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本文提出了一种计算双重介质单井水锥过程的数值模拟方法。这种方法考虑了裂缝中的水通过渗吸置换岩块中原油的作用。根据实验结果,证明渗吸速度服从指数递减规律。因此可以用一个参数——半衰期来说明渗吸速度,从而减少了对实验参数的要求,加快了计算速度。用这种模型可以研完水锥形成发展过程,拟合与预测油井动态,研究各种参数对油田开发动态的影响。本文根据计算结果,分析了开发速度、打开程度、井距及渗吸速度对开发指标的影响,并对灰岩底水油田的合理开发,提出了一些看法。
In this paper, a numerical simulation method for calculating the single-well water coning process of double media is proposed. This method considers the effect of water in the fracture displacing the crude oil in the block by imbibition. According to the experimental results, it is proved that the rate of infiltration obeys the exponential decay rule. Therefore, one parameter, half-life, can be used to account for the rate of aspiration, thereby reducing the need for experimental parameters and speeding up the calculation. With this model, the development of water cones can be researched, the well dynamics can be fitted and predicted, and the influence of various parameters on the development of oil fields can be studied. Based on the calculation results, this paper analyzes the influence of development speed, opening degree, well spacing and seepage velocity on the development index, and puts forward some opinions on the rational development of the Limestone bottom water field.