断陷盆地油气系统的成因——动态评价方法

提出了强调油气运移的油气系统分类评价方案 ,即用有效源岩充注、运移活跃程度、运移排烃方式、捕集条件和保存条件五个要素 (简称 AMMEP)来描述评价油气系统 .该方法大大增强了油气系统研究的实用性 ,可以有效评价油气系统的优劣并进行资源评价、预测有利区带和勘探层位、制订相应的勘探部署策略 .在进行油气资源评价时 ,不仅要考虑源岩的丰度、演化等因素 ,更要充分考虑源岩破裂、运移活跃程度、运移方式等 ,综合评价油气系统 ,才能给出有充分地质依据的运聚系数 ,从而有效指导油气勘探 .

A Genetic-dynamic Evaluation Approach to the Petroleum Systems in Downfaulted Basin

An approach is put forward for the classification and the evaluation of the petroleum systems. There are five evaluation element factors in it, that is, active charge, migration activity, migration drainage, entrapment,and preservation. The approach can make the study of the petroleum systems more practical, and by it, the evaluation of resource, the prediction of favourable region and horizon, and the determination of exploration strategy can be finished well. In the evaluation of petroleum resource, not only the abundance and evolution of source rock, but also its cracking, activity and migration form are considered.