砂岩透镜体油藏聚油机理及成藏模式

Accumulation Mechanism of Sand Lens Reservoir and Its Generation Model

通过对油气运移的受力状态进行分析 ,探讨了不同类型砂岩透镜体油藏聚油机理 ,根据砂岩透镜体油藏与烃源岩之间的相对位置关系将其划分为源岩内和源岩外两种模式 ,认为毛细管力是源岩内砂岩透镜体聚油的主要动力 ,而排烃压力、浮力等动力大于毛细管力、粘滞力等阻力是源岩外砂岩透镜体油气聚集的必要条件。典型实例分析对寻找砂岩透镜体油藏有一定的指导意义。

This paper discussed the oil accumulation mechanism of different types of sand l ens reservoirs by analysing their stressed states during oil and gas migration.T wo models of inside sourcerock and outside sourcerock were divided according to the relative locations between sand lens pools and sourcerocks.It is thought tha t capillary pressure is the primary power of oil accummulation in sand lens insi de sourcerock.However,it is necessary that explosion hydrocarbon pressure,buoya ncy are more than resistance force of capillary pressure、viscous drag etc.for o il accumulating in sand lens outside sourcerock.Typical examples analysis have g uiding meaning for seeking sand lens reservoirs. WTHZ.