Based on the direction of sources and the ratios of sandstone to formation of sedimentary rocks, together with the sedimentary structures and textures, paleocurrent direction and the characteristics of paleontology, etc.
以物源方向和沉积岩砂／地比值为基础，结合沉积结构构造、古水流方向及古生物特征等，编制了研究区各期次的沉积相平面图，以识别优势相展布和沉积环境演化。
参考来源 - 鄂尔多斯盆地西北部上古生界沉积体系与层序地层学研究·2,447,543篇论文数据，部分数据来源于NoteExpress
古水流方向与物源分析研究表明，延长组长4 + 5期，有东北部和西南部两个主物源方向。
Research on paleocurrent directions and provenances indicate northeast and southwest direction are the two major sediment resources of Chang 4 + 5oil-bearing bed.
河道砾岩和漫流砾岩中层理的收敛方向及硅化木走向均表明本区古水流方向为近北西—东南向。
The convergence direction of bedding and the strike of petrified wood in the channel deposits and sheetflood deposits show that the paleocurrent flowed from northwest to southeast.
通过应用举例，证实该方法准确、迅速、有效，为现场工作人员提供了快速确定古水流方向的经验。
It proves by the examples that the method is correct, fast and effective, it can provide experience for wellsite operators to determine palaeo water flow direction quickly.
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