A STUDY ON HIGH-RESOLUTION SEQUENCE STRATIGRAPHY OF PALEOGENE-NEOGENE OIL-BEARING STRATA IN SHELF BASIN, EAST CHINA SEA
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摘要: 东海陆架盆地是我国重要的新生代海上含油气盆地,其中堆积了巨厚的古近-新近系含油层系。作者通过对录井资料的分析,在古近-新近系含油层系中大致识别出6大沉积体系、12种沉积相和13种沉积亚相。在此基础上,本文借助相序、相组合、相分异、沉积物体积划分以及地层叠置样式的综合分析,对该含油层系进行了高分辨率层序地层学研究,在其中识别出了59~64个短期旋回、21~29个中期旋回和7~11个长期旋回。最后,将文中所划分的高分辨率层序与前人的地震层序进行了对比。Abstract: 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.
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Key words:
- sedimentary facies /
- base level cycle /
- high resolution sequence /
- shelf basin /
- East China Sea
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