水驱油田经济可采储量计算方法的改进

Improvement of calculation methods for economically recoverable reserves in water flooding oilfields

将经济极限含水率与水驱特征曲线相结合是计算水驱油藏经济可采储量的简便方法。因此,怎样合理计算区块或开发单元的经济极限含水率是关键。根据盈亏平衡原理,利用油价、生产成本和产液量,结合财税政策,可以建立其计算模型。而实际生产中各区块或单元的情况比较复杂,影响因素较多,针对基本模型存在的问题提出了相应的改进方案,并利用实际案例对改进前后的模型计算结果进行了对比,表明改进模型的经济可采储量计算结果与生产实际更符合。

Combining limited water cut and water flooding curve is a simple way to calculate economically recoverable reserves, therefore, how to calculate the limited water percentage is very critical. According to the break-even principle, using oil price, production cost, liquid production and also combining the finance and tax policy, calculation model can be set up. In real production, the situation of each block or unit is complex, that is to say, there are many effecting factors. Directed towards the problem of the basic model, some improvements are put forward and correlation is carried out for the results before and after the improvement by using some real cases. Results show that calculation for economically recoverable reserve on the improved model is more in line with actual production.