钻头钻进方向预测研究

Prediction of Drilling Orientation of a Bit

在分析了影响钻头钻进方向的各种因素和提出钻头钻进特征矩阵的物理量后，建立了钻头在各向异性地层中钻进方向的预测模型。模型把钻进方向与所用钻头、钻井条件、井眼状态和所钻地层联系在一起，可以在任何钻井情况下预测一定底部钻具组合的方位漂移和造斜／降斜趋势。

After an analysis of the various factors influencing the drilling orientation of a bit and the presentation of the physical quantity of the bit's drilling eigenmatrix,a model for predicting the drilling orientation of the bit in anisotropic formations is set up.The model relates the bit's drilling orientation with the bit condition,the drilling conditions, the hole condition and the condition of the formation drilled. It can be used for predicting the orientation drift and angle building/dropping tendency of a given bottomhole assembly under any drilling conditions.