稠油注蒸汽井三参数测试数据的解释计算模型

Interpretive Computational Model of Three Parameters of Steam Injection Wells

针对计算井筒总传热系数的常规算法的缺点,提出了两种改进算法,解决了常规算法在迭代过程中出现异常温度值和迭代结果依赖于初值选取这两个问题。从理论上证明了改进算法具有与初值无关的迭代收敛性。给出了根据井筒热损失计算结果计算井筒任意深度蒸汽干度的解析公式,建立了三参数高温测试的解释计算模型。

In accordance with the drawbacks of traditional algorithm for overall heat transfer coefficient, this paper presents two improved algorithms, solving two problems of traditional method. One is that abnormal temperature occurs during the iterative process. The other is that iteration result depends on the initial value. It is theoretically proved that the improved algorithm is independent of initial value. This paper also presents an analytical equation for computing steam quality at any depth in wellbore according to heat loss computational result and sets up an interpretive computational model of high--temperature test of three parameters.