High Resolution Sequence Stratigraphy Analysis of Es2L in W99 Fault Block Reservoir in Dongpu Depress

The different base levels of cycles in the lower sub-member of Es2 in Wen 99 fault block reservoir in Dongpu depress were studied based on the principle and methods for high resolution sequence stratigraphy and the data from the well logging and core sample.1 medium-term stratigraphic base level cycle and 5 short-term stratigraphic base level cycles and 19 super-short-term stratigraphic base level cycles were recognized in this area,and a further discussion on sequence structure and stacking pattern of short-term stratigraphic base level cycle was given in this paper.Meanwhile,on the basis of single well analysis,higher accuracy isochronostratigraphic correlation was done at the different order base level cycles,for which half time unit boundary was selected as optimum correlation marker,and in the end a sequence stratigraphic framework of the lower sub-member of Es2 was built.