Method for testing production profile of horizontal well

The invention discloses a method for testing a fluid production profile of a horizontal well. The method for testing the fluid production profile of the horizontal well comprises the steps that soluble types of markers are determined according to an oil-and-gas reservoir type, a completion structure and wellbore environment information of the well to be tested; in the completion stage of the wellto be tested, the markers containing well section identification information for different fractured well sections are separately put into a downhole specified well section; in the flow-back and production stage of the well to be tested, flow-back fluid and produced fluid are collected, wherein the markers are dissolved in the flow-back fluid and the produced fluid; and the well section identification information of the markers in the flow-back fluid and the production fluid is detected separately, and the corresponding content is determined to obtain the production contribution rate of each fractured well section. Ac