【摘要】 考虑钻头各向异性、地层各向异性和地层产状的影响，改进了钻头和地层相互作用的ＵＰＣ理论模型，并以矩阵的形式表达。同时，给出了利用实钻资料反演钻头各向异性指数和地层各向异性指数等参数的数学方法。更多还原

【Abstract】 The anisotropy of bit and formation,andthe occurence mode of formations are taken intoconsideration to improve the UPC model which re-veals the interaction of bit and formation. The im-proved model is shown in the form of matrix. Mean-time a mathematic method is given to reverse theevolution of anisotropy index of bit and formationby use of actual drilling data.更多还原