油气成藏动力学及油气运移模型

MIGRATION MODELS AND POOL-FORMING DYNAMICS

油气成藏动力学指在某一特定的地质单元内，在相应的烃源体和流体输导体格架下，通过对温度，压力（势），应力等各种物理，化学场的综合定量研究，在古构造发育的背景下历史地再现油气生，排、运，聚直至成藏全过程的多学科综合研究体系，它的研究对象可以是单一的含油气系统，也可以是多个相关含油气系统的组合，甚至可以是与某一油气藏形成有关的某些地质单元，三维烃源体与油气输导体系的建立是油气成藏动力学研究的基础，温度，压力（势），应力等物理，化学场是流体运移的动力，在不同物理，化学场和不同流体输导条件下，烃类运移运动学模型的建立是研究的核心，有了各种边条件下烃类运移运动学模型，就可以在三维流体输导体系构造发育历史模拟的基础上，实现烃类生，排，运聚历史的模拟，从而揭示各种成藏规律，将石油地质研究提高到追踪油气运移路径，估算运聚量的新高度，为油气勘探提供全新的概念和有效的研究方法及工作手段，文内提出了宏观油气运移的概念模型，并由此导出了重要的油气运移概念。

Pool-forming dynamics is a synthetic research system of multi-disciplines to reconstruct hydrocarbon generation,expelling,migration and accumulation,under the framework of source rock bodies and fluid carrier systems and the paleo-structural development background in a certain geological unit,which is based on the quantitatively study of physical and chemical fields including temperature,pressure (potential) and stress. Its study objects could be a single petroleum system,or an assemblage consisted of several related petroleum systems,even some geological units related to the formation of a certain oil and gas accumulation. The construction of three-dimensions source rock bodies and fluid carrier systems is the foundation of the study of the pool-forming dynamics. The physical and chemical fields including temperature,pressure (potential)and stress are the dynamic forces for fluid migration. The key of the study is to establish the kinematic models of hydrocarbon migration under different physical and chemical fields and different fluid carried conditions. The historical modeling of hydrocarbon generation,expelling,migration and accumulation can be carried out based on the structural development historical modeling of three-dimensions fluid carrier systems,given the marginal conditions of kinematic models of hydrocarbon migration. This reveals the hydrocarbon accumulation characteristics and raises the petroleum geological study to a level of tracing hydrocarbon migration route and estimating its migration-accumulation amount,thus providing novel concepts and approach for hydrocarbon exploration. In this paper the macro-models of hydrocarbon migration are put forward,from which the important concepts of hydrocarbon migration have been derived.