流三段储油层上下部有比较厚的生油岩。储油层以生油岩为主夹有砂岩。油层内的流体形成水力封闭系统。当生油岩达到生油门限深度,生油岩成熟并且开始排烃的时候,烃类随着流体进入临近砂层中去。由于储层形成水力封闭,流体排不出去,再加上该构造岩浆活动,储层上下部形成的火成岩侵入体烘烤,使地层温度升高,流体膨胀。这是形成流三段储油层高温高压的主要因素。 Three sections of upper and lower reservoirs have relatively thick source rocks. The main oil-bearing reservoir sandstone sandstone. The fluid in the reservoir forms a hydraulic enclosure system. When the source rock reaches the threshold level, the source rock matures and begins to displace hydrocarbons as it enters the adjacent sand layer. Due to the formation of hydraulic closed reservoirs, the fluid does not flow out, coupled with the tectonic magmatic activity, the upper and lower reservoirs formed by igneous intrusion bake, the formation temperature, fluid expansion. This is the formation of three sections of the reservoir high temperature and pressure of the main factors.