Well logging is a technique used in the oil and gas industry to gather information about the geological formations surrounding a borehole. This process involves lowering specialized instruments, called logging tools, into the well to measure various properties, such as rock type, porosity, and fluid content. The data collected helps geologists and engineers assess the potential for oil or gas production. The information obtained from well logging is crucial for making informed decisions about drilling and production strategies. It can also aid in reservoir characterization, which involves understanding the size and shape of the underground resource. Overall, well logging plays a vital role in resource exploration and management.