Sedimentary Facies of Mingyuefeng Formation in Oujiang Sag,East China Sea Basin

CHEN  Guo-Jun, LI  Chao, LIANG  Jian-She, WANG  Qi, LV  Cheng-Fu, ZHANG  Jin-Wei, DU  Gui-Chao, TIAN  Bing

doi:10.11764/j.issn.1672-1926.2011.05.760

Natural Gas Geoscience >

2011 , Vol. 22 >Issue 5: 760 - 769

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.05.760

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Sedimentary Facies of Mingyuefeng Formation in Oujiang Sag,East China Sea Basin

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1.Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences,Lanzhou 730000,China;
2.Graduate School of Chinese Academy of Sciences,Beijing 100049,China;
3.Beijing Research Center of CNOOC China Ltd.,Beijing 100027,China

Received date: 2011-03-16

Revised date: 2011-08-15

Online published: 2011-10-10

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Abstract

By means of cores description,well log,logging,paleontology,heavy minerals,and seismic facies,we elucidate the material source of Mingyuefeng Formation in the Oujiang sag,and then comprehensively discuss sedimentary facies and its features,based on structural evolution and relative sea level change.At late Paleocene Mingyuefeng Phase,the Oujiang sag experienced the fault switching sag,the source sediments were transported from two sides of sag,the main source was Mingzhe structural belt in the western sag,and the second was Yandang low bump in the eastern.When the large-scale transgression at middle and later Palaeocene caused the relative sea level rising,the Yandang low bump started accept the sediments and reached the biggest sedimentary area.The sedimentary facies of the sag are representative of seashore and shallow sea,with the abundance of sediment supply from the Mingzhe structural belt.Three large\|scale delta sediments were formed at the western slope of sag,where the seashore sediment lie at the margin of sag,and th-shallow sea sediment was located in the centre of sag.The distribution of sedimentary facies is mainly controlled by structure and the of relative sea level change,especially the later.
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Key words： Material source; Sedimentary facies; Sedimentary feature; Mingyuefeng Formation; Oujiang sag

Cite this article

CHEN Guo-Jun, LI Chao, LIANG Jian-She, WANG Qi, LV Cheng-Fu, ZHANG Jin-Wei, DU Gui-Chao, TIAN Bing . Sedimentary Facies of Mingyuefeng Formation in Oujiang Sag,East China Sea Basin[J]. Natural Gas Geoscience, 2011 , 22(5) : 760 -769 . DOI: 10.11764/j.issn.1672-1926.2011.05.760

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