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Using seismic sedimentology theory to study tight reservoirs is significant for predicting the distribution of unconventional reservoirs. Based on 90 °phase seismic data volume, the sand layer seismic reflection frequency is analyzed using time-frequency analysis technology. Combined with seismic filtering, the seismic interference of the sand layer is suppressed. The high-frequency isochronous stratigraphic framework is established based on the high-precision sequence stratigraphy analysis and seismic sedimentology research technology. The sedimentological interpretation of stratigraphic slices with different dominant frequencies is carried out by combining geology, logging, and seismic data. The study shows that the physical properties of rocks are the basis of sedimentological interpretation of seismic data. The delta front subfacies are the main sedimentary subfacies of the eighth member of the Shihezi formation. The main sedimentary microfacies are two distributary channels on a large scale. The natural gamma ray curves of the fillings and bodies of the underwater distributary channels are bell-shaped, toothed bell-shaped, or box-shaped. They show medium and strong energy zonal reflection patterns on the stratigraphic slices. This method helps improve the accuracy of sedimentary system prediction.
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