Rock texture characteristics of sandy conglomerate in the upper fourth member of Shahejie Formation in Yanjia area,Dongying sag
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TE112.23

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    Abstract:

    The internal texture characteristics of sandy conglomerate have not been understood clearly in the nearshore subaqueous fan of the upper fourth member of Shahejie Formation(Es4s)in Yanjia area,Dongying sag. Based on core delineation,the sandy conglomerate bodies are divided into 11 types of lithofacies as well as 13 types of lithofacies assemblages of Es4s in the area. The rock textures are summarized into three categories and six subcategories. Formation MicroScanner Image(FMI)chart modes of typical lithofacies are established according to core type recognition. The lithology identify curve(LIC)can be reconstituted by conventional logging data,which is calibrated by core and FMI to be used to establish LIC quantitative standards of typical rock textures. The rock texture types of a single well were identified by this method in Yanjia area. Longitudinal distribution of rock texture of sandy conglomerate was analyzed based on well-connecting profile.The vertical superposition modes of rock texture in different subfacies of the nearshore subaqueous fan were established.The analysis suggests that single stage sandy conglomerate deposit is a sequential combination of mudslide deposit,flood deposit and tractive current deposit vertically which extends towards the basin in a wedge shape and constantly retrogradestowards the boundary fault vertically.

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Wang Peng, Wang Yanzhong, Cao Yingchang, Ma Benben, Qi Mingming. Rock texture characteristics of sandy conglomerate in the upper fourth member of Shahejie Formation in Yanjia area,Dongying sag[J]. Petroleum Geology and Recovery Efficiency,2015,22(3):34~41

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  • Online: June 03,2015
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