Reuters reports that Beijing's crackdown on the misuse of import quotas combined with the impact of high crude prices could see China's growth in oil imports sink to the lowest in two decades in 2021, despite an expected rise in refining rates in the second half.

Shipments into the world's top crude importer and No. 2 refiner could be steady, or increase by up to 2% to just over 11 million barrels per day (bpd) this year, consultancies Energy Aspects, Rystad Energy and Independent Commodity Intelligence Services (ICIS) found.

That compares to an average annual import growth rate of 9.7% since 2015, and would be the slowest growth since 2001, China customs data showed. 

The flat forecasts coincide with plans by OPEC+ to raise oil output by 400,000 barrels per day between August and December. 

China has been the global oil demand driver for the last decade, and accounted for 44% of worldwide growth in oil imports since 2015, when Beijing started issuing import quotas to independent refiners.

While analysts expect global crude markets to stay in deficit this year despite the OPEC+ output rise, China's investigations into the trading of crude import quotas, and the resulting lower import allocations to independent refiners, have already cooled demand from the group that provides a fifth of China's imports.