Modeling and Simulation of Electromagnetic Anti-collision While Drilling

Most of the traditional electromagnetic anti-collision technologies are passive and need to run instruments in adjacent wells, which seriously affects the normal production of the drilled well. This paper presents an active electromagnetic anti-collision monitoring method while drilling using the transient electromagnetic method. Based on the static model, the dynamic model of electromagnetic anti-collision monitoring while drilling is established and a transverse probe is set on one side of the drill collar to apply periodic transient currents. As the probe rotates to different directions, the magnetic field on the casing of the target well will change. This method does not need to run instruments in adjacent wells, which can improve the real-time performance of anti-collision monitoring. In addition, when the probe rotates to different directions, it can maximize the acquisition of surrounding formation information, realize multi-target detection. It provides a new idea for downhole electromagnetic anti-collision.