| Summary: | Since long ago, indirect study of the underground layers properties has been interesting to geologists. One method for this study was seismography which gained great interest besides other tools due to the different identity of waves and energy attraction phenomena in different layers. Vertical seismic profiling (VSP) is considered as a valuable method in oil and gas exploration. This method is used to estimate the rock properties in a well. In seismic operations elastic waves are sent down to the underground. Part of the waves’ energy is reflected after passing through the earth layers and are received by receivers on the ground level. The received data determine the situation of the underneath layers after being processed, and one of the most important applications of seismic data is in the oil and gas exploration field. Quality factor is one of the most important seismic detectors that shows itself apparently in VSP data results. The most substantial purpose of this study is to investigate the frequency content of the quality factor.
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