WellSeismic Unified High Resolution Sequence Analysis and Analogy  in Sifangtuozi Area of Southern Songliao Basin 

Key words: 
• Sifangtuozi /
• high resolution /
• sequence analysis /
• seismic and drilling mutually unified

Abstract: Analysis and analogy of sequence are the most basic contents in the study on sequence stratigraphy. Currently, it is main way to establish highfrequency sequence stratigraphic framework by application of drilling data, and the application of seismic data, but the typical primary profile analysis, is less in China, thus to lead to some crosslayer phenomena. The key of sequence stratigraphy research is comprehensive utilization of outcrop, paleontology, logging and seismic data, and the highresolution core, logging and threedimensional seismic data is three basic components of sequence stratigraphy analysis. It will be finally possible to establish more actual sequence stratigraphy framework by mutual verification of these three types of information. Based on drilling sequence and seismic data, the well seismic unified stratigraphic framework is established by using synthetic seismogram, which is a reliable basis for analyzing the sequence stratigraphy internal characteristics and searching for hidden hydrocarbon traps. This paper established the 34 grade sequence stratigraphy framework of seismic and drilling mutually unified, which was divided into four thirdorder sequences (of which three in Qingshankou Group and one in Yaojia Group) and 20 fourthorder sequences in Qingshankou  Yaojia group of Upper Cretaceous in Sifangtuozi area of southern Songliao Basin.