Application of sequence stratigraphy in lithological reservoir exploration of the Upper Guantao Formation, Chendong-Feiyantan Oilfield

Distribution of reservoir in the Upper Guantao Formation of Neogene in Chengdong-Feiyantan Oilfield, Jiyang Depression is comprehensively studied by sequence stratigraphy and the high-resolution sequence stratigraphic framework is established. The Upper Guantao Formation can be divided into one 3-order sequence with 3 system tracts, 10 parasequence sets and 23 parasequences. Effects of the sequence boundary, max flooding surface, first flooding surface and parasequence boundary on oil distribution are demonstrated. Though sand-bodies occur mainly in LST and TST, the hydrocarbon is mainly distributed in TST.