使用最小曲率法计算邻井间法面距离的新方法

A new method of calculating normal plane distance between adjacent wells with minimum-curvature method

邻井法面距离扫描在钻井轨道设计、井间防碰计算等问题中有重要的应用。在井段曲线类型是空间圆弧的假设条件下,推导出了参考井法面与比较井眼轨迹的交点的解析计算公式,讨论了解的存在判别条件。使用解析计算公式替换了常规法面距离扫描算法中的迭代计算过程,给出了一个简化扫描算法,提高计算速度,在井眼轨迹监倥、井间防碰计算、可视化井眼轨道设计和可视化实钻数据处理的计算机软件开发等问题中都有较大的应用价值。

Normal plane distance scanning between adjacent wells is important in well trajectory design and anti-collision calculation. The scanning algorithm currently used calculates the cross point between the normal plane of a reference well and comparative well trajectory through numerical iteration process. The calculation is a lot of work. By supposing well curve is a spatial arc, an analytical formula for the cross point between the normal plane of a reference well and comparative well trajectory is derived, and the discriminant condition of a solution is discussed. The analytical formula is used instead of the iteration process in conventional normal surface distance scanning algorithm. This is a simplified scanning algorithm. It can greatly save the amount of calculation, improve calculation speed, and is helpful in computer software development in such respects as well trajectory monitoring, inter-well anti-collision calculation, visible well trajectory design and real-time drilling data processing.