定向对接连通井轨迹设计

Intersected Well Path Design

摘要:

定向钻井轨迹计算方法很多，但在轨迹处理及图示反馈上均不直观清楚。通过坐标变换，建立了以井口与靶点连线为基准参考面的定向对接连通井轨迹设计方法。比较校正平均角法和最小曲率法，通过两次坐标旋转，说明建立以井口与靶点（或靶井）连线方位为参考面的坐标系的定向对接井轨迹设计方法及优点。并且这种设计方法也可用于其它轨迹计算方法中。通过本设计方法，可及时反应自井口到靶点（靶井）的钻井轨迹与目标的误差偏离。通过EXCEL编程及图示，运用EXCEL功能及时跟踪设计，使定向对接井设计与施工简单直观。采用此法累计已成功完成的对接井达100余对。

Abstract:

There are many ways to calculate directional drilling trajectory, but none of them are straightforward in trajectory processing and graphic display. A design method for directional well intersection is created with the connection line between the well point and the target as the reference plane through conversion of co-ordinates for twice. Through comparison with the calibrated average angle method and the minimum radius method, the design method is described with its advantages. This design method can provide errors between the drilling trajectory and the target in real time. Excel based software and graphics are used to track the design, resulting in simple and straightforward directional drilling design and construction. This method has been used to complete more than 100 pairs of intersected wells.