Abstract: The sequence stratigraphy of Es²⁺³₃ formation in Gaoshangpu oil field is deeply studied with the method that seismic data controls well logs data while well logs data calibrates and adjusts seismic data dynamically. The target formation is classified into 1 sequence, 2 system tracts, 6 parasequence sets and 16 parasequences. Then, the features of sequence stratigraphic boundary are concluded. The thick shales on the top of Es²₃ and Es⁴₃ can be regarded as a general index horizon which is hard to recognize because of the complexity of lacustrine formation. And the sequence characteristics is debated that there are two sedimentation centers which prolong proximately eastward. The bottom regressive system tract, whose sedimentation center is well zone G35-1、G62 and G82, was formed in the early period of the lake shrinkage; The top transgressive system tract, whose sedimentation center is well zone G30-28 and G13-13, was formed in the later lake extension period, during which the two sedimentation centers migrated northward and eastward.

Key words: well logging, seismic, sequence stratigraphy, Gaoshangpu oil field