南堡凹陷南部沙一段控砂模式

doi:10.13278/j.cnki.jjuese.201602104

Abstract

Abstract:

The structural characteristic of Nanpu sag basin is complex, and the sandbody distribution varies in time and space. In order to determine the sandbody distribution pattern, the analysis of core facies with structural and sedimentary background in gentle slope zone was conducted to identify and interpret the braided delta front sandstone. According to the establishment of the sequence stratigraphy framework, sedimentology, and seismic geological interpretation, the distrution of sandbodies in Nanpu sag was controlled by two kinds of synsedimentary fault slope-break belts, including the source direction fault slope-break belts that controlled the sediment transport channel and the sedimentary enrichment space, and the reverse source fault slope-break belts that changed the flow direction and prevented lateral sediment transport. Thus, the sandbody development model of the First Member of Shahejie Formation in Paleogene in the south area of Nanpu sag is concluded and characterized as "Shaleitian salient providing the sands source, the groove and faulted trough transporting sands, the reversed slope-break zone and convex limiting the space, the distributary channel underwater in the braided delta front controlling the spatial distribution, and the slope-break zone determining the gathering of sands".

Key words: Nanpu sag, gentle slope zone, First Member of Shahejie Formation, faulted trough, reversed slope-break zone, sandbody development model

CLC Number:

P544.4

Du Qingxiang, Guo Shaobin, Cao Zhonghong, Zhang Xiaolong, Li Yuanshu. Sandbody Development Model of the First Member of Shahejie Formation in Paleogene in Southern Nanpu Sag[J].Journal of Jilin University(Earth Science Edition), 2016, 46(2): 348-357.

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Sandbody Development Model of the First Member of Shahejie Formation in Paleogene in Southern Nanpu Sag

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