根据新的钻头—岩石相互作用模型预测井眼的轨迹

A PREDICTION OF DRILLING TRAJECTORY WITH A NEW ROCK-BIT INTERACTION MODEL

文中提出了一个新的钻头—岩石相互作用模型。该模型没有采用地层各向异性指数的概念,而是从横观各向同性岩石(地层)的本构方程出发,考虑了地层各向异性和钻头各向异性对井眼轨迹的影响,编制了相应的井眼轨迹模拟程序,该程序可在微机上运行。模型有利于现场推广使用,对定向钻井有一定的参考价值。

A new rock-bit interaction model is presented, in which the effects of bit and rock anisotropy on drilling trajectory are considered according to the constitutive equation for transversely isotropic rock instead of the rock anisotropy. It is simple and clear in concept. A computer program of simulating drilling trajectory is developed. The program can be run on a microcomputer for oil field use.