Seismic Response Variance of Depositional Sequences: Implications for Reservoir Prediction in Lacustrine Basin

In recent years, lithologic oil and gas reservoirs have become an important target in continental hydrocarbon-bearing basins. Geophysical prospecting technology using seismic data is indispensable tool for exploration. However, while previous work has paid much attention to the responses of (sandstones), depositional sequences composed sandstone–mudstone cycles are not well understood reservoir prediction. This problem seriously restricts efficient oil–gas exploration development. The Cretaceous Baxigai Formation Yingmaili area, west Tabei Uplift, Tarim Basin. deeply buried with thin thickness. study area divided into a lower sandstone section upper mudstone section. Braided river delta sand bodies developed section, braided beach bar According difference different zones, five types vertical combination style were identified. Through forward modeling, response variance kinds sequence models was established. Then, amplitude attributes extracted via wavelet decomposition reflect distribution zones. could help predict horizontal distributions sandstones these sequences. During sedimentary period Formation, distributed along northeast coast. pinched out up-dip direction form favorable traps, which significance