提出了一种利用阴极保护地面测量参数和油井套管完井数据 来计算油井套管井下阴极保护电位分布的新方法.将这种方法应用到美国得克萨斯A井的结 果表明，计算值和实测值非常吻合，最大相对误差小于2%.
Although cathodic protection has been widely applied to oil well casings,it is a challenging job to determine the cathodic protecti on level of well casings at any depth without interruption of production. In thi s paper,a new method was established to calculate the potential distribution of well casing cathodic protection with several wellhead electrical measurements(i ncluding the applied current,the cathodic protection potential and the native-s tate potential) and well completion data(such as lengths and unit length resista nces of outer and inner casing). When the method was applied to Well A in Texas, the excellent agreement was obtained between measured and calculated cathodic p rotection potentials,the maximum percent difference was less than 2%.
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