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底水凝析气藏气井见水时间预测通常忽略了凝析油析出的影响,因此造成预测结果与实际结果有较大差异。为了更好地开发底水凝析气藏,需考虑析出的凝析油的影响。为此,文章在一定的简化条件下,根据描述水锥现象的相对简单的解析模型来讨论水锥的形成,推导出底水凝析气藏在凝析油析出时的见水时间预测公式。通过实例分析说明在对底水凝析气藏见水时间的预测时必须考虑凝析油的影响。该公式为深入研究水锥的机理以及控制见水时间等提供了有力的依据,这对做好底水凝析气藏的生产管理工作是十分有帮助的。

NEW METHOD TO PREDICT CONDENSING EFFECT ON WATER BREAKTHROUGH IN CONDENSATE RESERVOIRS WITH BOTTOM WATER 1)

The gas condensing effects are usually ignored when predicting water breakthrough in the reservoirs with bottom water. So, the predicted results are very different with real situation. To develop condensate reservoirs with bottom water better, the gas condensing effects should be taken into account when predicting water breakthrough. Under simplified conditions, based on the relative simple analytical model of describing water coning, the forming of water cone is discussed and the formula of water breakthrough for condensate reservoirs with bottom water when gas condenses is derived in the article. With real cases, it is dressed that gas-condensing effects must be considered to predict water breakthrough for condensate reservoirs with bottom water. The formula provides the strong ground for further studying the mechanism of water coning and controlling water breakthrough. Also, it is very helpful for operation management of condensate reservoirs with bottom water.