Researches on sequence stratigraphy of the Upper Triassic in the South Odors basin

The chrorostratigraphy of datum level cycling can be divided into two parts in high-resolution sequence stratigraphy.The petroleum of the Upper Triassic in the south of Odors can be divided into one middle term sequence stratigraphy and ten short term sequence stratigraphy.The evolution of sequence of sequence stratigraphy in time and space have evident controlling role in sedimentation thickness and packing manner, and the physical properties of sand body in subwater branch channel are affected by the variation of datum level and accomodate space too. As datum level rise,the physical properties of the cycling body become bad. On the contrary,the physical properties of the cycling body become well,the physical properties of a lowering cycling sand body are general better than those of arising cycling sand body.