DUBAI, United Arab Emirates — A rising population and a lifestyle of fast cars, big homes and large, air-conditioned shopping malls is pushing demand for water, electricity and oil in Saudi Arabia toward levels that analysts say could soon affect oil exports — and potentially global oil prices.

Saudi Arabia will need to spend 800 billion riyals, or more than $200 billion, over the next 10 years to meet skyrocketing demand for water and electricity, Saudi Arabia’s deputy electricity minister, Saleh al-Awaji, told an industry conference last month.

The population of Saudi Arabia, the world’s top oil exporting country, has climbed from 20 million in 2000 to 28.3 million in 2012, according to the World Bank. Adding to the pressure, water supply for cities and industries is heavily dependent on desalination, which consumes a lot of energy.

Demand for water and electricity has risen by 8 percent annually in the last few years, “to challenging levels,” Mr. Awaji said, according to local news reports. His investment figure of 800 billion riyals, taking into account a slew of recently announced new housing and infrastructure projects, was substantially higher than the government’s last official estimate, which put the requirement at 500 billion riyals by 2020.