【摘要】 用有限元方法研究了自由套管井中不同直径的套管对声波测井的影响。数值计算例子表明,当套管直径增大时,套管波的幅度减小,视到时增大,主频有明显的降低。在设计和使用套管井中的声波测井仪器时,应尽量使用宽频带声波换能器,以适应于在各种直径套管的套管井中进行测井。更多还原

【Abstract】 The effects of casing diameter on acoustic log in cased-borehole at free pipe situation are investigated with finite element method(FEM).The numerical results show that,with the increase of the casing diameter,the amplitude,dominant frequency and the arriving time of the casing wave become smaller,lower and larger respectively.So,the transducers with wide frequency band should be used in acoustic logging tools.更多还原