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按照相似原理,应用自己研制的油层物理模型,对正韵律厚油层注气提高上部层段采收率进行了实验研究。在非混相条件下,研究了油、气、水三相在不同地质特征的正韵律油层模型中的渗流机理;并且观察到在重力、粘滞力和毛管力作用下,油、气、水运动的特征及纵向分布特点。研究表明:油层地质特征是决定注气效果的关键;产出气液比是反映注气效果的重要指标。为开展渗流物理实验研究,研制了5～9米长的物理模型和油、气、水三相分离器,及进、出口计量等一套装置。对比了物理模拟实验和数值模拟研究结果,得出结论是一致的。为大庆油田正韵律厚油层现场注气试验提供了依据。
According to the principle of similarity, the oil layer physical model developed by ourselves is used to study the recovery of gas in the upper section through gas injection of the positive rhythm thick oil layer. Under the condition of non-mixed phase, the seepage mechanism of oil, gas and water phases in positive rhythm oil layer model with different geologic characteristics was studied. And under the action of gravity, viscous force and capillary force, the oil, gas and water movement Characteristics and vertical distribution characteristics. The results show that the geologic characteristics of the reservoir are the key to the gas injection effect. The output gas-liquid ratio is an important index reflecting the gas injection effect. To carry out the experimental study of seepage physics, a physical model of 5 to 9 meters and a set of oil, gas and water three-phase separators and a set of devices for measuring the inlet and outlet were developed. Comparing the results of physical simulation and numerical simulation, the conclusion is consistent. It provided the basis for the gas injection test of the positive rhythm thick reservoir in Daqing Oilfield.