Seismic Facies Spread and Their Significance of Yingcheng Formation in Fulongquan fault-depression

Based on the theory and method of seismic stratigraphy in combination with synthetic seismogram calibration.According to seismic facies parameters such as interior structure,exterior shape of seismic reflection units,reflected wave termination types,frequency,amplitude,continuity,and bed velocity,six groups of seismic facies are identified.They are strong clutter amplitude discontinuous seismic facies,medium amplitude continuous sub-parallel seismic facies,strong amplitude continuous foreset facies,weak amplitude continuous sub-parallel seismic facies,weak amplitude continuous foreset seismic facies,weak amplitude weak continuous foreset facies,and weak amplitude weak continuous subparallel seismic facies.This study establishes correlation among seismic facies,sedimentary facies and log facies based on sedimentary microfacies on cross-well section,analyzes the significance of seismic facies,and predicts the distribution of the favorable sedimentary facies in this area.