【摘要】 本文在研究四川盆地的古地温及古地温梯度、恢复各构造时期被剥蚀地层厚度、建立油气各演化阶段门限值计算公式的基础上,比较系统地对四川盆地各生油岩系的有机质在各构造时期的动态演变规律进行了分析和探讨。印支早期和燕山中、晚期是成油成气的重要时期,其同期圈闭则可优先捕获油气,占据储集空间。从地球化学角度指出了油气勘探和开发较有利的远景区。更多还原

【Abstract】 On the basis of comprehensive study of paleogeotherm,paleogeothermal gradients, denudation thickness of different tectonic movement and threshold temperatures of each evolutional stages, a dynamic model of organic matter evolution in source beds of Sichuan Basin has been discussed for Caledonian, Hercynian, Early Indosinian, Yanshanian and Himalayan periods. It is established that the early Indosinian （T, to T₂） and the middle-late period of Yanshanian （J₂ to K₁） are the main periods for oil-gas generating.Traps formed at these periods were favourable in catching oil and gas by filling the reservoir space.Prospective areas of oil-gas exploration and development are indicated.更多还原