Abstract: In two-dimensional prospecting, the conventional interval between two neighboring indexes of lithologic index quantifier is 25%, such quantifier has contributed to a certain degree in application to regional prospecting, while it cannot meet the accuracy requirement of reservoir prediction in three dimensional prospecting. This paper suggests, in 3D prospecting region, by means of raising the resolution of lithologic index quantifier, the accuracy of lithologic prediction can be improved. Actual data have verified that the seismic prediction result is basically correspondent with drilling logging recorded result. The accuracy of prediction is obviously improved.

Key words: 3D seismic exploration, velocity analysis, lithology, resolution, lithology identification