Characteristics and Evolution Model of Sequence Stratigraphy of Feixianguan Formation in the Northeast of Sichuan Basin

Key words: 
• sequence stratigraphy

Abstract: Based on the knowledge of the sedimentary and tectonic settings in the northeast of the Sichuan basin, using the different methods, such as: outcrop, core, welllogging and seismic, and so on, with the careful analysis of the sequence surfaces, facies section, the stacking pattern, welllogging curves and seismic sequence stratigraphy, and so on, there are 2 thirdorder sequences distinguished in the Feixianguan Formation in the northeast of the Sichuan basin, both of which include the LST, TST and HST. Furthermore, using the theory of the sequence stratigraphy, by establishing the framework of the sequence stratigraphy of the Feixianguan Formation in the northeast of the Sichuan basin, based on the analysis of the control factors of the sequence stratigraphy, the evolution model of the sequence stratigraphy of the Feixianguan Formation is established in the northeast of the Sichuan basin. Furthermore, the distribution of the shoal is discussed in the framework of the sequence evolution; it is important to the further exploration of the hydrocarbon in the northeast of the Sichuan basin. 