临南洼陷岩性油藏成藏动力与含油性分析

为了明确临南洼陷岩性油藏的成藏动力,评价砂体的含油性,通过对测井资料和典型油藏解剖,从等效排烃压力、围岩剩余压力及成藏指数、砂体充满度等方面进行了定量评价。研究表明,砂岩透镜体油藏因其被烃源岩包围且具有良好的生储盖组合,成藏动力最大,成藏条件最好,砂体充满度最高;砂体上倾尖灭油藏具有优质资源储配置及有利的输导体系,成藏动力大,砂体充满度较高;构造-岩性油藏由于储层物性变化较大,造成成藏动力及含油性变化大,砂体充满度较低。

Study on Hydrocarbons Accumulation Dynamics and Petroliferous Quality of Lithologic Reservoirs in Linnan Subsag

In order to determine the hydrocarbon accumulation dynamics and evaluate the oil-bearing properties,the equivalent charging pressure,shoulder-bed surplus pressure and reservoir index of each kind of lithological reservoirs in this area have been quantitatively evaluated based on the well logging and the analyzing of typical reservoirs.It is indicated that lenticular reservoirs have the highest filling degree due to the ＂surrounded within the mature source rocks＂ model and the excellent source-reservoir-sealing assemblage, the relatively largest pool-forming dynamics and the best reservoir forming conditions. Upclined pinch out reservoirs have a high filling degree, in that it is provided with the excellent combination between source and reservoir rocks and carrier system, and the high forming dynamics. The unstable physical properties of structure-lithological reservoirs result in variable forming-dvnamics and petroliferous quality, and make a low filling degree.