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三叠系是塔里木盆地最具勘探价值的层系之一,因此对其进行剥蚀厚度恢复及原型盆地研究,可以进一步查明三叠系沉积相带分布、盆地格架以及勘探前景预测等问题,对塔里木盆地勘探具有重要意义。本文提出一种基于地震资料的构造—沉积综合分析,进行剥蚀厚度恢复的方法。通过对大量地震资料和钻井资料分析,对塔里木盆地三叠系剥蚀厚度进行恢复,认为塔里木盆地塔西南地区曾经沉积较厚的三叠系,三叠纪原型盆地可能是受北昆仑和南天山对挤形成的两个前陆盆地,即库车前陆盆地和北部前陆盆地。
Triassic is one of the most valuable strata in the Tarim Basin. Therefore, the restoration of denuded thickness and the study of prototype basins can further clarify the sedimentary facies distribution in the Triassic, the basin shelf and the prediction of exploration prospects. It is of great significance to exploration in Tarim Basin. This paper presents a method based on the tectonic-sediment comprehensive analysis of seismic data to recover the denudation thickness. Through the analysis of a large amount of seismic data and drilling data, the Triassic denudation thickness in the Tarim Basin is restored. It is considered that the thick Triassic sediments have been deposited in the southwestern Tarim Basin, and the Triassic prototype basins may be influenced by North Kunlun and South Tianshan pairs The two foreland basins formed by extrusion are the Kuqa foreland basin and the northern foreland basin.