Paper: Problems Of Two Zone Pumping

Substantial economies are obtained in many areas by depleting two formations simultaneously within the same well bore. The saving in initial investment of drilling cost and equipping a dual well is forcibly evident over the costs of drilling twin wells. Present day methods for the practicable and profitable production of dually completed wells have progressed to such a degree that as a matter of practical economics operators are virtually compelled to review the possible advantages of two zone production before starting additional drilling and work-over programs.