The Sha III formation in Bonan subsag is widely developed with turbidite, and the reservoir has the characteristics of small size, limited area, highly variable lateral distribution, and complex vertical stacking, moreover, it is of weak reflection in the seismic signal and low in resolution, and unable to meet the requirements of reservoir description. Based on the seismic, drilling, logging, seismic reflection data, and in response to the seismic reflection features, we propose the 4 techniques to delineate the turbidite reservoir, including the blind source separation based on independent component analysis automatic layer fine interpretation, stochastic inversion and small sand picking techniques. The 4 kinds of techniques are utilized in the Bonan depression to realize the automatic interpretation of Sha III formation. The recognition of sand body in reservoir prediction is increased to 5-8 m, which has met the requirement of automatic tracking and mapping of the turbidite sand bodies. The techniques have been carried out in the study area to locate more than 70 sand bodies, and achieving good performance.