Which country has the most untapped oil reserves?

Can you tell me which country currently boasts the largest untapped oil reserves? It's a question that has garnered significant attention in the world of finance and energy, given the strategic importance of oil as a commodity and its influence on global economies. As the world continues to grapple with energy demands and the transition towards more sustainable sources, the discovery and exploitation of new oil reserves remains a key consideration. So, which nation holds the most untapped potential in this regard?