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上二叠统山西组是鄂尔多斯盆地中东部的一套重要的含油气层系。研究山西组物源方向对于预测能源勘探开发方向具有重要意义。通过对砂岩中碎屑岩成分特征、碎屑粒度变化特征分析,得出大量分析化验数据,结合盆地周缘古陆特征,对山西组物源进行精细研究。研究结果证实,鄂尔多斯盆地中东部山西组具有东北部和南部两个物源方向,东北部物源相较于南部物源影响范围大。
The Upper Permian Shanxi Formation is a set of important petroleum-bearing strata in the central and eastern Ordos Basin. Studying the source direction of Shanxi Formation is of great significance for predicting the direction of energy exploration and development. Based on the characteristics of the clastic rocks in the sandstone and the characteristics of the granularity of the debris, lots of analytical laboratory data were obtained. Combining with the characteristics of the ancient continents in the periphery of the basin, the source of the Shanxi Formation was studied. The results of the study confirm that the Shanxi Formation in the eastern and middle parts of the Ordos Basin has two provenance orientations in the northeast and south, and the northeastern provenance has a greater impact than the southern provenance.