PetroChina has achieved a daily output of 100 tons of oil (733 barrels) at a test well in the Jimsar field in Xinjiang province, suggesting that shale oil has strong commercial potential in the nation for the first time, analysts including Andy Meng said in a Feb 18 note.

China has had some success in producing shale gas, but advancing on shale oil would be a particular help to the world’s largest crude importer, which has seen output decline since 2015 even as the country’s leadership extols the virtues of energy self-sufficiency.

Still, it’s unlikely China will be able to scale the heights of US shale, which accounts for about half of American production, Morgan Stanley said.

The bank estimates shale oil output in China could reach about 100,000 to 200,000 barrels a day by 2025 – still a sliver of total output.

By comparison, the US produced 8.3 million barrels a day in February, according to Rystad Energy.

Nevertheless, excitement over shale could spur more spending and boost revenue for the oilfield service companies that will be called on to handle the higher workloads, Morgan Stanley said.

Yantai Jereh Oilfield Services, which is up 31% this year, and SPT Energy, which has risen 18%, are among the potential beneficiaries, it said.

“We believe the Jimsar shale oil discovery is likely to trigger China’s shale oil revolution,” Meng said in the report.

“We expect a further capex rise in 2019, which could make onshore oilfield services names the key beneficiaries.”

While Jimsar is China’s first shale oil find, the country has been drilling shale gas for years.

But difficult geology and restrictions that keep drilling in the hands of the state-owned giants have slowed development.

While the US Energy Information Administration estimates that China has nearly twice as much underground shale gas as the US, the US produced about 639 billion cubic metres of the fuel in 2017, compared to about 9 billion in China.