吐哈盆地轻质油藏注空气开发机理研究

Study on Development Mechanism of Air Injection in Light Oil Reservoir in Tuha Basin

轻质油藏注空气后,油藏特性会发生一系列的改变,在轻质油藏注空气实验研究的基础上,阐述了轻质油藏注空气后,油藏内物质与能量的运移原理。以鄯善油田为例,运用热采数值模拟手段分析了不同开发阶段注空气后油藏内原油低温氧化反应过程、相态变化及分布特征、油藏能量的变化分布规律。同时,研究了多种因素对油田注气开发效果的影响,阐明了注空气开发的主要驱油机理,对轻质油藏注空气开发进一步研究及矿场试验具有一定的指导作用。

When air is injected in light oil reservoir, reservoir properties will change. Based on laboratory research of EOR by air injection, migration theory of matter and energy in reservoir after air injection is discussed. Take Shanshan oilfield as an example. Using numerical simulation method of thermal recovery analyzes low temperature oxidation reaction, phase change law and distribution characteristic, distribution principle of reservoir energy change in different period of development after air injection. Effects of various factors on development of oilfield by air injection are studied, main oil displacement mechanism of air injection is presented, which provides guideline for further study and field experiment of air injection in light oil reservoir.