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| | Abstract | | In Al Wasse field in the Kingdom of Saudi Arabia, we carried out the time-lapse study using an ACROSS seismic source and a geophone array from April to June, 2015. The amplitude and/or waveform change of P-wave portions are extremely small. The cross-correlation analysis of P-wave portions suggests that the temporal change of P-wave travel time could be 1.5 ms during two and half moths. On the other hand, later arrivals show much large change of waveforms and amplitude. Temporal changes in the later arrivals probably dominated by Raleigh waves are much localized and could be caused by movement of the aquifer layer due to water pumping besides the temperature effect causing the daily variation. |
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