龙门山前中段地震剖面的构造分析

磁峰场一鸭子河构造属于青藏高原东缘的龙门山山前中段推及构造单元，其下盘隐伏着众多的油气构造圈闭，是前陆盆地山前油气勘探的重要目标。应用现代构造地质学的几何变形解析方法，来搭建磁峰场一鸭子河地震勘探区地表至深部的构造变形类型、构造叠加组合样式以及相应的构造模型;以正演平衡地质剖面技术为手段，验证构造模型的合理与否，同时再现龙门山中段山前的构造演化过程;在构造建模的基础上对磁峰场一鸭子河构造进行了三维构造分析，配以计算机可视化成图技术，构建出三维构造模型。

THE STRUCTURE ANALYSIS OF TWO-DIMENSIONAL SEISMIC PROFILE TO THE MIDDLE SECTION OF LONGMEN MOUNTAIN ANTERIOR MARGIN

Cifengchang-Yazihe structure is the thrust unit of middle section of Longmen Mountain anterior area adjacent to the east margin of Tibetan plateau. There were plenty of perdu hydrocarbon tectonic traps in its footwall, and it's the very important exploration destination on the hill side of foreland basin. By applying the geometry deformation methods of modern tectonics，we built up the structure deform types and assemble style of Cifengchang-Yazihe seismic exploration area from the deep subterranean to the ground，so does the corresponding structure mode. By means of geologic profile forward modeling technique，we validated the rationality of the structure mode, representedthe process of structure evolution happened in the anterior area of middle section of Longmen Mountain. Using visible computer mapping techniques, we analyzed the three-dimensional charac-teas of two dimensional seismic work area, and built the three-dimensional mode.