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四川盆地构造图像极为清晰,圈闭类型繁多,普遍存在上、下构造形态、位置、圈闭大小和高度不协调或不吻合之特点。本文根据四川盆地沉积盖层岩石物理力学试验,使用800余块岩样试验参数和盆地内近百个局部构造的地震勘探资料,并综合地质、地球物理及航磁资料。从盖层岩性组合、岩石力学性质及基底结构特征,探讨了盆地构造垂向变异特征、类型及其机理,受其变质基底结构、沉积盖层组成、古构造和边界条件等因素的影响。
The tectonic images in Sichuan Basin are extremely clear, with many types of traps. There are common features of upper and lower tectonic forms, locations, trap sizes and heights that are not consistent or inconsistent. Based on the petrophysical tests of the sedimentary cover in the Sichuan Basin, this paper uses over 800 block test parameters and nearly 100 locally-constructed seismic exploration data in the basin and synthesizes geological, geophysical and aeromagnetic data. Based on lithologic assemblage, rock mechanical properties and basement structure characteristics of the caprock, vertical variation characteristics, types and mechanism of the basin structure are discussed. Influenced by factors such as metamorphic basement structure, sedimentary capstones, palaeostructure and boundary conditions,