Saudi's ability to maintain a cushion for the global oil market

""Rapidly growing domestic energy demand could even affect Saudi Arabia's ability to maintain a cushion for the global oil market. Saudi Aramco has warned that the country's crude export capacity would fall by about 3 million barrels per day to under 7 mb/d by 2028 unless the growth of domestic energy demand is checked. A Chatham House study has shown that current trends could begin to affect spare capacity by 2022."" (thanks Amir)