对特高含水期水驱特征曲线上翘问题的新认识

发布时间：2018-08-06 17:04

【摘要】：室内实验和矿场实践表明,水驱特征曲线在特高含水期会出现偏离直线段上翘的现象从而会影响其使用范围。首先将渗透率曲线处理成油水两相相对渗透率比值的对数与含水饱和度始终为直线关系之后的形式,再利用正交试验的方法分析不同类型相对渗透率曲线、储层韵律性、油水黏度比以及储层纵向渗透率等因素对于水驱特征曲线上翘时机的影响。通过正交试验分析后发现相对渗透率曲线在高含水饱和度阶段的异常状况对于水驱特征曲线上翘的影响有限,由注入水无效循环形成的生产井的产出结构变化才是水驱特征曲线上翘的重要原因。最后通过物模实验与实际生产资料对所得出结论进行了验证。
[Abstract]:Laboratory experiments and field practice show that the characteristic curve of water drive will deviate from the straight line section and then influence the range of its use during the very high water cut period. First of all, the permeability curve is treated into a form in which the logarithm of relative permeability ratio of oil-water phase and water saturation are always linear, and then the different types of relative permeability curves are analyzed by orthogonal test, and the reservoir rhythm is obtained. The influence of oil / water viscosity ratio and reservoir longitudinal permeability on the upwarping time of water flooding characteristic curve. Through the orthogonal test analysis, it is found that the abnormal condition of relative permeability curve at the stage of high water saturation has a limited effect on the upwarping of water drive characteristic curve. The output structure of production wells formed by the invalid cycle of injected water is the important reason for the upwarping of the characteristic curve of water flooding. Finally, the conclusion is verified by physical model experiment and actual production data.
【作者单位】：中国石油大学提高采收率研究院;中国石油勘探开发研究院;
【基金】：国家科技重大专项“优势渗透通道识别与表征及控制无效循环技术”(2016ZX05010-003)
【分类号】：TE357.6

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