Abstract: Using the geology,well logging and 3-D system of seismic data,along with the spatialgridding and thermal alteration index(TAI) inversion matching for restoring the geologicaland thermal histories,three peak stages of the palaeoheat-flow are modelled.The downwardoverpressured expulsion fluid about 500m,in member l of Qingshankou formation,was quan-titatively estimated by establishing an overpressured model,modelling the history of down-ward expulsion hydrocarbons.The introduction of the fluid potential concept is used to simu-late the histories of secondary migration and accumulation so that both the predominantdownward vertical migration and the auxiliary lateral migration,in Fuyu and Yangdachengzioil-bearing formations of Songliao basin's three Zhao(Zhaodong,Zhaoyuau and Zhaozhou) troughs were characterized.

Key words: Songliao basin, simulation, grid point data, geothermal history, migration of oil and gas, fluid potential

摘要： 应用地质、测井、地震资料三维数据体,采用空间网格化和热指标反演拟合等技术,恢复地史和热史.模拟出松辽盆地有三个古热流高峰期;建立超压模型,摸拟青-段向下排烃史,定量计算出青一段靠超压向下排液深度达500m左右;引入流体势概念,模拟油气二次运移、聚集史,提出了松辽盆地三肇凹陷扶、杨油层以垂向向下运移为主,侧向运移为辅的二次运移特点.

关键词: 松辽盆地, 模拟, 网格点数据, 地热史, 油气运移, 流体势