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Simulation Analysis of Axial Vibration Propagation in Horizontal Well

Guan Zhichuan*, Liang Deyang

In the oil field, most of the onshore oil wells are directional and horizontal wells. In the slide drilling process of horizontal wells, the friction drag problem is an important factor affecting the rate of penetration (ROP). The friction between the drill string and the well wall makes it difficult to apply Weight on Bit (WOB) to the drill bit, resulting in a decrease of the rock-breaking efficiency of drill bit and directly reducing the ROP. Axial vibrating drag reduction technology is an effective means of ameliorating the friction drag problem. In this paper, the relationship between the propagation distance of axial vibration in drill string in horizontal wells and the excitation parameters is studied using finite element method. The results show that reducing the friction coefficient, increasing the excitation frequency and amplitude can improve the propagation distance of axial vibration in drill string in horizontal wells. The propagation distance of axial vibration in drill string in horizontal wells is generally more than 200 meters and less than 700 meters. The results can provide a theoretical guide for the installation position and number of vibrating drag reduction tools in horizontal wells.