O Mon IV (O Mon 4) is a 1,155MW combined-cycle gas turbine (CCGT) power plant under development by Petrovietnam, a government-owned corporation in Vietnam.
The new power plant will be established in Can Tho City, located in the Mekong Delta region, around 180km southwest of Ho Chi Minh City.
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The total projected investment for O Mon IV stands at close to VND30tn ($1.15bn).
The project’s construction commenced with a ground-breaking event in late August 2025. Its operational target is set for December 2028.
The power plant is expected to enhance the reliability of electricity supply to the national grid in the Mekong Delta, including the Can Tho area.
Location details
The O Mon IV thermal power station is part of a gas-to-power initiative, which serves as a national project aimed at improving energy security and promoting a transition to renewable energy sources in the region.
The Block B – O Mon project involves the extraction of gas from the Block B gas field, located in the Malay-Tho Chu basin on Vietnam’s continental shelf.
This project includes a 431km gas pipeline linking Block B to the O Mon district area, alongside the development of four gas power stations: O Mon I (1), II (2), III (3) and IV (4).
These power plants are situated within the O Mon Power Centre in Phuoc Thoi Ward, O Mon District, Can Tho City.
O Mon IV combined cycle power plant background
In 2023, the Prime Minister of Vietnam directed Petrovietnam to spearhead the development of the O Mon III and O Mon IV thermal power stations, ensuring effective coordination of downstream infrastructure alongside upstream gas supply.
Petrovietnam will incorporate the O Mon IV thermal power plant into its operational portfolio, increasing the company’s overall installed capacity to more than 9,300MW.
This additional capacity is projected to represent approximately 10% of the nation’s total power generation capability.
The initiative received recognition as one of Vietnam’s 250 significant national projects.
O Mon IV thermal power plant details
The O Mon IV thermal power facility will incorporate two Mitsubishi M701 JAC Series gas turbines.
The gas turbines have more than 64% combined cycle efficiency and have demonstrated reliability across three million hours of operation. They utilise air cooling and feature advanced thermal barrier coatings on their blades.
The M701 JAC Series is designed to achieve reduced emissions of NOx, CO2, UHC and VOC.
Transitioning from outdated coal-fired turbine technology to the JAC model can potentially decrease CO2 emissions by almost 70%.
Contractors involved
In June 2025, Petrovietnam finalised a Won900bn ($661.34m) engineering, procurement and construction (EPC) contract with a joint venture (JV) of Doosan Enerbility and Vietnam’s Power Engineering Consulting Joint Stock Company 2 for the O Mon IV thermal power station.
In September 2025, Mitsubishi Power, a division of Mitsubishi Heavy Industries, was contracted by the JV to provide two M701JAC gas turbines and related auxiliary equipment for the project.
A consortium comprising Fichtner, Power Engineering Consulting Joint Stock Company 4 (EVNPECC4) and the Vietnam Institute for Building Science and Technology was awarded a contract to provide project management consultancy services for the O Mon IV facility in August 2025.
O Mon III power plant details
The O Mon III CCGT has a capacity of 1,050MW and will occupy an area of 8,342 hectares. The operational period for this project spans 31 years, from the date the land lease was finalised in 2021 until 2052.
In March 2025, a ceremony was held at the National Power Transmission Corporation’s office to formalise the connection agreement for the O Mon III CCGT to the National Power System.
Construction of the facility is anticipated to begin in 2025. The facility will start to receive gas, undergo trial operations and commence commercial power generation in 2027.
This project aims to address the growing electricity needs in southern Vietnam.