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Survey Technologies

Although geophysical techniques focus primarily on the exploration of natural resources,they are also applied for environmental and urban civil engineering investigations. We offer a wealth of knowledge and experience to ensure that the most appropriate and best technology CGG has to offer is employed.

The table below is set out in order of depth of investigation (from a few centimeters to several kilometers).

Methods	Applications
Ground-Penetrating Radar	Underground networks (sewers, aqueducts, miscellaneous piping), shallow cavities Pollution by hydrocarbons, determining the nature of waste material Sounding structures, routing pipelines Fractures
Microgravity	Shallow voids, limits of refuse tips, quality of foundations Massive ore bodies
Ground-Based Magnetics	Eruptive rocks, faults Mines Environment: detection of buried ferro-magnetic objects
Seismic Tomography	Foundations and injections Fracturing Mining and oil exploration (static corrections for reflection seismic)
Electric Profiling and Electromagnetics with a mobile, short-distance transmitter	Salt pinch-outs, faulted or polluted zones (salt) Thickness of weathered and decayed rock on the basement, lithological contacts.
Borehole Logging	Hydrogeology: lithology and stratigraphy, fracturing, porosity, evaluation of cementing Mines: lithology (density, porosity) Civil Engineering: fracturing Hydrocarbons: static corrections and synthetic seismogram for seismic
Refraction Seismic	Thickness of the overburden Locating the water table Fracturing, faults Studies of household or industrial waste dumps
Electrical Sounding	Geological exploration, water quality, large basin structure
High-Resolution Reflection Seismic	Location of specific structures for mineral water, drinking water, geothermal springs Mining exploration (coal, pyrite, salt, potash) Tunnel or gallery routing Studies of underground storage sites
Magnetotellurics	Structural or stratigraphic surveys in mining, hydrocarbon and geothermal exploration
Gravity	Structural surveys: basins, domes, fault blocks, etc. Detection of solid ores: barite, sulphides, coal, salts, etc.

Onshore - General Geophysics - Resistivity

Resistivity Surveys

Rely on CGG for using the most appropriate resistivity method among a large spectrum of possibilities

Airborne Gravity & Magnetics

Cover large unexplored areas with airborne gravity and magnetics, and get full geological perspective.

Multi-Physics - Potential Fields Interpretation

Multi-Physics Interpretation & Integration

Leverage our advanced interpretation expertise. Integrating potential fields, geological and seismic data for a multi-disciplinary understanding of your challenge.

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Survey Technologies

Resistivity Surveys

Airborne Gravity & Magnetics

Multi-Physics Interpretation & Integration

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