Doha will supply 3 million tonnes of gas a year under the deal, QatarEnergy said, announcing another agreement, which grants the Chinese oil giant a further share of Qatar’s North Field gas expansion project.
The expansion, which broke ground last month, contains the world’s biggest natural gas reserves and extends under the Gulf into Iranian territory.
Under the deal signed in Shanghai, QatarEnergy will give Sinopec a 5 per cent interest in a joint venture with a 6 million tonnes per year capacity in the second phase of the expansion, North Field South.

Asian countries led by China, Japan and South Korea are the main market for Qatar’s gas, which has been increasingly sought by European countries since Russia’s invasion of Ukraine early last year.
In April, state-owned Sinopec became the first Asian firm to secure a stake in the Qatari expansion’s first phase, North Field East.
In 2022 the Chinese firm signed a 27-year supply deal with Qatar for 4 million tonnes of liquefied natural gas (LNG) annually, which at the time was the longest in the industry.
“These historic milestones are a testament to the excellent bilateral relations between the People’s Republic of China and the state of Qatar as well as between Sinopec and QatarEnergy,” the Gulf firm said in a statement.
The first Sinopec deal was followed by a flurry of similar 27-year agreements with France’s Total, Britain’s Shell and Italy’s Eni, all announced in recent weeks.
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In June this year, Qatar also announced a 27-year supply deal with the China National Petroleum Corporation.
US giants ConocoPhillips and ExxonMobil have also signed deals to partner in the expansion.
Qatar is one of the world’s top LNG producers, alongside the United States, Australia and Russia.
QatarEnergy estimates the North Field holds about 10 per cent of the world’s known natural gas reserves.