提高环空摩阻法测量井漏位置精度的方法

Method to Increase the Accuracy of Measuring Lost Circulation Position Using Annular Frictional Drag

分析了引起环空摩阻法测量漏层位置误差较大的原因 ,提出了在钻进中 ,按一定井深间隔 ,将计算的循环摩阻与测量的循环摩阻按最小二乘法回归 ,并随着井深的增加 ,利用较新数据继续回归 ,据此可以建立较准确的环空摩阻计算公式 ,从而提高环空摩阻法测量井漏位置的精度。新疆油田现场应用表明 。

The causes of obvious errors in using annular frictional drag to locate the lost circulation position are analyzed in this paper. During drilling, more accuracy calculation formula can be founded by regressing the calculated annular frictional drag with measured one using least square method and using the newer data to regress continually with the increment of the well depth. The field applications in Xinjiang Oilfield show that it is an effective way to increase the accuracy of locating the lost circulation position.