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普通水平井轨迹由三部分组成：直井段，造斜段，水平段。辐向水平井是水平井系列中的高难度井，它除了有一段水平井段外，还有另外一条或多条分支井段。在实际设计水平井时，首先根据钻探目的及油气藏的空间组合模式设计水平井段，确定始靶点、终靶点及各轨迹控制点的坐标，然后按始靶点轨迹参数反推，设计造斜段的造斜点坐标、造斜率及垂直、水平位移，并确定井口坐标。设计分支井的目的主要是探明倾斜油层的油水界面，分支井段各控制点参数的设计方法与水平段类似。
Ordinary horizontal well trajectory consists of three parts: the straight section, made oblique section, horizontal section. Radial horizontal wells are difficult wells in the horizontal well series. In addition to a horizontal section, there are one or more additional branch sections. In the practical design of horizontal well, the horizontal well section is designed according to the purpose of drilling and the spatial combination mode of reservoir, and the coordinates of the initial target point, the final target point and the trajectory control points are determined. Then, Make oblique section of the bevel point coordinates, made of slope and vertical, horizontal displacement, and to determine the wellhead coordinates. The purpose of designing branch wells is mainly to find out the oil-water interface of inclined oil reservoirs. The design method of each control point parameter in branch well section is similar to that of horizontal section.