The mechanical responses in monopole acoustic LWD and their relation with the output voltage waveform

Abstract Acoustic logging while drilling (LWD), characterised by simultaneous and logging, is widely used to obtain the elastic parameters of formation around borehole. Most published monopole acoustic LWD simulation waveforms are routinely presented as pressure. However, these pressure disagree with voltage recorded in experiments. Here, find out reason inconsistent two waveforms, both piezoelectric effect transducer propagation wave integrally calculated finite-element method, obtaining waveform well mechanical waveforms. The quantitative comparisons between show that output cannot represent signal, but a combination multiple signals. Based on equation structure this paper, we formulate terms four quantities, i.e. radial strain axial stress displacement borehole fluid. Furthermore, contributions quantities different groups explored. Finally, after drill collar grooving reveal before should also be displayed when evaluating instead only previous studies.