The application of sequence stratigraphy to the prediction of subtle trap——Take Songnan region as example
BAI Tao~1,XU Zhi-wei~2 (1.College of Earth Sciences,Jilin University, Changchun130026,China;2.Exploration Institute of Jilin Oilfield, Songyuan131100,China)
Based on the development characters of sequences in typical inversion seismic sections and wells of Songnan region, nine sequences and twelve system tracts are identified.Under the direction of the theory of sequence stratigraphy,by applying the technology of seismic inversion constrained by well combing with data of well log and core, the authors predicted subtle traps. The results of researches indicate:sandstone lens-shaped lithology trap mainly distributed in highstand system tract of member 2 of Qingshankou Formation and member 2 and 3 of Yaojia Formation; sandstone updip-pinch-out lithology traps mainly distribute in transgressive system tract and highstand system tract of Yao1 section; stratigraphy overlap traps mainly distribute in transgressive system tracts; structure-lithology traps and fault-lithology traps can be seen in every system tracts, which depends on the development of structures and faults.
【CateGory Index】： P539.2