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1)  the lower section of T3X4
须四下段
2)  member 2~(th) and member 4~(th) of xujiahe formation
须二、四段
3)  Xu 4 member
须四段
1.
The genesis of the Triassic Xu 4 Member sand body in central Sichuan and its influence on oil and gas migration
川中地区上三叠统须四段砂体成因及对油气运移影响分析
2.
The sandbody of Upper Triassic Xu 4 member in central Sichuan basin is thick,continuous sedimentation,and characterized by shore-shallow lacustrine-delta front-delta plain which is proximal.
川中地区上三叠统须四段砂体厚度大,沉积稳定,为近物源区的三角洲沉积特征。
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4)  the fourth member of Xujiahe formation(T3x4)
须家河组四段
1.
Calcarenaceous sandstone is widely distributed in the fourth member of Xujiahe formation(T3x4) in West Sichuan Depression,and it can be seen in every structure and well.
钙屑砂岩在川西坳陷须家河组四段分布特别广,几乎每个构造、每口井都能见到。
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5)  the lower member of ES4
沙四下段
6)  middle and lower Es4
沙四中下段
补充资料：四下
1.指四蹄。 2.四边低垂;四边低下。 3.四下里，四处。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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