Gas lift is a method used in the oil and gas industry to enhance the production of hydrocarbons from wells. It involves injecting gas, usually natural gas, into the well to reduce the density of the fluid column, making it easier for the oil to flow to the surface. This technique is particularly useful in wells where natural pressure is insufficient to bring the oil to the surface. The process works by creating a mixture of gas and liquid, which decreases the overall weight of the fluid in the well. This allows for a more efficient extraction of oil, especially in deeper wells or those with low reservoir pressure. Gas lift systems can be adjusted to optimize production based on changing conditions in the well.