沉积盆地的突变特征及尖点突变模型的应用研究

摘要

以云南第三系盆地为例，详细论述了沉积盆地构造、沉积的复杂多变性及成藏的特殊性 。沉积盆地的复杂多变性使沉积盆地具有剖分性、平衡特征的复杂多变性以及不连续的突变 性等特征，这些特征与尖点突变特征相似或相近，建立起与尖点突变模型的关系，并利用反 映沉积盆地多种突变特征的地震反射序列来检测其是否突变和突变程度，从而，可获得沉积 盆地结构和地层介质结构的变化情况以及油气分布。良好的应用效果表明，尖点突变模型为 油气勘探提供了可靠的新方法技术。%Based on the Tertiary basins in Yunnan Province, China, this paper describes in detail the complex variation feature of the structures and sedimentation in t he Tertiary basins and the speciality of a play-forming model. Due to the complex var iation of the sedimentary basins, the basins are characterized by dissection, balanced c omplex variation and discontinuous catastrophe. These features are approximate t o th e cusp catastrophe, proposing the relationship to the cusp moelel of catastr ophe . Using the seismic reflection sequences to reflect the catastrophe features of sedimentary basins, the catastrophe and catastrophe level are detected. Therefor e, t he various information of the structures and stratigraphic medium of basin and t he distribution of the oil-gas reservoir can be obtained. The better applied re sults sho w that cusp model of catastrophe provides a new reliable technique and method fo r the oil-gas prospection.