Oil and natural gas were formed from the remains of prehistoric plant and animals. The oil and gas that formed in the source rock deep within the earth moved upward through tiny, connected pore spaces in the rocks. Reservoirs are not underground "lakes" of oil; reservoirs are made up of porous and permeable rocks that can hold significant amounts of oil and gas within their pore spaces. Most reservoirs contain oil, gas, and water. Technological innovation makes it easier to find new deposits of oil and gas and to get more oil or gas from each reservoir that is discovered. The reservoir...
Oil and natural gas were formed from the remains of prehistoric plant and animals. The oil and gas that formed in the source rock deep within the eart...