Cooling Gas Until It Becomes a Liquid You Can Ship
Natural gas is hard to move across oceans until it is chilled into a liquid. That transformation created a global gas market and a set of very expensive, very specific assets.
The Problem With Gas
Natural gas is abundant and useful, and it has one great inconvenience: it is a gas. Moving it requires pipelines, which work well over land but cannot cross oceans. A country with abundant gas and no pipeline to a buyer historically could not sell it, and gas found far from demand was sometimes simply burned off as waste.
Liquefied natural gas, or LNG, solves this. Cooling gas to around minus 160 degrees Celsius turns it into a liquid that occupies a tiny fraction of its gaseous volume, small enough to load onto a specialised ship and carry across an ocean.
Liquefying gas shrinks it enough to fit on a ship, which is what turned natural gas from a regional fuel into a globally traded commodity.
The Chain of Expensive Assets
Delivering LNG requires a chain of specialised, capital intensive facilities, and each link is expensive and purpose built.
| Stage | Facility |
|---|---|
| Liquefaction | A plant that cools gas to liquid, extremely costly |
| Shipping | Specialised insulated tankers that keep it cold |
| Regasification | A terminal that warms it back to gas for the pipeline |
The liquefaction plant is the most expensive part, costing many billions and taking years to build. Because these assets are so costly and so specific, LNG projects have traditionally been underpinned by long term contracts, buyers committing to purchase for decades, before anyone commits the capital to build.
Why Long Contracts Mattered
An LNG project could not raise the enormous capital to build a liquefaction plant on the hope of selling into a spot market that might not exist. Lenders and developers required certainty, so the industry was built on long term contracts, often twenty years, frequently with prices linked to the oil price rather than to gas, since a gas benchmark did not exist in many importing regions.
These contracts made projects financeable and locked buyers and sellers together for decades. They also made the market rigid, since gas committed under a long contract to one buyer could not easily be redirected to another who needed it more.
The Shift to a Traded Market
Over time the market became more flexible. As more liquefaction and import capacity was built, and as the number of buyers and sellers grew, a spot and short term market in LNG developed alongside the long contracts. Cargoes could increasingly be bought and sold and redirected to wherever the price was highest.
This transformed LNG from a set of point to point contracts into something closer to a global commodity, with cargoes flowing toward the regions willing to pay most. A cold winter in one region could pull cargoes away from another, linking gas prices across continents that were previously separate markets.
The Geopolitical Dimension
Because LNG can be shipped anywhere, it changed the geopolitics of gas. A country dependent on pipeline gas from a single supplier is exposed to that supplier, since pipelines connect fixed points and cannot be redirected. LNG offers an alternative, since a country with an import terminal can buy from any exporter with a cargo to sell.
This became vividly important when European buyers, historically reliant on pipeline gas, turned to LNG to replace supply, bidding cargoes away from other regions and driving a scramble to build import capacity. LNG became not just a commodity but a tool of energy security, and the ability to receive it a strategic asset.
The Bottom Line
LNG turns natural gas into a liquid that can cross oceans, which converted a regional pipeline fuel into a global commodity carried on specialised ships. The chain of liquefaction, shipping and regasification is enormously capital intensive, which is why the industry was built on decades long contracts, and why it only gradually developed into a flexible traded market. That flexibility gave gas a geopolitical significance it never had as a pipeline fuel, because a cargo can be sent wherever it is needed rather than only where a pipe already runs.