鄂尔多斯盆地高桥地区上古生界致密砂岩储层非均质性特征

Abstract

Abstract: The heterogeneity characteristics of the Paleozoic tight sandstone reservoirs in Gaoqiao area of Ordos Basin are studied in detail in this paper by using core data,logging data,and test data.The results show that there is a close relationship between heterogeneity and sedimentation of the Shanxi Formation and Xiashihezi Formation sandbodies.The sandbodies formed by vertical accretion show vertical positive rhythm or flanges positive rhythm with no obvious trend.In contrast,those sandbodies formed by lateral accretion show strong vertical positive rhythm.Sandbodies formed by progradation have apparent vertical anti-rhythm.Sandbodies of overland flow deposition display little change or a slight vertical counter-rhythm.He8 and Shanxi Fm reservoirs show strong intralayer heterogeneity.The heterogeneity of Shan2 segment is stronger than that of Shan1,while the heterogeneity of lower He8 segment is stronger than that of upper He8 segment.Among these four sub-layers,the upper He8 segment is most homogeneous.Interlayer heterogeneity significantly varies among different layers.He8 segment and Shanxi Formation also show strong lateral reservoir heterogeneity in Gaoqiao area.

Key words: sedimentation, heterogeneity, tight reservoir, Upper Paleozoic, Gaoqiao area, Ordos Basin

CLC Number:

TE121.1

Tian Jingchun, Liu Weiwei, Wang Feng, Chen Rong, Lin Xiaobing. Heterogeneity of the Paleozoic tight sandstone reservoirs in Gaoqiao Area of Ordos Basin[J]. Oil & Gas Geology, 2014, 35(2): 183-189.

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Heterogeneity of the Paleozoic tight sandstone reservoirs in Gaoqiao Area of Ordos Basin

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