SINGAPORE, Sept 7 (Reuters) - Suppliers of liquefied natural gas (LNG) are betting on China to drive demand for the super-chilled fuel over the longer term despite last year's slowdown, as the country locks in multi-year supply deals.

China's LNG imports hit nearly 79 million metric tons in 2021, putting it ahead of Japan as the world's top importer that year, but stringent COVID measures curbed spot demand in 2022, when shipments slipped to 63 million tonnes.

"We see China as a long, strong growth market," said Andrew Barry, vice president for global LNG marketing at U.S. major ExxonMobil, adding that China will have more than 200 million tons of LNG import capacity by 2030.

However, an economic slowdown continues to curb China's spot LNG appetite. The country imported 39 million tonnes of LNG in the first seven months of 2023.

"What happens in the near term, with demand reduced ... we're going to have to wait and see how that response plays out. We are cautiously optimistic that demand is going to come back. The infrastructure is there, demand will come," Barry said in an interview on the sidelines of the Gastech conference.

Exxon, he said, is looking at potential downstream LNG opportunities in the country.

As its economy grows and with peak emissions and net zero goals of 2030 and 2060, respectively, China is likely to reach its commitment to source 15% of its primary energy from gas, said Anatol Feygin, chief commercial officer at Houston-based Cheniere Energy.

Gas accounted for 9% of China's energy mix in 2021, and the country has targeted raising that to 15% in 2030.

"We are very confident that China will be a 100-million-ton market, we think it's likely that it gets to about 130 million tons early next decade. We think that LNG has a very robust and elegant role to play in China's primary gas needs," Feygin said.

LONG-TERM PLAY

Chinese importers have signed a slew of long-term deals from suppliers including Qatar and the United States in recent months, which Exxon's Barry said gives a "huge amount of confidence."

State-owned Sinopec and China National Petroleum Corporation (CNPC) have each signed record 27-year contracts with QatarEnergy to take on 4 million tons per annum (mtpa) of LNG.

In July, China's Zhejiang Energy signed a 20-year supply deal with Mexico Pacific Ltd, while China Gas Holdings agreed in February to two 20-year LNG supply contracts for 2 million tons of supply with U.S. exporter Venture Global LNG.

China's ENN Natural gas also secured a two-decade deal with Cheniere for 1.8 million tons annually.

"In the last 10 years or so, the majority of China's LNG demand has already been covered by long-term contracts, but post-2030, the uncontracted amount will start to increase," said Miaoru Huang, research director for Asia Pacific Gas & LNG, Wood Mackenzie.

"So there's still potential that Chinese buyers will have appetite for new LNG contracts," said Huang, who forecasts that China's LNG demand could reach between 120 and 130 mtpa by 2040.

Rystad Energy forecasts that by 2030, there will be a 32-million-ton gap between China's current contract LNG volume and future demand, widening to 80 millions tons by 2040.

In the near term, China's LNG demand should grow by 5 million tons this year, and by 6 million to 7 million tons year-on-year in 2024, said Min Na, head of Asia LNG at Energy Aspects.

(Reporting by Emily Chow and Carman Chew; Writing by Tony Munroe; Editing by Christian Schmollinger)