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| | Abstract | | An experimental study was conducted in order to verify whether seismic reciprocity in transition-zone survey is obtained. Firstly, the comparison was made for the time-series recorded between an onshore geophone (vertical velocity) and an offshore airgun (explosive) source with these between an offshore hydrophone (pressure) and an onshore vibrator source (vertical force). Two of the waveforms were found to be very harmonious with each other. Moreover, a similar outcome was observed in a relationship of the time-series recorded between buried array of multi-component geophones (dilatation) and an offshore airgun source (explosive) with these between an offshore hydrophone (pressure) and an onshore dynamite source (explosive). The above experiments demonstrated that the seismic reciprocity in transition-zone survey was obtained. Data from different sources including vibrator, airgun and dynamite can be integrated to a full range shot- or receiver-gather from single source type. It is noted that a minimum-phase conversion should be added to data of the signature-known airgun and vibrator sources. Further studies are expected to gain more sophisticated approaches through advanced processing methods such as the data integration or interpolation using seismic reciprocity. |
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