Horizontal well fluid production profile testing tubular column based on tracer marking and process

The invention discloses a horizontal well fluid production profile testing tubular column based on tracer marking and a process, and belongs to the technical field of oil field oil extraction. An underground pipe string of the horizontal well fluid production profile testing tubular column sequentially comprises a screwed plug, a screen pipe, a plurality of sections of oil pipe short sections, a plurality of underground intelligent switches, a guide oil pipe and an oil extraction pump from bottom to top, the screwed plug is arranged at the tail end of the screen pipe, the multiple sections of oil pipe short sections are sequentially connected through the underground intelligent switches to form a testing pipe section, and a corresponding specific solid tracing marker is arranged in each underground intelligent switch; one end of a testing pipe section is connected with the screen pipe, and the other end of the testing pipe section is connected with the guide oil pipe; the oil extraction pump is arranged in th