Abstract: The basic principal of petroleum migration-accumulation fluid dynamic system analysis consists of firstly dividing the studied basin into different fluid dynamic systems, and then assessing petroleum migration-accumulation conditions of each system according to its type. This principal is applied to western Qaidam Basin which was vertically divided into three petroleum migration-accumulation fluid dynamic systems,including N₂3-N₂2-N₂1、N₂1-N₁-E₃² and E₃²-E₃¹.These systems belong respectively to gravity-driven flow type, compaction-driven flow type and fluid compartment type. Petroleum migration-accumulation conditions are studied in the three systems. It is indicated that the further exploration should be focused on two layers, that is, N₁ and E₃¹.

Key words: petroleum migration-accumulation, fluid dynamic system, pressure, temperature, petroleum exploration, Qaidam Basin

摘要： 油气成藏流体动力系统分析的基本原理是在一个含油气盆地内划分出不同的流体动力系统,并按每个系统的类型,研究其成藏条件.该原理应用到柴达木盆地西部,在柴西地区纵向上比较典型地划分出N32—N₂2—N₁2、N₁2—N₁—E₃²和E₃²—E₃¹三个油气成藏流体动力系统,它们分别为重力驱动型、压实驱动型和封存型系统,分析了这三个系统的成藏条件,指出应把N₁2—N₁—E₃²系统中的N₁层系和E₃²—E₃¹系统中的E₃¹层系作为今后主要的勘探目标层系.

关键词: 流体, 动力系统, 压力, 温度, 油气勘探, 柴达木盆地