Sedimentary facies recognition using lithological statistics ——Example from delta deposits of Pearl River Mouth Basin
Yu Ye1,2, Zhang Changmin1,2, Zhang Shangfeng1,2, Shi Hesheng3, Du Jiayuan1,2,3, Zhu Rui1,2
1 School of Geosciences，Yangtze University，Jingzhou 434023，Hubei 2 MOE Key Laboratory of Oil and Gas Resource and Exploration Technology，Yangtze University，Jingzhou 434023，Hubei 3 Shenzhen Branch of CNOOC Ltd.，Guangzhou 510240，Guangdong
Abstract The traditional research approaches for sedimentary facies are affected by artificial subjective factors.For the same sedimentary structure，curve shape and seismic reflection characteristics，different people have different views.But lithologic characteristics are doubtless，and these data are easy to obtain by instrumental measurement.Therefore，the use of lithologic data to distinguish sedimentary facies，can avoid differences which are caused by artificial subjective factors in identifying sedimentary facies indicators.The well logging lithological interpretation results from the Neogene deltaic deposits of Pearl River Mouth Basin have been used to measure the thickness and layer number of these different lithology.Statistic shows that there are close relations among the single layer thickness，formation thickness rate and other characters of these strata，the variation of these characters are close related to subfacies of the deltaic deposits.The subfacies can be distinguished quantitatively by the use of these relations，such as crossplot，triangular diagram and boxplot.The critical parameters and diagrams for different subfacies have been used to recognize the facies of other wells which are not to be used to calculate the criterion.The result shows the correctness is above 75％，and the method is basically feasible that using lithological statistics to recognize deltaic subfacies.These results may provide an available approach to the quantitative study of sedimentary facies.
About author: Yu Ye，born in 1983，is a Ph.D.candidate of Yangtze University，majors in mineral resource prospecting and exploration，and is mainly engaged in sedimentology and sequence stratigraphy.Address: 3RG，School of Geosciences，Yangtze University，Jingzhou，434023.Tel: 13872260239.E-mail:yuye1983@163.com.
Cite this article:
Yu Ye,Zhang Changmin,Zhang Shangfeng et al. Sedimentary facies recognition using lithological statistics ——Example from delta deposits of Pearl River Mouth Basin[J]. JOURNAL OF PALAEOGEOGRAPHY, 2011, 13(3): 271-277.
Yu Ye,Zhang Changmin,Zhang Shangfeng et al. Sedimentary facies recognition using lithological statistics ——Example from delta deposits of Pearl River Mouth Basin[J]. JOPC, 2011, 13(3): 271-277.
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