Abstract: In this paper the water coning into a well partially penetrating a naturally fractured reservoir under bottom water injection is examined by means of a fixed stream tube model.The generation and development of a water cone in the fractured system and an associated water cone in the matrix system as well as the whole water-cut process of the well aze presented.A clear-cut coning surface and ttze saturation distrilautions both era the surface anti inside of the cone are obtained.The mechanism of both the slcaw arise of the water-oil contact and the xapid water coning into a well axe revealed.Finally,a method to calculate the time-dependent critical production rate is given.All these results can,hardly be obtained by the conventional numerical reservoir simulation technique.

摘要： 本文在不变流管的假定下研究底部注水时裂缝性底水油藏中的单井水锥问题.给出了裂缝系统中的水锥和岩块系统中的伴生水锥的兴起和发展以及油井水淹的全过程.得到了演晰的水锥面以及锥面上和锥体内的饱和度分布,揭示了在底部注水时油水界面温和托进和暴性锥进的机理,给出了计算随时问变化的极限产摄的方法.这些都是用通常的油藏数值模拟方法所难以得到的.