盆地古水动力体系演化定量模拟方法

A QUANTITATIVE MODEL OF THE PALEOHYDRODYNAMIC FIELD EVOLUTION HISTORY OF A BASIN

在盆地演化过程中，地下水动力体系的演化在很大程度上控制了盆地油气的分布。这方面已有很多定性的或静态的研究。本文根据渗流力学等理论，从演化史的角度讨论定量的、多因素的、动态的水动力体系演化数值模拟方法，计算出与油气成藏密切相关的压力场、流速场和流向场。开展这方面的研究有助于丰富盆地定量分析方法，深化有关水动力体系演化及相关油气成藏的地质认识。

In the evolutionary process of a basin the evolution of paleohydrodynamic field controls the oil gas distribution of the basin to a large extent. There have been many qualitative or static researches on it. In the paper, the preferred numerical simulation method of the evolution of hydrodynamic system which is quantitative, of multi-factors, or dynamic is discussed according to the theory of vadose mechanics etc. from the view of evolution history. And the calculation for the pressure field, flow velocity field and flow direction field closely relative to hydrocarbon reservoir is presented in it. Researches at this aspect can contribute to enriching the methods of qualitatively analysing basins and deepening the understanding of geological knowledge relative to the evolution of hydrodynamic system and hydrocarbon reservoir.