油气二次运移动力学分析及实验研究

THE MECHANICAL ANALYSIS AND EXPERIMENTAL RESEARCH OF SECONDARY HYDROCARBON MIGRATION

碎屑岩储层的孔、渗特性对于油气二次运移、聚集和成藏具有重要的影响,不同层位的碎屑岩储层具有不同的孔隙结构和成藏阻力,不同构造部位的油气成藏具有不同的成藏动力,成藏动力与储层自身的孔、渗特性共同决定了油气运移、聚集、成藏的过程。文中针对油气二次运移和聚集的动力和阻力进行了理论分析和计算,重点对浮力为动力的油气运移开展了系统的物理模拟实验,通过大量的对比实验,分析了油气二次运移的不同控制因素,为圈闭的成藏分析和评价提供了实验参考。

Characteristics of the clastic rock reservoir porosity and permeability have important influence to the secondary hydrocarbon migration and accumulation. Different layers of the reservoir rocks have different pore structure and accumulation resistance, and oil and gas reservoirs in different structural positions have different reservoir forming dynamics. The reservoir forming dynamic, together with the reservoir porosity and permeability characteristics determine the oil and gas migration, accumulation and the process of reservoir formation. In this paper, the authers analyed and calculated dynamic and resistance of the secondary hydrocarbon migration and accumulation, then carried out a systematic physical simulation experiment on the focus of the buoyancy as a driving force of the oil and gas migration, and analyzed different controlling factors of the secondary hydrocarbon migration. The works of this paper laid the foundation for carrying out physical simulation of the structural deformation and hydrocarbon migration, and also was the experimental reference for the reservoir formation analysis and evaluation.