BEIJING/SINGAPORE (Reuters) - As OPEC extends production cuts in a bid to tighten the oil market, China's independent refiners - awash with crude and facing disappointing local demand - are poised to slow purchases of oil for at least the next two months.
The move by China's so-called "teapots", a key driver of the country's crude appetite, will stir concerns about demand in the world's top oil buyer, which fell from a peak of 9.2 million barrels per day (bpd) in March to 8.4 million bpd in April.
Independent refiners, mainly based in Shandong, are under pressure to cut run rates as profit margins have been squeezed by Beijing's tighter scrutiny over taxes and shifting quota policies, while some have begun seasonal maintenance.
Plans by state oil majors to bring on new refining capacity later this year will help offset some import losses, but lower appetite from teapots and the potential for falling output indicates that the boom among this group of upstart refiners that has transformed China's oil market may be slowing.
"There will be more shutdowns in June, July and possibly August. It's seasonal but also because the market is not doing well and stocks are plentiful," said a manager at a Dongying-based independent refiner, who asked not to be named.
Independent refiners, which make up some 12 percent of China's crude demand, have enjoyed record profits since winning the right since late 2015 to import oil, selling diesel and gasoline throughout Asia while expanding domestic sales in unprecedented competition with state firms.
However, Beijing in January abruptly banned quotas for independents to export fuel, favoring its large state-owned refiners, put in a deadline for new applications for crude oil permits and tightened scrutiny on tax practices, squeezing margins.
Some refineries had rushed to buy crude in the first quarter, worried that they could be penalized for slow use of import permits, said a second teapot manager, who asked to only give his surname Wang.
"There were some over-purchases of crude earlier as (plants) were unsure of the quota policy. Now inventories are high everywhere," he said.
Some analysts reckon the run curbs may last longer than previously expected. Teapots operated at 58 percent of capacity in April, falling below 60 percent for the first time since October and down from record rates of almost 65 percent in February, according to BMI Research.
"Policy headwinds, domestic competition from SOEs (state-owned enterprises) and insufficient storage infrastructure at major port cities will cap imports," it said in a research note this week.
Wang said diesel inventories were particularly high in Shandong compared to gasoline. To ease the pressure, his plant planned to shut its 90,000 bpd crude unit through July for an overhaul.
Plans by state oil firms China National Petroleum Corp (CNPC) and CNOOC to bring on stream new refineries in Yunnan and Huizhou with combined capacity of 460,000 bpd, as well as some new approvals for teapot importers, are expected to bolster China's crude oil imports from August onward, analysts said.
Beijing over April and May has also provided approvals for six independents to import crude with total permits of around 280,000 bpd, although some are still preliminary.
Harry Liu, an analyst at consultancy IHS Markit, estimated China's total imports have fallen to around 8 million bpd at present, but could climb back to around 8.5 million bpd from around August.
"CNPC and CNOOC will contribute the bulk of the increases in refinery runs later this year. Teapots' contribution will be smaller as the environment for them to grow has got much tougher this year," Liu said.
Reporting by Chen Aizhu in Beijing and Florence Tan in Singapore; Editing by Richard Pullin