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Sedimentary Characteristics of Nantun Formation in Hunan Area of Hailar Basin
详细信息   
摘要

Comprehensively integrating the core samples, mud and well loggings and seismic data and so on, on the basis of the seismic cross-sections tracing and well-connected section contrast, No. 1 and No. 2 Members i. e. Kl n1 and K1 n2 } are further classified into five cycles for Nantun Formation in Hunan area of Hailar Basin with the help of well-seismic connected analysis. At the same time, the sedimentary characteristics and facieses are contrasted and analyzed for each cycle. The study shows that Member K1 nj takes alluvial plain, fan delta and shoreshallow lacustrine facies as the primary forms while Member K1 n2 indicates fan delta, braided river delta, shore shallow-lacustrine facies and swamp facies as main types; many coal beds are well developed in the latter and alter-nately distributed with dark mudstone, finally coal-measure hydrocarbon source rock is generated; the physical properties are much better for the reservoirs in the delta front of two cycles on the top of Member K1 n2.

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