Sercel developed the GI GUN to reduce or suppress the bubble oscillations of a single air gun. When the bubble created by the air gun reaches its maximum volume, air is injected. Depending on the characteristics of the injection, the buble oscillations can be reshaped and reduced, or totally suppressed.
A GI GUN comprises:
• One Generator to generate the acoustic pulse;
• and one Injector to reduce / suppress the bubble oscillations created by theGenerator.
The volume of the Generator can be easily changed from 25 in3 to 250 in3, and the Injector from 25 in3 to 105 in3.
Working pressure is up to 3,000 psi (210 bars).
The GI GUN is used in a wide range of applications. For example:
• One single unit - hazard surveys and high-resolution surveys.
• Small arrays of 1 to 6 GI GUN - shallow water and transition zones, arctic and antarctic surveys.
• Large arrays of 14 to 20 GI GUN - conventional and 3D deep seismic surveys.
• VSP and walkaway VSP.

The GI GUN arrays are also used:
• To generate shear waves in marine surveys;
• and for crustal studies (Monobulle Technique).
The Watergun
The S15 Watergun is capable of delivering a high-frequency, bubble-free acoustic pulse perfectly suitable for very high resolution applications. Compressed air is used to propel a water jet, which creates a vacuum cavity. When the vacuum cavity implodes from the surrounding hydrostatic pressure, it emits a strong bubble-free, high-frequency signal.

By acquiring Sodera and Seismic Systems Inc., Sercel benefits from the experience of more than 30 years of design and manufacture of marine seismic sources. These pioneering companies invented and patented several marine seismic sources and various pieces of peripheral equipment widely used by the industry through the years.

The product range includes 3 families of Guns including the G. GUN, the GI GUN, and the WaterGun.

The GI GUN family has been developed to reduce or suppress the bubble oscillations of a traditional air Gun. This is made possible by injecting air into the bubble created by the injection of air into the water from the air Gun. When the bubble reaches its maximum volume the right amount of additional air is injected into it controlling the collapse of the bubble and its associated noise. The GI GUN is comprised of a generator to create the acoustic pulse and an injector to reduce or suppress the bubble. The GI Gun can be used for high resolution surveys, transition zone and VSP.