Research And Implementation Of Seismic Reflection Wave Imaging System Based On Virtual Instrument Technology

Our complex terrain and abundant resources require the use of many efficient and reliable geophysical exploration systems.This paper proposes a set of seismic reflection wave imaging system solutions based on virtual instrument technology in which the modular seismic wave data pre-stack processing process is used to perform layered imaging of medium velocity on reflected waves.The paper also uses two digital filter methods to remove noise,direct waves,and other interference from seismic reflections.Based on modular hardware design and virtual instrument development technology,a complete set of hardware and software systems are developed.The main content of this article is as follows:(1)Based on the characteristics of seismic waves,the time and frequency domain characteristics of seismic wavelets transmitted in the reflection system are studied and simulated,and a mathematical model for the propagation of seismic reflection waves in horizontal media is established and simulated.(2)Based on the model,an implementation algorithm of the overall system is proposed,including amplitude compensation,digital filtering,velocity analysis,and migration imaging.In the filtering process,1D band-pass filtering and 2D FK filtering are used to conduct algorithm research and experimental tests.The tests verify the ability of two-dimensional FK filtering to effectively remove interference waves such as direct waves and surface waves.(3)Based on the architecture of virtual instrument technology,the overall system hardware and LabVIEW software was developed in detail.Seismic reflected wave imaging experiments were performed in a number of scenarios including indoor known ground environment and outdoor drilling data plane environment.Compared with the data,the experimental results meet the application requirements.The experiment proves that the system's test accuracy meets the requirements,and it realizes the imaging requirements of underground medium velocity using seismic reflection waves and virtual instrument software and hardware systems,which has certain engineering significance.