Quantitative analysis method for productivity influence factors of horizontal well in open hole completion mode

The invention discloses a quantitative analysis method for productivity influence factors of a horizontal well in an open hole completion mode, which comprises the following steps of: 1, constructinga productivity model; 2, constructing a liquid-solid two-phase wellbore flow model; 3, coupling the liquid-solid two-phase wellbore flow model and the productivity model through a coupling relationship to obtain a horizontal wellbore liquid-solid two-phase variable mass flow model; and 4, collecting oil well related parameters, solving the liquid-solid two-phase change mass flow model of the horizontal wellbore by using an iterative method, and performing sensitivity calculation analysis on the wellbore size, the crude oil physical property and the sand particle size. Stratum characteristics of the horizontal well section are fully analyzed; according to the method, the wellbore flow model and the productivity model are coupled by using the inherent existing relationship as the coupling relationship, and the influ