Seismic response of Ordovician fractured carbonate reservoir shows generally weak amplitude in Tabei region so that it is difficult to predict precise distributing location of the reservoir by conventional prediction technique. Optimum of prediction techniques has shown that the optimized seismic attribute of P1 correlation component can predict fractured reservoir more accurately. The seismic attribute of P1 is applied to predict the distribution of the fractured reservoirs with weak amplitudes at the Ordovician Yijianfang Formation in Well YM2 filed, the Ordovician Yingshan Formation in Well LG7 filed and the Ordovician Lianglitage Formation in Lungudong field, which shows the predicted results coincident well with the actual drilled ones.