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四川盆地川西坳陷蕴藏有丰富的天然气资源 ,通过多年的勘探 ,发现其成藏聚集规律复杂 ,利用天然气运移模拟研究能有效地降低钻井风险。通过适合川西坳陷地质特征的二维沉积史、地热史、生烃史的模拟 ,证实了川西坳陷存在两个生烃高峰期 (三叠纪末和侏罗纪末—白垩纪 ) ,模拟出相应于两个生烃高峰期时的古构造 ,明确了砂岩的致密化进程 ,采用动态运移模型使得天然气运移模拟更加精确 ,并提出几个有利勘探区
The Sichuan Basin West Sichuan Depression is rich in natural gas resources. Through years of exploration, it is found that the accumulation and accumulation laws are complex. Using natural gas migration simulation can effectively reduce the risk of drilling. Through the simulation of two-dimensional sedimentary history, geothermal history and hydrocarbon generation history that are suitable for the geological characteristics of the western Sichuan depression, it is confirmed that there are two peak periods of hydrocarbon generation (Late Triassic and Late Jurassic-Cretaceous) in the western Sichuan depression. Corresponding to the palaeostructures during the two peak periods of hydrocarbon generation, the process of densification of sandstone is clarified. The dynamic migration model makes the simulation of gas migration more accurate, and several favorable exploration areas are proposed