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justification Selecting and development field governed by criteria
          of rationality.
                  What  is  a  rational  development  system?  Rational
          development system - a system that provides the needs of the state
          in the oil at the lowest cost possible and high oil recovery.
                  In  establishing  these  criteria  the  following  basic  points
          must be considered:
             1.  The minimum degree of well interaction.
             2.  Maximum recovery factor.
             3.  Minimum production cost.
                  A rational  development  plan must ensure the prescribed
          production at minimum cost and with the highest possible recovery
          factor.
                  Planning the development system consists of selecting a
          variant which meets all the above requirements. On this basis the
          problem  of  establishing  a  rational  development  plan  should  be
          subdivided  into  a  number  of  problems  to  be  solved  one  after
          another:
             •  establishing the geological-physical data;
             •  establishing  the  technical  indices  for  some  particular
                 development plan by means of hydrodynamic calculations;
             •  evaluating the economic effectivity of the different
                 development plans;
             •  choosing the most rational development plan by comparing
                 the geological- technical and economic characteristics
                 involved in different plans.
                  To  select  rational  development  field  conditions  at  the
          design  stage  different  options  for  development  are  calculated.
          Options are not only for systems development or by action on the
          layer but the parameters for the development of the same systems.
                  What  is  the  technology  of  extracting  oil  from  the
          depths?  The  technology  of  extracting  oil  from  the  depths
          defined mechanism that drives the oil and gas in the reservoir. In
          natural conditions, this oil displacement by water or gas contained






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