关键词: 碱-聚合物复合驱油藏, 流线法, 数值试井, 解释模型, 遗传算法, 自动拟合, 油藏参数

Abstract: The streamline method was used to study the alkaline-polymer flooding reservoir. The streamline numerical well-testing interpretation models for production phase and testing phase were established respectively in alkaline-polymer combination flooding reservoirs. In the model, the main displacement mechanisms and physicochemical phenomena during alkaline-polymer combination flooding period were taken into consideration as well as the influence of some factors such as reservoir heterogeneity, water-oil two-phase flow, complex well pattern, producing history. The parameters of reservoir were obtained using well-testing auto-matching method based on genetic algorithm. A new well-testing interpretation method was proposed to be suitable for alkaline-polymer combination flooding reservoirs in medium-high water cut stage. The spiracle reservoir model was calculated for an ideal inverted five-spot alkaline-polymer combination flooding reservoir. The pressure response features of well-testing were investigated in alkaline-polymer combination flooding reservoir. Streamline numerical well-testing interpretation software was developed. The practicability of the software and the model was verified by application examples in some oilfields.

Key words: alkaline-polymer combination flooding reservoir, streamline method, numerical well-testing, interpretation model, genetic algorithm, automatic matching, reservoir parameter