This paper analyses the evolution of the palaeostructure in the Yanshan period in Sichuan Basin by paleo-geotemperature. The main structural development of the Yanshan movement is from Late Jurassic period to Early Cretaceous, and eventually formed the tectonic framework of three paleo-uplifts and three palaeo-depressions in Sichuan Basin. The three palao-uplifts are the Longmen mountain piedmont paleo-uplift, Central Sichuan paleo-uplift, and Huaying mountain-Eastsouth Sichuan paleo-uplift. The three paleo-depressions are the north palaeo-depression, west palaeo-depression and east paleo-depression. The three paleo-depressions link and surround the paleo-uplift. This tectonic framework is not only conducive to petroleum accumulation, but also has an important effect on forming the continental red-bed secondary gas reservoir. So it is important to research the palaeostructure in Yanshan period of the Xujiahe reservoir and the secondary gas reservoir formation in the west of Sichuan Basin.%利用R.及古地温等资料重建地层的方法,对四川盆地燕山期古构造的演化过程进行分析,恢复其古构造格局.四川盆地燕山运动的主要构造发育期是晚侏罗世—早白垩世,最终形成了三隆三拗的构造格局,即龙门山山前古隆起、川中古隆起、华蓥山—川东南古隆起和川西拗陷、川北拗陷、川鄂擞陷,3个拗陷连在一起形成了以川中、川东南隆起为中心的西、北、东半环状的拗陷的围绕,龙门山山前隆起带则沿龙门山分布.该构造格局的形成,特别是形成的燕山期古隆起对于油气的富集有很重要的指向性,同时对于陆相红层次生气藏的形成也有重要的影响.
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