松辽盆地南部岩性-地层油气藏成藏动力和分布规律

根据烃源岩与储集层的纵向位置关系，将岩性地层油气藏划分为源下、源内和源上3种类型。基于流体势构成特征分析，从流体动力学的角度剖析了不同类型岩性地层油气藏烃源岩与储集层之间的压能、势能关系，分别研究构成流体势的压差和势差，提出了源下成藏压差驱动、源内成藏油水压差驱动、源上成藏势差驱动的3种驱动机制。以松辽盆地南部为例，分析了源下、源内、源上岩性地层油气藏成藏动力和油气运聚机理，在此基础上进一步研究了3种类型油气藏的成藏控制因素和分布规律。图6参15

Accumulation dynamics and distribution of litho-stratigraphic reservoirs in South Songliao Basin

According to the relationship of the vertical positions between source rocks and reservoirs, the lithostratigraphic reservoirs were divided into 3 types as below-source, in-source and above-source. From the viewpoint of fluid dynamics, the relationship of the pressure energy and potential energy between source and reservoir in different lithostratigraphic reservoirs was studied based on the analysis of fluid potential composition characteristics. The pressure and potential differences, which constitute the fluid potential, were analyzed, and 3 driving mechanisms were proposed as below-source pressure difference driving, in-source fluid pressure difference driving and above- source potential difference driving. Also presented are petroleum accumulation dynamics and oil-gas migration-accumulation mechanisms of below-source, in-source and above-source lithostratigraphic reservoirs in the South Songliao Basin, and the controlling factors of the petroleum accumulation and distribution for the 3 types of reservoirs.