With the improvement degree of exploration and the increasing difficulty of development, we need more geophysical techniques than before. In order to solve the difficulty in prediction of fractured shale reservoirs, we develop a new technique named density projection using the method of modern signal analysis. It can not only display many attributes overlay but also avoid the problem of multi-solution. It can further perfect the technology series of reservoir prediction. The technique has been applied in the lower Es3 of Luojia region of Bonan sag of Shengli oilfield, and obtained a good result. It can guide us to understand the distributing of fractured reservoirs and help us to deploy horizontal wells.