Seismic attribute prediction method and system for effective reservoir of sand-rich stratum

The invention discloses a seismic attribute prediction method and system for an effective reservoir of a sand-rich stratum. The method comprises the following steps: (1) obtaining sensitive seismic attributes of a target stratum; (2) obtaining a weight coefficient of a sand-to-stratum ratio for the development of the effective reservoir of the sand-rich stratum; (3) determining a tuning effect affecting the target stratum; and (4) performing attribute fusion on the sensitive seismic attributes, the weight coefficient of the sand-to-stratum ratio for the development of the effective reservoir of the sand-rich stratum and the tuning effect to obtain fused earthquake attributes. The seismic attribute prediction method for the effective reservoir of a sand-rich stratum, provided by the invention, can highlight a seismic attribute bright spot of the effective reservoir, suppress tuning effect and a false attribute bright spot caused by a large set of mudstone in the sand-rich stratum, and improve the proportion of