本文利用天然气试井中计算井底压力的静气柱方法,提出一个适于油井套管测压的公式,并经过实践验证。文中对公式各参数的选值逐一进行分析讨论,重点解决了混合液柱平均比重的计算方法,提出了液柱平均比重与生产含水比的线性关系式,同时用原油溶解度随压力变化的矿场经验分析式,解决了地层条件下纯油比重(即直线截距)的取值。该法简便适用,可不动井口和管柱,同压力计实测对比,其相对误差不超过1.6％。 In this paper, a static column method for calculating bottom hole pressure in natural gas well test is proposed, and a formula suitable for oil well casing pressure measurement is put forward and verified through practice. In this paper, the parameters of each formula were analyzed and discussed one by one, and the calculation method of the average specific gravity of the mixed liquid column was mainly solved. The linear relationship between the average specific gravity of the liquid column and the production water ratio was proposed. Meanwhile, Empirical analysis, to solve the proportion of pure oil under strata conditions (ie, linear intercept) value. The method is simple and convenient, can not move wellhead and column, compared with the measured pressure gauge, the relative error does not exceed 1.6%.