In connection with the problems that the massive data file of petroleum exploration industry is too large and unstructured, poor efficiency and consuming disk while data combining, Virtual seismic data file what is a logically complete seismic data file consist of many complete seismic data files by the description of metadata was put forward, it improves the efficiency of seismic data mergence. And according to the seismic data parallel access model, we access the seismic data files.