Study on the Seismic Facies and Sedimentary Facies of Qingdong Depression

Based on the comprehensive research on drilling,seismic,logging data etc,the paleogene sequences and the types of seismic facies were recognized by using the theories of seismic stratigraphy,sedimentology and logging geology in combination with drilling data and the regional tectonic background,the seismic facies were transfered into sedimentary facies through seismic interpretation.Study shows that the paleogene strata can be divided into four third-order sequences and according to the amplitude,frequency,continuity,inner reflecting configuration and external geometric shape of the seismic wave,five types of seismic facies can be recognized in the four third-order sequences.The types of sedimentary facies in the study area are mainly delta,fan delta,slump fan and lacustrine facies.The research of sedimentary facies during the early exploration period is of important significance in the future exploration.