Rock modulus calculating method of shale gas reservoir

The invention discloses a rock modulus calculating method of a shale gas reservoir. According to the method, the equivalent elastic modulus of a rock matrix according to an isotropy self-consistent model, and accordingly, the effect of isotropy holes of the rock on the rock modulus is taken into consideration on the basis of the equivalent elastic modulus of the rock matrix. Furthermore, the effect of kerogen on a rock model is calculated through the isotropy self-consistent model, and the equivalent OA medium modulus is finally obtained through an Eshelby-Cheng model. According to the method, the effect of the holes in the shale gas reservoir and the kerogen on the rock modulus is fully taken into consideration, and the precision of analyzing the rock modulus of the shale gas reservoir is improved.