Abstract

Summary Bohai Q Oilfield is a typical river facies oilfield in this region. Due to frequent lateral oscillation and vertical shear stacking of river channels, mudstone interlayers between composite sandstones of multiple sedimentary periods are widely developed, and their distribution has an important impact on the analysis of injection production connectivity. Due to the limitation of seismic resolution, it is difficult to identify mudstone interlayers, which poses great difficulties for the subsequent remaining oil exploration work in the oilfield. This article attempts a combination method of stratigraphic dip angle constrained spectrum inversion and seismic wavelet transformation, which effectively improves seismic resolution, improves the response of seismic data to composite continuous sand and mudstone interlayers, and completes the identification and stage dissection of composite sand and mudstone interlayers.