Most of the world's oil comes from these countries since these countries luckily sit on petroleum deposits. These deposits were created by trees that decayed over 300 million years ago and it happened that those countries sit on areas occupied by those primordial forests. There is no other reason.
This is not actually the case. In fact, almost all of these countries are soil-deficient and have trouble growing things in large swathes of the country.
If the question meant to ask: "Why does most of the world's oil come from Saudi Arabia Kuwait Iran Iraq and Algeria?" please see the Related Question below.
Saudi Arabia
No, Saudi Arabia is different country from Kuwait.
Iraq and Saudi Arabia ...... only
The OPEC Member Counties are: Algeria Angola Ecuador Iran Iraq Kuwait Libya Nigeria Qatar Saudi Arabia United Arab Emirates Venezuela
Saudi Arabia
-Kuwait -UAE -Saudi Arabia
Saudi Arabbia and Kuwait are countries in middle east Asia.
Saudi Arabia
12 in 2011[hide] Algeria Angola Ecuador Iran Iraq Kuwait Libya Nigeria Qatar Saudi Arabia United Arab Emirates Venezuela
KUWAIT
Saudi ArabiaAnswer:Both Iraq and Saudi Arabia are on the western border of Kuwait
Algeria, Angola, Ecuador, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, the United Arab Emirates (from wikipedia)