四川盆地动力学演化与油气前景探讨

四川盆地是特提斯构造域巨型油气富集带中一个大型古生代-中新生代海相-陆相叠合盆地，其形成与演化受特提斯构造域与滨太平洋构造域控制。研究表明四川盆地的形成演化曾经历了中-晚元古代扬子地台基底形成阶段；震旦纪-中三叠世被动大陆边缘阶段；晚三叠世盆山转换与前陆盆地形成演化阶段；侏罗纪-第四纪前陆盆地沉积构造演化阶段。盆地内古生代-中生代广泛发育良好的烃源岩，而且形成多套生储盖组合，发育大型构造圈闭，储集层、盖层及保存条件相对较好，具有再次发现大中型油气田的条件。

DISCUSSION ON GEODYNAMIC EVOLUTION AND OIL/GAS PROSPECT OF THE SICHUAN BASIN

The Sichuan Basin, a large Paleozoic and Meso cenozoic era marine and continental basin, is situated between Tethys tectonic domain and marginal Pacific tectonic domain, which control its formation and development. It has undergone a complicated development process divided into four stages as follows: ①the crystal basement of Yangtze platform form stage since Meso Proterozonic Neo Proterozonic; ②passive continental margin cabonate rock platform stage since Sinian and Middle Triassic period; ③foreland basin development and sediment in Upper Triassic; ④foreland sediment and tectonic evolution since Jurassic Quaternary. Source rock in the Basin developed very well in the period between Meso Paleozoic and Mesozoic, where many sets of "source reservoir cap" assemblage had been formed. The Sichuan Basin, with the developed traps, matured source rocks with good preserving abilities, has provided good conditions for discovering middle and large gas fields.