This represents PTTEP's commitment to implementing carbon capture and storage technology as part of Thailand's climate change mitigation efforts. CCS is described as a reverse process of petroleum exploration and production, where natural gas is extracted from underground to provide energy for national development and everyday life.

At the same time, excess carbon dioxide is captured and safely injected back into its original subsurface reservoirs.

Broader Environmental Initiatives

Beyond the CCS project, PTTEP has implemented a range of initiatives aimed at reducing greenhouse gas emissions. These include reusing excess gas from petroleum production processes, improving production efficiency, adopting renewable energy, and prioritizing low-carbon intensity projects within its portfolio. The company has also undertaken reforestation and mangrove planting projects to expand green areas that can help absorb greenhouse gases substantially.

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