缝洞型碳酸盐岩油藏天然水体倍数估算方法

Estimation method of natural water bodies in the fracture cavity carbonate reservoir

针对缝洞型碳酸盐岩油藏储层内部形态、结构复杂,无因次水侵量计算缺乏匹配度较好的图版等问题,通过结合该类油藏的储层特点,以油藏物质平衡方程为基础,建立考虑窜流的碳酸盐岩储层数学模型,采用拉普拉斯变换及Stehfest数值反演等方法求解该方程的解析解,同时结合渤海X油田的生产历史数据以及储层的基本参数计算了该油田的水体倍数.通过对比分析,采用油藏数值模拟法得到的结果与本文计算方法较为一致,但是本文方法具有快速、简单等优点,该方法对相似油田快速估算水体倍数具有一定参考价值.

Considering of the complex internal shape and structure of the fractured cave carbonate reservoir,there is a few better matching plate for calculation of water influx.By combining the reservoir characteristics of this type of reservoir and based on the equation of reservoir material balance,considering channeling of mathematical model is established.Solving the equation by Laplasse transform and Stehfest numerical and plus the production history,basic parameter of reservoir of Bohai x oilfield,it is calculating the natural water bodies of x oilfield.Through comparison and analysis,the results by the reservoir numerical simulation method are consistent with the calculation method of this paper.But the reservoir engineering method has the advantages of fast and simple.This method has a certain reference value for calculating the multiple of water in similar oilfield.