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以乐山—龙女寺古隆起新元古界震旦系灯影组为对象,研究古隆起演化与其油气成藏过程的关系。乐山—龙女寺古隆起经历了多期构造运动:桐湾(Ⅰ幕、Ⅱ幕)运动控制着灯影组古岩溶的发育,加里东运动期形成了古隆起的雏形,其后海西、印支、燕山运动期古隆起总体继承发育,轴线不断由西北向东南迁移,并最终在喜马拉雅运动后定型,控制着油气成藏过程。通过流体包裹体和埋藏史研究,认为乐山—龙女寺古隆起经历了3个关键生排烃期:志留纪、早三叠纪和侏罗纪—白垩纪。伴随着乐山—龙女寺古隆起的构造演化过程,新元古界灯影组成藏经历了7个阶段:初次充注、生烃停滞、二次充注、古油藏形成、古油藏迁移、古油藏裂解及气藏形成。结合油藏数值模拟和油气勘探实践,建立了乐山—龙女寺古隆起震旦系灯影组的成藏模式,在高石1井所在的斜坡区,发育集群展布的气藏群,横向上总体表现为层状分布特征,是天然气勘探的重要领域。同时认为,以四川盆地为代表的中国新元古界含油气系统具有重要的油气勘探价值。
Taking the Neoproterozoic Sinian Dengying Formation in Leshan-Longniansi paleo-uplift as an example, the relationship between paleo-uplift and hydrocarbon accumulation process is studied. The Leshan-Long Nun Temple paleo-uplift experienced multiple tectonic movements: the movement of Tongwan (Ⅰ and Ⅱ) controls the development of paleokarst in the Dengying Formation, and the paleo-uplift formed during the Caledonian movement. Later, the Hercynian and Indosinian In the Yanshanian period, the paleo-uplift generally inherited and developed. The axis continued to migrate from northwest to southeast, and eventually formed after the Himalayan movement to control the hydrocarbon accumulation process. Based on the study of fluid inclusions and burial history, it is considered that the Leshan-Longnongsi paleo-uplift experienced three key stages of hydrocarbon generation and expulsion: the Silurian, Early Triassic and Jurassic-Cretaceous. Along with the tectonic evolution of the Leshan-Longnupu paleo-uplift, the Neoproterozoic Shade Formation has undergone seven stages: initial charge, hydrocarbon stagnation, secondary charge, paleo-reservoir formation, paleo-reservoir migration, Paleogene reservoir cracking and gas reservoir formation. In combination with reservoir numerical simulation and oil and gas exploration practice, a gas accumulation model of the Sinian Dengying Formation in Leshan-Longniansi paleo-Long was established. In the slope area where Gaoshishi 1 is located, The characteristics of stratified distribution, is an important area of natural gas exploration. At the same time, it is believed that the Neoproterozoic petroleum system represented by Sichuan Basin has important oil and gas exploration value.