Method for predicting rock mechanical parameters of horizontal section of tight sandstone gas well by using drilling engineering parameters

The invention discloses a method for predicting tight sandstone gas well horizontal section rock mechanical parameters through drilling engineering parameters. The method comprises the steps that target horizontal well rock mechanical parameter factors are constructed through the drilling engineering parameters, and a horizontal section rock mechanical parameter factor curve is calculated; distinguishing different lithology by using a while-drilling gamma curve, and counting the mechanical parameter factor range of various lithology rocks in a horizontal section; carrying out different lithologic rock mechanical parameter and sound wave test experiments to obtain a dynamic and static rock mechanical parameter conversion relationship; static rock mechanical parameters of the same layer of an adjacent well are calculated, and different lithologic rock mechanical parameter value domains are counted; establishing a conversion relation function of mechanical parameters and rock mechanical parameter factors accordi