三维古地貌重建技术在中生代羌塘地体古地理演化分析中的应用

近年来，从古地貌-沉积组合与油藏关系的角度进行油气远景评价成为研究热点。针对古地貌的复原研究，提出一种建立三维古地貌模型的方法，将二维平面古地理图通过对资料的整理、挖掘与转换，并结合GIS技术生成了三维立体模型，补充了区域地形地貌的相关信息。利用该方法，建立了青藏高原油气资源潜力最大的区域——羌塘地体在三叠纪和侏罗纪的一系列三维古地貌模型，进而对其古环境和演化过程进行分析，这对于该区域的沉积矿产资源的预测与评价有重要的参考价值。

The application of the technology for three-dimensional reconstruction of ancient landform in the Mesozoic paleographic evolution of Qiangtang terrane, Tibet

In recent years, the evaluation of petroleum prospective has become a hot research topic from the aspect of the relationship between the ancient landform-sedimentary assemblage and the oil reservoir. Aimed at the restoration of ancient landform, the authors put forward a method for building three-dimensional reconstruction model of the ancient landform. Meanwhile, in combination with the GIS technology, 3D stereo model was created by reshaping, tapping and converting data of 2D plane paleographic chart. A series of 3D Jurassic and Triassic landform models were built by this method for Qiangtang terrane, the largest petroleum resource potential region in Qinghai-Tibetan Plateau. Moreover, the paleographic evolution process of this region was analyzed, and the results obtained are of great reference value in the prediction and evaluation of sedimentary mineral resources in this region.