As Washington pushes to expand Venezuelan oil output, the US energy secretary stated that China has no claim on the additional revenue by way of debt service.

Venezuela holds among the world's largest proven reserves, but sanctions and ageing facilities have cut output sharply. Raising production requires heavy capital investment and technical staff.

China figures in the discussion because of oil-backed lending. Beijing previously lent to Caracas under contracts repaid in crude, and that debt relationship persists.

The American design appears aimed at two goals at once: increasing global crude supply to lower prices, and weakening China's creditor position in Venezuela.

Feasibility is another matter. Output takes time to raise, and international oil companies' investment decisions presuppose political stability and contract protection. Years typically separate a policy announcement from actual barrels.

The effect on prices is not immediate either. With a risk premium from the Middle East in place, whether Atlantic-side supply offsets it depends on scale and speed.

For Asian refiners the interest lies in diversifying crude sources. Distance and differences in crude quality mean actual purchasing decisions still turn on price and refinery compatibility.