High quality data is obtained by carefully selecting the recording system that best fits a project, and using only the most technologically advanced 2D/3D seismic acquisition systems.
Recorded data is transferred in real time to the processing system and migrating sections are created in real time. GTG has used Wireless Seismic RT System 2 real-time radio system since 2016.
Our surveying is DGPS supported. An accurate positioning and surveying is key for the data quality, and for the efficiency of the operations.
Our fleet of nine IVI Mark IV Vibroseis trucks provides the high energy level required for deep objectives.
Our fleet of industrial vehicles also includes off-road vehicles, truck with trailer, and mechanic service truck.
For rough terrains and all areas where access for land vehicles is cost-prohibitive, such as mountain areas, vineyards or orchards, we own a complete set of drill rigs comprising five man-portable rigs, one track carrier rig, and one tractor-mounted drill rig.
Our Q-HSE management system is based on the guidelines of IAGC (International Association of Geophysical Contractors) and the ISO 14001 standard.
We have used this real-time radio system since 2016, and carried out several 3D acquisition projects with more than 5,000 channels. This system helps minimizing the impact to the environment with faster deployment and shorter survey durations. Data is sent along a line of field units (WRUs), received at the end of each line by a line box (LIU) and then transmitted via Wi-Fi to the recording lab.
Self-contained nodes with integrated geophone and battery (30 days of autonomy), available in 1 component or 3 components. Nodes are advantageous in areas with difficult access such as mountainous areas or in cities.
Highly performing cabled system providing up to 100,000 active channels with a sampling rate of 2 ms.
During data acquisition, in accordance with our QA policy, we perform daily tests of the line equipment every morning prior to production, and ongoing monitoring of the ground electronics performance through the advanced GUI of the Wireless Recording RT System 2.
Overall coordination of recording operations is under the control of our Observer at the recording truck via a VHF radio communications network.
Data is recorded simultaneously on the internal hard drive of the recording system and on portable hard drives.
During acquisition, our chief surveyor performs data QC daily and reports progress.
Positions of receivers and shot points are recorded with GPS Trimble devices. In forest areas, we stake out the survey lines with a Trimble S6 Total Station. Occasionally, we use a backpack portable inertial navigation system, the B-PINS X, for areas without coverage such as urban canyons or some forest areas.
Topographic corrections are performed in real time with an accuracy of approximately 10cm.
Our fleet includes nine vibrators Ivi Mark 4 Y2400 providing each a maximum peak force of 48,000Lbs and a frequency from 5 to 200Hz. Ideal in size and weight for urban areas and narrow tracks: 8m long, 2.45m wide, 3.35m high, 24 tons. Fitted with noise reduction package.
Our vibrator was chosen to simulate an earthquake during the LiquefACT research project founded by the EU.
Our fleet also includes five Mertz 22 vibrators, with a peak force of 30,000 lbs.
EMCI Explo 220MPR and Sercel TD150S are both lightweight rigs, designed for difficult-access areas, offering a capacity up to 40m.
Sercel TD150C is a track carrier rig offering a capacity up to 50m.
Ellettari E500T is a drill rig mounted on a wheeled tractor. It has a rotary head with a max. torque of 480Kgm.
For each project, we develop a specific HSE Plan that complies with all applicable laws and industry best practices and that addresses the specificities of the project.
All our operations are carried out with safety and security in mind, for people, property and the environment. Our Q-HSE management system helps us improve our operational performance and productivity.
Security is our top priority, HSE awareness at all levels, Qualification and training of personnel, Audits and follow-ups, Emergency response plans, Communication.
High-resolution seismic data acquisition We use weight drop, accelerated weight drop or hammer as seismic sources, and deploy Wireless Seismic RT2 receivers.
For seismic operations in rivers and lakes, we use boats to deploy line of receivers, and we use airguns as seismic sources.
We have the capacity to deploy 3C receivers to record passive data.
We can provide a vibrator as seismic source for VSP operations.