Compared with general seismic techniques,VSP can remove noise effect more effectively and improve vertical resolution.Combining 3D seismic profile and core,the key layers are calibrated,their relations can be made definitely,and fine seismic attributes analyses is processed.Amore accurate geological model is set up and the reservoir heterogeneous can be made clearly by using VSP image.Taking Nanshanwan area for example,the thin sand of Putaohua oil layer can be recalibrated using VSP time-depth table,and its bottom can be interpreted accurately.The reservoir is predicted by several attributes analyses,and sedimentary facial map is established to put forward favorable exploration targets.
The Fuyu Oilfield, the first oilfield discovered in Fuxin Uplift, has been developed for 50 years, and the exploration degree is relatively higher. In recent years, more and more exploration results are obtained, with the analysis of reservoir-forming conditions of lithologic reservoirs and the application of reservoir lithology identification and modification technologies in the region. Paleouplifts developed in the Fuxin uplift zone, and "crescent-shaped" fluvial sand bodies are overlaid by a large scale, and "oil- rich sags" are distributed in the surrounding areas of the paleouplifts. So the Fuxin uplift zone has favorable conditions for the formation of super large lithology reservoirs. New oil reservoirs are discovered increasingly in the surrounding areas of the old oilfields of Fuyu and Xinli, based on the full application of the 3-D seismic reservoir prediction technology and the sedimentary microfacies technology as well as the large-scale fracturing and horizontal well technology. New layers including the Yangdachengzi layer are revealed gradually below the Fuyu Oilfield, with reserves exceeding 100 million tons.