Which countries in Central Asia and the Caucasus have the largest proven reserve of oil?

Among the countries in Central Asia and the Caucasus, the following have the largest proven reserves of oil:

1. Kazakhstan: Kazakhstan has the largest proven reserves of oil in the region. As of 2021, it is estimated to have around 30 billion barrels of proven oil reserves.

2. Azerbaijan: Azerbaijan is another country in the region with significant proven oil reserves. It is estimated to have around 7 billion barrels of proven oil reserves.

3. Turkmenistan: Turkmenistan also has significant proven oil reserves, although the exact figures are uncertain. It is estimated to have around 600 million barrels of proven oil reserves.

Other countries in the region such as Uzbekistan, Kyrgyzstan, and Tajikistan have smaller or uncertain proven oil reserves.