LyrArc Article Gist
Attacks from Iran on Saudi oil infrastructure leading to a loss of half of Saudi oil production is likely to be a problem for countries such as China, South Korea and Japan that have reduced oil imports from Iran and increased dependence on Saudi supplies. This was a result of tighter U.S. oil sanctions on Iran. India is also affected. About 30% of the lost production will be restored say Saudis. 

The U.S. is less dependent on Saudi supplies and as Gerald Seib points out in a video in WSJ the U.S. has 3 reasons not to intervene on behalf of Saudis. The U.S. has increased its oil production from shale oil and is less dependent on Saudi oil. It is also becoming reluctant to engage in Saudi Arabia's wars such as the one in Yemen against Houthi rebels. There is also less support in Congress and in the country for supporting endless wars that originate from Saudi actions. A Trump tweet before his election campaign shown in WSJ makes this point about endless wars and the U.S. needing to be paid trillions of dollars for these wars.

The conflicts in the region affect China and India where growth is close to 5% before any impact from oil price increases. Together Asian countries take in 72% of Saudi oil exports and China now imports more Saudi oil than Russian oil by a wide margin- in June 1.88 million barrels a day. Saudi oil makes about 19% of imported oil in India and 33% for Japan. Imports into India of Saudi oil are up 8% this year to 847,000 barrels a day in 2019.

China is better situated than Japan with reserve supplies of 644 days of imports compared to 230 days for Japan. This why Japan has played a constructive role in reducing tensions between the U.S. and Iran and urged both sides to negotiate. China and India also have interests that converge in reducing tensions between the U.S. and Iran. As a first step president Trump removed his National Security Adviser John Bolton in preference for reduced tensions.