吐哈盆地鄯善油田注空气实验研究

Laboratory research of air injection in Shanshan oilfield in Tuha Basin.

为了研究注空气开采技术在我国轻质油藏应用的可行性,开展了吐哈盆地鄯善油田轻质油藏注空气低温氧化室内实验。研究表明鄯善油田注空气后油藏中可以发生低温氧化反应,且氧化随温度升高加速进行,最终可建立稳定的氧化前缘。研究确定了鄯善油田地层条件下空气的氧化特性、温度变化与氧化能力的关系、氧化前缘的建立及推移速度。取得了低温氧化反应动力学参数活化能和预幂率指数。得到了反应热和反应系数,确定了注空气低温氧化采油的驱油效率,为轻质油藏注空气开发技术的矿场实施提供了可靠的依据。

Laboratory experiment of air injection under the condition of low temperature oxidation in light oil reservoir in Shanshan.oilfield have been made in order to study feasibility on application of air injection technique to the light oil reservoir in China. The result shows when air is injected into reservoir in Shanshan oilfield, low temperature oxidation action will come into being, and it will accelerate as temperature goes up, then stable oxidation front will be established. The air oxidation features, the relation between oxidation ability and temperature change, establishment of oxidation front and its moving speed under the formation conditions were determined. The parameters of low -temperature oxidation reaction kinetics including activation energy, pre-power-law index, reaction heat and reaction coefficient were achieved. The oil displacement efficiency of low temperature oxidation recovery by air injection was determined. These provided reliable foundation for field practice of air injection development technique in the light oil reservoir.