In this paper,on the basis of previous work,by the use of the th eories and methods of seismic stratigrapthy, reservoir geology, logging geology and petroleum mathematical geology, the seismic geological characteristics of BS3 in the Wanquan area are dealed with ,the method of correlation of reservoirs in the de lta area is discussed, and the depositional and distribution characteristics o f the reservoirs and are also described. By means of the environment correction, oilfield logging data normalization and methods of multistep regression analysis and the best approximation of curved s urface, the conversion relationship between the reservoir parameters of ES3 and its logging responsive values in this area has been determined, the spatial dist ribution of the target reservoir paramters has been described, and the mathemat ical model of typical sand body has also been constructed. By making use of the t echnique of pattern recogition and fuzzy synthesizing judgement, pavorable re servoir strata and area has been predicted