• 责任者：Ma Dewen (State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Qiu Nansheng
• 刊名：Journal of Earth Sciences and Environment
• 出版年：2012
• 卷期：34(2)
• 关键词：原油 ; crude oil ; 裂解气 ; cracked gas ; 四川盆地 ; Sichuan Basin
• 页码：p.49-56
• 图表：illus., 39 refs.
• 分类号：1003
• issnNo：ISSN1672-6561
• isbnNo：CN61-1423/P

In order to sure the favorable area of oil cracking gas in Sichuan Basin, the thermal evolution history of Sichuan Basin was reconstructed by geothermometer of vitrinite reflectance, and the distribution and evolution characteristic of favorable geothermal field for oil cracking gas reservoirs in Feixianguan Formation of Lower Triassic were determined. The results showed that the heat flow evolution after Triassic was inconsistent in different tectonic units in Sichuan Basin; the heat flow was lowest in Northeast Sichuan, low in Central Sichuan, highest in Northwest Sichuan and West Sichuan during main geological ages, and the differences were mainly caused by the uplift of Qinghai-Tibet Plateau and basalt mantle plume of Emei Mountains; the heat flow was significantly higher during Permian than other periods, but the duration was short because of the magmatic intrusion; the distribution of favorable geothermal field for oil cracking gas in Triassic Feixianguan Formation was ever changing; the distribution was almost over Sichuan Basin at the end of Jurassic, and reduced at the end of Cretaceous, and continually reduced to West Sichuan and part of Central Siehuan, and was smallest and mainly in part of West Sichuan now; the distribution of oil cracking gas was mainly controlled by paleogeotherm, especially the geothermal field with highest geological temperature, but it had little relationship with contemporary geothermal field.