A STUDY ON HIGH-RESOLUTION SEQUENCE STRATIGRAPHY OF PALEOGENE-NEOGENE OIL-BEARING STRATA IN SHELF BASIN, EAST CHINA SEA

Shelf basin of East China Sea, filled with Tertiary oil-bearing strata that is great in thickness, is an important Cenozioc oil-bearing basin in China. With the help of analysing comprehensive well logs, 6 sedimentary systems with 12 sedimentary facies and 13 sedimentary subfacies of the oil-bearing strata is identified. By making a comprehensive research into facies successtions, facies associations, facies differentiation, volumetric partioning, and stacking patterns of strata, the paper subdivides base level cycles of 59~64 short term, 21~29 medium term, and 7~11 long-term, and compare the high resolution sequences with the former seismic sequences.