水体倍数计算的拟稳态法

底水的体积对底水油藏的开发起着十分重要的作用,底水的大小用底水的水体倍数表征。目前常用的水体倍数求解方法有容积法、物质平衡法、非稳态水侵法、数值模拟法。不同方法有其适用的条件和特点。在假设储层达到拟稳态的条件下,推导了一种新的水体倍数计算方法;该方法结合地质储量、多次测试及物质平衡法等不同情况而分为三种子方法。新方法可以获得水体倍数和地质储量。利用推导的拟稳态方法对实际数据进行了计算,计算结果与其他方法的计算结果十分接近,表明新方法的可行性。

Pseudo-steady method for water volumetric multiple computation

The water volume of bottom water has an important role in the reservoir exploitation. The quantity of bottom water is represented by the water volumetric multiple of bottom water. By far, there are four methods of the computation method of water volumetric multiple, which are volumetric method, material balance method, unsteady water invasion method and numerical simulation method. Every method has its working condition and characteristic. In this research, a new computation method of water volumetric multiple is gained on the assumption of peso-steady state. The new method has three sub-methods by combining oil in place, multiple test and material balance method respectively. The new method can get water volumetric multiple and oil in place. Using the new method, a water volumetric multiple and oil in place have been computed with actual data. The results are closed to these of other methods, which imply the feasibility of the new method.