Application of seismic sedimentology in lithologic exploration of complex slope zones
The Pinghu Formation in the western slope zone of the Xihu Depression has developed lithological gas reservoirs,with the main gas reservoir area being deeply buried and complex lithological combinations,making it difficult to identify sand and mudstone.At the same time,the insufficient resolution of seismic data leads to poor consistency in the thickness of lithological bodies and difficulty in identifying boundaries.Based on seismic sedimentology,on the basis of identifying lithology,frequency division technology is applied to characterize lithological bodies with different thicknesses;On this basis,frequency division stratigraphic slices are applied to match ancient landforms and characterize the distribution range of lithological bodies.Through the research and application of seismic sedimentology,the development patterns of lithological bodies have been effectively identified in the study area and exploration discoveries have been made.
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