Shale brittleness index acquisition method and device, terminal and storage medium

The invention provides a shale brittleness index obtaining method and device, a terminal and a storage medium. The method comprises the following steps: acquiring acoustic parameters corresponding to a plurality of typical shale samples in a layer series of a target area, and characteristic parameters of different substance components in each typical shale sample; according to the acoustic parameters of the plurality of typical shale samples and the percentage content of different substance components in each typical shale sample, determining the acoustic parameters of different substance components of the typical shale samples in the target area strata series; based on the acoustic parameters of the different substance components of the typical shale sample in the target area series of strata, calculating the acoustic parameters of a shale sample to be detected in the target area series of strata, and determining the brittleness index of the shale sample to be detected based on the acoustic parameters of the