👉 In petroleum geology, a term used to describe rocks that are rich in oil and gas resources. These rocks are composed of minerals like calcite (calcium carbonate), dolomite, or other calcareous materials that have been subjected to high pressure and temperature conditions over millions of years. The presence of these minerals leads to the formation of large amounts of oil and gas when the rocks are heated to their melting points. Petroleum is a valuable resource for many industries such as drilling fluids, transportation fuels
