论文部分内容阅读
本文建立了在柱状介质内计算超声脉冲反射响应的二维数学模型,可方便地模拟水泥评价测井(CET)的各种测井模型。由于采用了反射系数的递推算法,使之能根据需要模拟套管井的各种胶结情况。文中给出了在3种典型情况下套管井内超声反射系数的计算公式。为深入研究水泥评价测井的弹性力学机制以及分析水泥固结质量与超声反射系数的关系,提出了一个合理的理论模型和算法。
In this paper, a two-dimensional mathematical model for calculating the ultrasonic pulse reflection response in a columnar medium is established, which can conveniently simulate various logging models of cement evaluation logging (CET). Thanks to the recursive algorithm of the reflection coefficient, it is possible to simulate the various caking conditions of the cased hole as required. In this paper, the formula of ultrasonic reflection coefficient in cased hole under three typical conditions is given. In order to further study the elastic mechanics mechanism of cement evaluation logging and analyze the relationship between cement consolidation quality and ultrasonic reflection coefficient, a reasonable theoretical model and algorithm are proposed.