摘要
水驱特征曲线法是一种重要的油藏工程方法,常用于预测可采储量及评价生产措施效果。水驱特征曲线种类较多,科学地选择水驱特征曲线具有重要的应用价值。通过大量的油田实例对比,笔者认为水驱特征曲线预测结果的可靠性主要取决于水驱特征曲线中直线段的稳定性,不同驱替类型油藏数据的计算结果表明仅依靠原油粘度选择水驱特征曲线的俞启泰方法尚有不足之处。本文通过绘制典型水驱油田的累积水油比与原油粘度半对数图版,分析了水驱类型、原油粘度与水驱特征曲线适用性的关系。研究结果表明,油藏的水驱类型是选用水驱特征曲线时应考虑的第一要素,原油粘度为第二要素,应在同一水驱类型内考虑按原油粘度来划分水驱特征曲线的适用范围,俞启泰法更适用于注水开发油田。
Water-drive characteristic curve is a significant method for recoverable reserve prediction and stimulation effect evaluation.There are many types of Water-drive characteristic curve.Selecting proper water-drive characteristic curve scientifically based on reservoir characteristic is of great valuableness for practical application in the field.By comparing and analyzing,the stability of predicted result through water-drive characteristic curve depends on the stability of the water-drive characteristic curve in the straight line segment.By calculating and comparing a couple of reservoirs,it＇s inadequate to select water-drive characteristic curve only by oil viscosity which proposed by Yu Qitai.By drawing aplate of oil viscosity in typical domestic water flooding field with cumulative ultimate water and oil rate,the relationship between reservoir type,crude oil viscosity and water-drive characteristic curve type suitable for the oilfield.The study results demonstrate water-drive type is the first factor while choosing waterdrive characteristic curve and the following is oil viscosity.Hence,differentiating water-drive characteristic curve scope by viscosity should be in the same reservoir type and the criterion put forward by Yu Qitai only apply to water injected oilfield.
出处
《内蒙古石油化工》
CAS
2015年第18期36-39,共4页
Inner Mongolia Petrochemical Industry
关键词
水驱特征曲线
水驱类型
原油粘度
Water-drive characteristic curves
Type of water drive
Oil viscosity
