Abstract：Based on the detailed observation and description of cores from 7 wells in P well area in the East China Sea shelf basin, the sedimentary microfacies types and sedimentary models of Pinghu Formation are studied comprehensively with logging, laboratory and seismic data. The results show that the Pinghu Formation in the study area develops a set of transitional sedimentary system, dominated by tidal delta-tidal flat deposits. The sedimentary subfacies mainly include delta front, prodelta and intertidal zone. Seven sedimentary microfacies, such as underwater distributary channel, mouth bar, interdistributary and tidal channel, are further identified. The distribution of sedimentary microfacies is obviously affected by the syngenetic fault. Where the fault throw is small, the underwater distributary channel sediments will be diverted with the increase of the angle between the provenance and the strike of fault. While at the places with large fault throw, the sediments will be deposited only in the lower part of the hanging wall of the contemporaneous fault, with limited advance to the center of the basin. Based on the analysis of sedimentary system, the sedimentary model of tidal delta front in the study area is established.
张志垚, 张昌民, 侯国伟, 徐清海, 冯文杰, 陈哲. 东海盆地某凹陷P井区平湖组沉积微相及沉积模式[J]. 地质与资源, 2020, 29(2): 142-151,160.
ZHANG Zhi-yao, ZHANG Chang-min, HOU Guo-wei, XU Qing-hai, FENG Wen-jie, CHEN Zhe. MICROFACIES DISTRIBUTION AND SEDIMENTARY MODEL OF PINGHU FORMATION IN P WELL AREA, EAST CHINA SEA BASIN. GEOLOGY AND RESOURCES, 2020, 29(2): 142-151,160.
Abbas A, Zhu H T, Zeng Z W, et al. Sedimentary facies analysis using sequence stratigraphy and seismic sedimentology in the Paleogene Pinghu Formation, Xihu Depression, East China Sea Shelf Basin[J]. Marine and Petroleum Geology,2018,93:287-297.
2020, Vol. 29 
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