微观剩余油实验方法研究

Experiment methods of microcosmic remaining oil

杨 珂 徐守余

中国石油大学地球资源与信息学院，山东 东营 257061

College of Geo-Resources and Information, China University of Petroleum, Dongying 257061, China

在油田注水开发过程中，由于储层微观条件的差异，注入水表现出不同的渗流特性。当油田开发结束时，仍有一半以上的原油滞留在储层孔隙中形成微观剩余油。研究微观剩余油的形成与分布，是现阶段提高油气采收率的重要手段。剩余油微观模型试验和微观仿真模型是2种有效的研究方法，可以在不同条件下进行不同类型储层的微观水驱模拟，较好地揭示了微观剩余油的分布特征和控制因素，为进一步认识和挖潜剩余油指明了方向，具有广泛的应用空间。

During water flooding, the injected water usually shows different infiltration features because of different micro reservoir conditions. There are more than half of reserves remaining in the reservoir porosity at the end of oil field exploitation, which is called microcosmic remaining oil. Investegating the generation and distribution of the microcosmic remaining oil is an important means to enhance recovery ratio nowadays. Microcosmic remaining oil experiment model and simulation model are two effective methods, which can be used to simulate micro water-displacement under different conditions in diverse reservoirs. It reveals well the
distribution and controlling factors of remaining oil, points out the direction for further understanding the potential of microcosmic remaining oil, and has a broad application prospect.