Designed for undergraduates in petroleum engineering and geology programs, this basic textbook examines the techniques involved in the economic evaluation of oil and gas producing properties and drilling prospects. Presenting practical methods, reinforced by numerous examples for analyzing decisions concerning investment in the oil and gas industry, this timely work treats such areas as volumetric estimates, material balance estimates, the concept of time-value of money, profit indicators and their advantages and disadvantages, risk and uncertainty, and more.