fluid_system.position_in_wellbore
This specifies the spatial coordinates of this fluid system within a wellbore. By convention, this describes the location of fluids contained within the wellbore, such as a column of mud or a fluid cushion used in well testing. position_in_wellbore.fluid_system
This describes the fluid system for which this location within the wellbore is described. position_in_wb_s: Implements a foreign key to a row in one of the tables projected from entity position_in_wellbore depending on the value of the next column (See below). position_in_wb_t: Defines the name of the referenced table. Possible values are defined in @position_in_wellbore. fluid_system_s: Implements a foreign key to a row in one of the tables projected from entity fluid_system depending on the value of the next column (See below). fluid_system_t: Defines the name of the referenced table. Possible values are: fluid_sample, rsvr_fl_sys, well_opr_fl (@fluid_system).