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中文摘要：
为了研究砂岩透镜体油气成藏机理，从生烃动力、生储油岩界面毛细管压力以及流体在生储油岩之间交换等方面进行了探讨，并通过物理模拟实验与典型实例解剖加以验证。认为无断层沟通的砂岩透镜体可以成藏，其成藏机理是：流体压差将泥岩中生成的油气驱向砂岩透镜体，毛细管压力差将泥岩与砂岩接触带的油气驱入砂岩透镜体，浮力使进入砂岩透镜体中的油气向其顶部聚集，砂岩透镜体中的水可以在毛细管压力差的作用下自然地由砂岩进入泥岩中。某些砂岩透镜体油气藏部分被油气充注而部分没有充注，不成藏的端元可能与驱烃动力不足、生烃高峰期滞后于成岩胶结期导致流体交换通道堵塞等有关。图15表3参33
英文摘要：
Petroleum accumulation of sand lens is a long controversial problem, because some sand lenses immerged in source rocks form reservoirs but others not. The accumulation mechanism of sand lens is discussed from hydrocarbon-generation dynamics, capillary pressure and fluidic exchange on surface between source and reservoir rocks, and demonstrated by physical simulation experiments. The study shows that fluidic pressure difference drives the petroleum generated from source rocks towards the sand lens, capillary pressure difference drives the petroleum situated at the contact belt into the sand lens, and buoyancy has the petroleum accumulated on the top of the sand lens. Meanwhile, water in the sand lens naturally escapes from sandstone to mudstone under the capillary pressure difference. So the sand lens can form reservoirs. The sand lenses without forming reservoirs may be relative to the insufficiency of hydrocarbon-driving dynamics and the stop of fluidic exchange passage due to the hydrocarbon-generating peak period being later than the diagenesis and cementation periods.
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