Abstract: The concept of seismic resolution and the affected factors are discussed in view of theory and practical application. The study shows that it is seismic resolution that controls the accuracy of structural mapping,but for some special geologic bodies and marker horizons under a certain condition, their accuracies of structural mapping exist specified connotations. For the process of sand body description, whether wave impedance profile, trace integration profile, or phase-interference method have to be used under the requisite of resoluble seismic signals,because different resoluble seismic information have different effects on different processes and contents of sand body description.

Key words: seismic resolution, wavelet, contour map, accuracy, reservoir description