Sedimentary Characteristics of Oligocene Lingshui Formationin Qiongdongnan Basin,South China Sea
Received date: 2013-01-25
Revised date: 2013-05-23
Online published: 2013-10-10
Qiongdongnan Basin is an important oil- and gas-bearing basin in South China Sea.In order to understand the sedimentary characteristics and space distribution of the Lingshui Formation,based on the theory of sequence stratigraphy,petroleum geology and sedimentology,this paper divides the Lingshui Formation into four third order sequences and recognizes six major sedimentary facies including braided delta,fan delta,shore,shallow marine,carbonate platform and coast plain through the core observation,logging analysis and seismic data interpretation.We also finely analyzed sedimentary features and the micro-sedimentary facies of each sedimentary facies.Integrated with the regional tectonic and the analysis of the spatial distribution feature of each sequence,we believe that regional sea level changes and the tectonic are the two major factors affecting the distribution and development of the sedimentary systems.
Key words: South China Sea; Qiongdongnan Basin; Sequence stratigraphy; Fan delta; Braided delta
ZHANG Ya-xiong,ZHU Xiao-min,ZHANG Gong-cheng,CHEN Huan-qing . Sedimentary Characteristics of Oligocene Lingshui Formationin Qiongdongnan Basin,South China Sea[J]. Natural Gas Geoscience, 2013 , 24(5) : 956 -964 . DOI: 10.11764/j.issn.1672-1926.2013.05.956
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