Integrating risk management concepts into the drilling non-productive time

Abstract Introducing the non-productive time (NPT) concepts in 1960s was a necessity dictated by ever-increasing cost and complexity of oil gas well drilling. The NPT definition stayed unsettled until two decades later, converged toward its accepted current “the when planned or out-of-plans drilling-related activities do not add value to operation objectives.” as it is defined drilling nowadays form waste loss which adversely impacts overall efficiency operation. Since 1980s, risk management (RM) has become sound technique evaluate operational losses wastes many resources, including time. This paper presents an attempt couple RM techniques with philosophy together other such Systems Thinking, Synergy, Continuous Improvement, Total Quality. These derived suit controlling intolerable that shows up delay operations materializes into most undesirable costs concepts, adopted herein, were applied on data from 60 rigs used drill 250 wells for period 1 year In all 19 types considered. A Java software model developed express undesired event probability happening, order follow terminology. levels (related values) each rig then further classified four familiar ranks their colors RM: Acceptable (green), Tolerable (yellow), Inadmissible (orange), Unacceptable (red). matrix established categories named Rig-NPT Risk Matrix. maximum ceiling reference unacceptable risks rigs. Finally, sets control recommendations proposed minimize improve performance. concept science integrated gave new approach losses. Using analysis coupled indicate where optimize exerted efforts synergize improvement