👉 Oil holes are geological formations that occur due to the accumulation of oil or other hydrocarbons in a reservoir. They are typically characterized by the presence of several layers, including sandstone, mudrock, and clayey rock, which can be thick enough to cover the entire area where they are found. Oil holes can vary in size from small patches of oil to large expanses of oil that extend for miles or even kilometers. The presence of oil holes is often associated with the development of oil fields
