Method for improving the performance of a water gun seismic source array including guns of different volumes

摘要

The performance of the far field pressure signature radiated by the water gun is improved by implementing either one of the following methods. The first method involves firing a water gun sub-array, which consists of a single P400 water gun and three S80 water guns. The second method involves firing a water gun sub-array, which consists of two water guns, a P400 and an S80, sequentially three times once with P400 and S80 water guns simultaneously and then twice with S80 water gun only. The effective far field pressure signature radiated by the second sub-array is obtained by summing the three far field pressure signatures obtained as outlined above. A P400 water gun has a firing chamber of 400 cu in and two ports and an S80 water gun has a chamber of 80 cu in and four ports.