定向井靶心距的准确计算定向井实钻井眼轴线与设计靶心的水平距离称为靶心距，它是衡量定向井轨迹控制技术的一个重要指标。由于设计靶心是以垂深确定的，而测斜数据又以斜深为基础算出垂深，这就带来一个测点的垂深与靶心垂深不吻合的问题。采用较接近靶心垂深（规定误差... Accurate calculation of directional well center distance The horizontal distance between the well axis of directional well and the design bull’s eye is called the target center distance. It is an important index to measure the directional well trajectory control technology. As the design of the bull’s-eye is determined by the depth, and the inclinometer data is calculated based on the incline depth, which brings about the problem that the vertical depth of the measuring point does not coincide with the darling of the bull’s-eye. Using the closer to the bull’s eye vertical depth (specified error ...