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油气二次运移的方式和方向对具体指出盆地油气资源量所赋存的位置有决定性的意义。在运载层中推动油气运动的作用力主要是浮力和毛细管力,而盖层则起着毛细管阻力作用。因此盖层的形状及空间分布就成了影响运移路径重要的封盖因素。该文试图根据盖层的几何形状特性,建立运移路径模拟模型,开发微机软件运行实施。在一个具体盆地进行运移路径模拟应用的结果反映,与已知勘探情况基本符合,能够检验油气期次性运移的地质概念,可以揭示运移过程,预测可能的运移聚集位置。
The mode and direction of the secondary migration of oil and gas have a decisive significance to the specific existence of the hydrocarbon resources in the basin. The main forces driving the hydrocarbon movement in the transport layer are buoyancy and capillary forces, while the cap layer acts as a capillary resistance. Therefore, the shape and spatial distribution of the cap layer have become important capping factors that affect the transport path. According to the geometrical characteristics of the cover, this paper attempts to establish a simulation model of the migration path and develop the implementation of the computer software. The results of simulated application of migration path in a specific basin reflect the geological conception that is consistent with the known exploration conditions and can test the periodic migration of oil and gas. It can reveal the migration process and predict the possible migration and accumulation sites.