RE:RE:JUST GOT THISthanks for the link Estevan.
Everyone forgets that Saudi exports and production are 2 different numbers. Domestic use = 3mmbpd is why a major push is underway to produce tight gas with HZ wells and fracking so as to increase exports.
Also, from the link re: 2017 "The Kingdom already stated that it will cut overall crude oil shipments by around 600,000 bpd in August to balance the rise in domestic consumption during the summer" = likely also for 2018.
Increase summer exports = likely not. (sorry Mr Trump)
Also, since 2014, Aramco rig count did not decline, like the rest of the world, but increased 30% and have held steady for the past 4 years.
Spare capacity = ha, ha, in your dreams!.