China has recorded the biggest increase in underground natural gas storage capacity of any country since 2022, according to a new report from the International Gas Union (IGU).

The report shows that global underground gas storage now totals about 424 billion cubic metres (bcm) across 699 facilities—an increase of 10 bcm in just three years. China alone contributed 6 bcm of that growth, moving up to sixth place globally, behind the United States, Russia, Ukraine, Canada, and Germany.

While many developed countries have seen only slow or minimal expansion in their storage systems, China continues to invest heavily in new facilities as part of its wider energy security strategy. The world’s second-largest economy aims to reduce dependence on imported liquefied natural gas (LNG) and ensure a steady energy supply during peak demand seasons.

Earlier this year, PetroChina acquired three major storage sites—Xinjiang, Xiangguosi, and Liaohe—from its parent company, CNPC. The move expanded PetroChina’s control over the gas supply chain, aligning with Beijing’s plan to strengthen domestic production and distribution.

China also launched its first underground salt cavern gas storage facility last month after a major expansion. The project, which state media called a key step toward energy resilience, will help the country better manage sudden