Abstract:

Abstract:  Thinalternatingbeds exist commonly in rifted terestrial lake basin, like beach bar sandstones; they have some common characteristics, like the fast changes in horizontal direction and thinness of a single bed;these features, in addition to the low seismic data resolution, make the  seismic prediction difficult. In this study, we have analyzed all kinds of lithologic geophysical signatures in the area where the beach bar sandstones developed in Es4 in Boxing Sag, and analyzed the seismic reflection features of different lithologies and their combinations using an inversion model combined with actual well results. The study determined the seismic attributes, such as the seismic waveform structure and the ratio of the areas on both sides of the maximum of the seismic reflections from different sandstone combinations, and summed up the corresponding relationships of the thinalternatingbeds and their combination patterns with the attributes of each seismic reflection. Using these results, we have predicted exactly the development belt of reservoir in exploring the bank and dam body reservoir of Es4 in the west of Dongying Depression.

Key words: Key words: waveform; model; multilithology combination; attribute; prediction