Japanese power generation company JERA has completed its acquisition of the South Mansfield upstream asset in the Haynesville Shale basin in western Louisiana, US, in a transaction valued at $1.5bn (Y230bn).
The purchase was made through its subsidiary, JERA Americas, as part of a previously announced agreement with Williams and GEP Haynesville II.
The Haynesville asset is said to produce more than 500 million standard cubic feet per day (mscf/d) and includes 200 undeveloped locations.
JERA intends to enhance production to one billion standard cubic feet per day.
The acquisition grants JERA full ownership of the asset from Williams Upstream Holdings and GeoSouthern Energy.
This move expands JERA's investment in the region, which already includes significant ventures in natural gas, LNG, renewables, advanced fuels and carbon reduction technologies.
These investments are part of a broader strategy to stimulate economic growth, create jobs and enhance local tax revenue.
JERA's notable projects in Louisiana include the Blue Point low-carbon ammonia facility in Ascension Parish, developed with CF Industries and Mitsui, which aims to produce 1.4 million tonnes per annum (mtpa) of ammonia.
The facility will utilise natural gas feedstock and incorporate carbon capture and storage technology.
Another key project is the Oxbow Solar Farm in Pointe Coupee Parish, a 300MW solar installation that has provided around 400 construction jobs over two years.
Additionally, JERA has established LNG offtake agreements with Cameron LNG for 1.2mtpa and is planning for up to 3mtpa of future LNG supplies from Louisiana.
The company's venture capital arm, JERA Ventures, is working with Newlab New Orleans to advance carbon capture technologies aimed at reducing emissions from gas-fired power generation.
The South Mansfield asset benefits from its proximity to Gulf Coast infrastructure and existing pipelines.
The development plans involve capturing and storing carbon dioxide emissions generated during production, aligning with JERA's commitment to energy solutions with lower carbon emissions.
JERA Americas CEO John O'Brien said: “Louisiana is a strategic priority for JERA, and the Haynesville Acquisition – in addition to our other commitments across the state – and underscores our intention to be a long-term partner in Louisiana's energy economy.
“We will approach Haynesville with the highest commitment to safety, operational excellence and respect for the communities where we work, and we look forward to building lasting relationships as we continue expanding our presence here.
“Our growing portfolio demonstrates a long‑term commitment to investing in the state, supporting communities, and strengthening a reliable, more sustainable energy system.”
In June 2025, JERA signed 20-year offtake agreements to procure up to 5.5mtpa of LNG from the US.
