Main Factors Controlling Differential Enrichment Of Hydrocarbons In The Basins In The Northern Margin Of The Western Asia Segment Of The Tethys Realm

Based on publicly literature,commercial databases and previous research results,systematic statistical analysis and petroleum system analysis are applied to compare and analyze the basic geological characteristics and petroleum geological characteristics of the basins in the northern margin of the Western Asia segment of the Tethyan Realm.Summarize the differences in hydrocarbons distribution,and reveal the main factors controlling the differential enrichment of hydrocarbons.The results show that:(1)The evolution of the basins in the northern margin of the Western Asia segment of the Tethyan Realm is similar.The tectonic evolution can be divided into four stages: basement stage,syn-rift stage,post-rift stage and foreland stage;(2)The distribution of hydrocarbons in the basins in the northern margin of the Western Asia segment of the Tethyan Realm has obvious zonation and stratification.Regionally,the distribution of hydrocarbons reserves in the basin is less at both ends and more in the middle,and 92.64% of the hydrocarbons reserves come from Amu-Darya basin.Vertically,the post-rift series are the most abundant series,and their proven and controlled reserves account for 97.40% of the total reserves;(3)Jurassic high-quality source rocks formed in transgressive environment in the syn-rift stage are the decisive factors controlling hydrocarbon accumulation,followed by favorable source-reservoir-seal assemblages,distribution of regional seal and the structural movement in foreland stage.