鄂尔多斯盆地高桥地区上古生界储集砂体叠置关系及分布定量刻画

doi:10.11743/ogg20130604

Abstract

Abstract: In order to quantitatively characterize the spatial and temporal distribution characteristic of superimposed reservoir sandbodies,drilling core data,logging data,and test data are integrated to analyze the superimposeition relationship and sandbodiesbody size of the Upper Palaeozoic in Gaoqiao region of Ordos Basin.The superimposition styles of sandbodies in the Shanxi-Xiashihezi formations in the study area include scouring-cutting type(truncated channel sandbodies),scouring-contact type(complete channel sandbodies)and continuous transitional contact type(isolated channel sandbodies).Distributions of sandbodies formed in different periods are different.Sandbodies in the Shanxi Formation are relatively narrow,showing a banding distribution.In contrast,the very thick sandbodies consisting of superimposed distributary channels of multi-stages in the 8^th member of the Shihezi Formation feature in laterally continuous and large scale distribution.Based on core measurement,we calculated the channel water depth range of bankfull stage,single sandbody thickness,single channel width and river width in the 2^nd member of Shanxi Fm,the 1^st member of Shanxi Fm and the 8^th member of Shihezi Fm.The rivers in meandering river delta in the 2^nd member of Shanxi Fm has a width of 700-1 500 m,the rivers in meandering river delta in the 2^nd member of Shanxi Fm has a width of 600-1 200 m,and the braided rivers in the upper and lower 8^th member of Shihezi Fm have a wide of 1 000-2 000 m and 750-1 600 m respectively.

Key words: superimposition relationship of sandbodies, reservoir sandbody, Upper Paleozoic, Gaoqiao region, Ordos Basin

CLC Number:

TE122.2

Tian Jingchun, Zhang Xingliang, Wang Feng, Chen Rong, Lin Xiaobing. Quantitative characterization of superimposition relationship and distribution of reservoir sandbodies in the Upper Palaeozoic of Gaoqiao region, the Ordos Basin[J]. Oil & Gas Geology, 2013, 34(6): 737-742,815.

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Quantitative characterization of superimposition relationship and distribution of reservoir sandbodies in the Upper Palaeozoic of Gaoqiao region, the Ordos Basin

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