Abstract: A mathematical model for calculation of bottom-hole flowing pressure of flowing wells for oil field with non-solution gas drive is proposed. The model is easy to manipulate, and as it requires only well head data, is par-ticularly applicable to oil field without data for analysis of physical properties of fluids. In the Shengtn oil field, the model has been used at 403 data points, with an accuracy of less than 4%. From correlation with 6 groups of data found in literatures, this model seems to be widely applicable. The author has studied the effect of variation of well head parameters on the bottom hole flowing pressure and established the statistical relationship between the well head parameters. A formula for calculating shut-in flowing pressure under a given working system is thus derived which gives a higher accuracy in field practice on 55 wells with well head pressure below 1Oatm.

摘要： 对非溶解气驱油田提出了一个计算自喷井井底流动压力的统计数学模型。该模型算法简便,只需要井口数据,因此特别适用于缺乏流体高压物性分析资料的油田使用。利用胜坨油田403个资料点计算的全部误差均在4%以下。根据六组文献数据计算对比表明,该模型有较广泛的适应性。分析了井口参数变化对井底流动压力的影响,确定了并口参数之间的统计关系;并由此导出了在一定工作制度下计算油井停喷压力的公式,对55个井口压力低于10大气压的资料点计算表明,这个公式精度更高。