The petroleum industry today is a product of American business and with its 8,900 producing companies it is one of the most competitive industries in. America. Because of this it has emerged from World War II as one of our most highly specialized businesses, and never before has science been drawn upon and applied more vigorously in shaping a maturing industry.
Because we can never physically see the oil or gas reservoir in any of its in-place conditions, we must indirectly rely upon measurements of certain physical parameters to guide us in operating the reservoirs prudently. The development and operation of an oil or gas accumulation has, therefore, become a reservoir engineering enterprise; and more arid more operations are logically being based on factual reservoir information in this manner