广义水驱特征曲线计算年度可采储量方法

A METHOD OF GENERALIZED WATER FLOODING CHARACTERISTIC CURVE FOR CALCULATING ANNUAL RECOVERABLE RESERVE

总结了应用水驱特征曲线评价调整效果、计算年度可采储量的 8种方法 ,提出了应用一种新型广义水驱特征曲线lgNp=a -blg (Lp Wp) ,评价调整效果、计算年度可采储量的直线段平行移动法。算例表明 ,其操作极为简单、重复性强、计算结果准确 ,因而有很高的实用价值。还表明 ,老君庙油田“稳油控水”措施效果极为明显 ,其经验值得很好总结 ;对一些低渗、低粘的砂岩油田 ,由于产液能力下降或难以提高 ,其水驱废弃含水率达不到 0 98,因此计算技术可采储量时应注意研究其水驱废弃含水率。

This paper gives 8 methods of using water flooding characteristic curve to evaluate the adjustment efficiency and calculate annual recoverable reserve. It proposes a linear portion moving parallelly method which uses a new generalized water flooding characteristic curve to evaluate the adjustment effect and calculate annual recoverable reserve. Some cases prove that this method is easy to operate and repeatable with an accurate result and therefore practicable. The effect of “stabilizing oil production and controlling water cut” in Laojunmiao Oil Field is apparent. In some low permeable and low viscous sandstone oil fields, the liquid production capacity decreases or is difficult to improve, and the water flooding abandoned water cut cannot reach to 0 98, so water flooding abandoned water cut should be considered while calculating technical recoverable reserve.