一种新的绕障三维定向井轨迹设计方法研究

许多研究人员对绕障定向井设计作了较详细的研究，但在绕向判断的判断准则中漏掉了2种特殊情况；且在绕障五段制(或双增型)轨迹节点的排列顺序上少考虑了一些现场可能遇到的情况。文中提出了绕障定向井三维设计绕向判断的判断准则，并给出五段制(双增型)井身轨迹设计中节点排列顺序可能的10种情况，同时该方法可以推广应用在有任意段的三维井身轨迹设计上，还给出了利于计算机程序计算的所有公式和10种可能情况下的实例及其计算。文章提出的绕障三维轨迹设计方法对定向井设计和施工具有一定的参考价值。

A New Method on Bypassing Barrier 3D Directional Well Trajectory Design

Many researchers studied the bypassing barrier directional well design in detail,but not considering two kinds of special conditions on the criterion of bypassing direction judgment,and some arrangement orders of node of the bypassing barrier"S"or"L"type trajectory which may be encountered in the oilfield.The paper proposes the criterion on the bypassing direction of judgment of the 3D directional well trajectory design of bypassing barrier and gives the probably ten arrangement orders of key points of the bypassing barrier"S"or"L"type trajectory.At the same time,this method can be used to design any 3D trajectory widely,at last,this paper presents all formula which are available for computer program and some examples and as well calculations in 10 kinds of possible situations.This method has some useful referenced value in the directional well design and construction.