Abstract: The visualization of 3D seismic data is a technique of full 3D seismic data interpretation. The 3D data can be analyzed directly by using this technique. What's more, direct evaluation on the seismic reflection of underground interface in 3D space can be achieved based on the adjustment of the transparency of seismic data volume. The practical procedure is presented as follows: firstly, inputting 3D seismic data with certain amplitude, coherent data, wave impedance data, and then calibrating the objective layers of sandbodies, determining the seed point along the objective layers and tracing automatically, describing the distribution shape of sandbodies. On the basis of the above structural interpretation, the depth variation of sanbodies has been obtained through the top and the bottom describing, and it can be revealed the space distribution law of clastic-fluvial sandbodies and dissolve hole reservoirs of carbonates

Key words: transparency, coherency data volume, fluvial facies, 3D visualization, reservoir prediction