You are a well testing engineer in an oil and gas exploration and production company. Your company is considering buying a new lease in which water flooding project has been in implementation for an unreported period of time. Injection and production rates are set at 2000 STB/D and 1000 STB/D, respectively. Your company thinks that the field has been undergoing water injection for a long period of time and you are concerned with the possibility that the field would not produce a significant amount of oil after the purchase. In order to analyze the status of the field, your company measured the well-flowing pressure of the producer as 2500 psia. Assume that injected and produced fluids have the same properties