High Resolution Sequence Stratigraphic Characteristics of the Paleogene  Zhuhai Formation in Huizhou Depression Marine Delta

Key words: 
• high resolution sequence stratigraphy /
• baselevel cycles /
• Zhuhai Formation /
• marine delta /
• Huizhou depression

Abstract: By the research of core, logging profiles and micropaleontology, marine delta facies of Zhuhai Formation have been recognized in Huizhou Depresion. On the basis of integrating well data and seismic data, combined with the high resolution sequence stratigraphic theory, the marine delta sedimentary system of Zhuhai Formation from Huizhou depression of Pearl River Mouth basin, was divided into shortterm ,middleterm and longterm baselevel cycle. The structure of the shortterm baselevel cycle could be subdivided into asymmetric updeepening , asymmetric upshallowening and symmetric basic structure types. The baselevel cycles of different order are correlated in the restriction of seismic interpretations and method of cycle isochrostratigraphy correlation. Isochronous stratigraphic frameworks are established and single sandbody is correlated within them. Finally, the distribution and evolution of reservoir are analyzed within isochronous stratigraphic frameworks.