Thin mutual reservoir description method taking reconstructed sand-to-ground ratio as seismic description target

The invention provides a thin mutual reservoir description method taking a reconstructed sand-to-ground ratio as a seismic description target. The method comprises steps of S1, explaining fine seismicstructures of top and bottom surfaces of a sand layer group; S2, generating a plurality of seismic attribute bodies by applying seismic means; S3, analyzing the correlation between the various seismic attributes and a sand-to-ground ratio and a net-to-gross ratio, determining whether the correlation has zoning or not, and selecting the seismic attributes with high correlation in zones for subsequent research; S4, respectively reconstructing the sand-to-ground ratio according to the zones in the S3, calculating the correlation between the reconstructed sand-to-ground ratio and the net-to-grossratio and the optimal seismic attributes, and giving a linear formula; S5, making an optimized seismic attribute planar graph, and converting the seismic attribute planar graph into a reconstructed sand-to-ground ratio or net