Entity well_pattern_participation

• The description of the fractional participation (allocation) of a well completion in a well pattern. A corner well completion in a five spot pattern may have a horizontal factor of one-fourth, for example. These participations may change with time due to changes in reservoir behavior, operational parameters (rates), or when well completions are added to or deleted from the pattern.

Attribute                                 Flags   Data Type

From transient_association:
   data_collection                        IV      set[0 .. N] of (data_collection)

                                          Indicates the data collections that include this
                                          instance of E and P data. 

   graphical_element                      IV      set[0 .. N] of (graphical_element)

                                          Specifies one or more graphical elements which
                                          are depicting this data item. 

   description                            I       ndt_comment

                                          A description of the transient association. 

   duration                               IN      ndt_time

                                          Defines the duration of the association expressed
                                          in any valid units of time. 

   end_time                               IN      ndt_date_tod

                                          End time of the association. 

   start_time                             IN      ndt_date_tod

                                          Start time of the association. 

   caused_by                              I       activity

                                          Specifies the activity which establishes this
                                          association. 

   terminated_by                          I       activity

                                          Specifies the activity which established the
                                          termination of a transient association between
                                          two objects. 


horizontal_factor                                 ndt_pfrac_le_1

                                          The horizontal factor for a well completion in
                                          a well pattern. This factor is based upon the
                                          areal distribution or capture of fluids entering
                                          or leaving the well completion, and should be
                                          non-zero for all participating well completions.
                                          This fraction should be used to allow a well to
                                          contribute all or any part of its production or
                                          injection behavior to the well pattern. This factor
                                          is not modified to account for vertical separation
                                          of participation between zones that are defined
                                          as separate well patterns (use vertical factor).

ref_well_participation_geometry                   ref_well_participation_geometry

                                          The geometrical participation of a well completion
                                          in a well pattern, such as a central well, corner
                                          well, edge well, and off-pattern well. 

ref_well_participation_role                       ref_well_participation_role

                                          The role for a well completion participating in
                                          the well pattern, either producing or injecting.

vertical_factor                                   ndt_pfrac_le_1

                                          The vertical factor for a well completion in a
                                          well pattern. This factor is based upon the vertical
                                          separation of injected and produced fluids between
                                          separate zones for which overlapping well patterns
                                          are defined (i.e., upper pattern or lower pattern).
                                          This factor should be non-zero for all completions
                                          participating in the well pattern, and should
                                          be one for well patterns that are not split vertically.
                                          These fractions may be based upon production logs
                                          (spinner, temperature or tracer surveys) or estimated
                                          from performance and geological data (fraction
                                          of permeability-thickness, pressure, etc.) 

well_pattern                              MU      well_pattern

                                          This is the well pattern that the designated well
                                          completion is a part of. 

well_completion                           MU      well_completion

                                          This is the well completion for which this
                                          participation factor is defined. 

End of entity well_pattern_participation

M - mandatory, U - unique, I - inherited, V - inverse, N - named type