基于岩石性质的钻进振动响应分析

Analysis of drilling vibration response based on rock properties

摘要:

岩石在钻头破岩工作时会产生振动，为了研究岩石特性对钻进过程中岩石振动的影响，提出一种基于振动的岩石特性识别方法。通过振动学理论和弹性力学知识建立岩石振动方程，利用数值模拟软件分析不同参数对岩石振动的影响。研究表明：冲击荷载下岩石产生振动，岩石特性对振动有紧密关系；岩石的密度、刚度和抗压强度对岩石的振动都有一定影响，其中岩石强度对振动的影响最为明显；岩石刚度越小，强度越小，在冲击荷载作用下，岩石振动越大。研究冲击钻进过程岩石的振动特性，对钻进参数设置以及岩性的识别有重要意义。

Abstract:

Rock vibrates when the bit breaks rock. In order to study the influence of rock characteristics on rock vibration during drilling, a vibration-based rock identification method is proposed. Rock vibration equations are established on vibration theory and elastic mechanics, and numerical simulation software is used to analyze the influence of different parameters on rock vibration. Research shows that rock vibrates under the impact load, and rock properties are closely related to vibration; the density, rigidity and compressive strength of rock has a certain effect on rock vibration, and the rock strength has the most obvious effect; the smaller the rock rigidity, the lower the strength. The rock vibrates more under the impact load. Studying the vibration characteristics of rock during impact drilling is of great significance for drilling parameter setting and lithology identification.