基于水驱曲线计算水侵油藏水侵量的新方法

摘要

现有的关于计算水驱油藏水侵量的方法大多比较复杂。为了更加准确、简便的预测水驱油田水侵量，在水驱油藏水驱规律特征和水侵量计算方法的基础上，结合目前的生产动态资料，并基于甲型、乙型、丙型和丁型4种常用水驱特征曲线，利用 Welge 方程推导出油田油水渗流特征关系，再结合水侵量的物质平衡原理，建立了计算水驱油田水侵量的新模型。该方法不需要对水体形态及水体大小作任何假设，且计算所需参数容易获取。通过实例计算表明，新方法计算过程简便，计算结果准确，实用性强。%At present, most methods of calculating water influx of water drive reservoir are complex. In order to predict water influx more accurately and simply, based on researches of water drive regularity and characteristics and computational method of water in⁃flux in water drive reservoir, combined with present production performance data and four kinds of commonly used water drive char⁃acteristic curves, including A, B, C and D type, the oil and water seepage characteristic relation was deduced by using Welge equa⁃tion. According to material balance principle, a new model to calculate water influx of water drive oilfield was established. It is no need to do any assumption of aquifer shape and size by this new method, and the necessary parameters are easy to obtain. Examples show that the calculation process is simple, and the results are accurate and practical.