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Principle and application : Geological study of the rock strata based on their electrical properties. Structural studies in both continuous and discontinuous contexts (determination of horizontal structures).
Geometry and depth of investigation : Punctual investigation (1D) underneath the centre of the layout. Several layout configurations available depending on the study area and the objective. Investigation depths vary from 0 to several thousand metres depending on the length of the layout and the geology of the study area.
Equipment : 2 GEOSTUDY GRM 3000 resistivitymetres 1 power plant Electrodes and cables enabling a layout length of AB 10,000 metres GEOSTUDY SEV and GEOSOFT WINSERV software for data processing
Results : Measured values of resistivity placed on bilogarithmic graph paper Geoelectrical cross sections Maps of the isohypses of the tops and bottoms of formations Maps of the transversal and apparent resistivity
Log : Lateral translation of an electrical sounding layout with a constant investigation depth of a few tens of metres Pin pointing of discontinuities (faults…)
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Principle and applications : Study of underground geological structures based on the electrical properties of the rocks Investigation of faults Investigation of cavities and underground objects Investigation of saltwater intrusions and water/soil pollutions Mineral deposits exploration
Geometry and investigation depth : Obtainment of 2D underground resistivity profiles. Several layout configurations available depending on the study area and the objective. Maximum investigation depth at the centre of the layout
Equipment : 1 IRIS INSTRUMENTS syscal R1 plus system, 1 switch plus extension box, 6 bobbins each containing 120 m of cable (12 electrodes), 1 power plant ELECTR II, PROSYS and RES2Dinv software for sequence creation, data transfer and data processing
Results : Pseudo sections on which the resistivity of the geological formations is represented by a colour chart Topography is taken into account
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Principle and application : Direct detection of water using a magnetic field to excite the hydrogen protons
Geometry and investigation depth : Layout consists of a cable square which side measures 75 or 150 metres Punctual investigation underneath the centre of the layout Maximum investigation depths of 80 metres or 150 metres depending on the size of the layout
Equipment : 1 IRIS INSTRUMENTS Numis Plus acquisition system, 1 GEOMETRICS G856 proton magnetometre, Software for data processing Mounted in a customized 4x4 TOYOTA Land Cruiser
Results : Results are shown as a graphic showing the water content of the different rock strata
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Principle and applications : Study of the interaction between electromagnetic waves of military source and the ground Investigation of faults Investigation of lodes Indications on the thickness and the dip of anomalies
Geometry and investigation depth : Profiles are made across the studied structure Investigation depth from 0 to 50 metres depending on the geology of the study area
Equipment : 1 IRIS INSTRUMENTS T-VLF acquisition system Software for data transfer and data processing
Results : Results are shown graphically as curves (Inclination, Ellepticity and Fraser) enabling to pin point anomalies as well as their thickness and their dip
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Principle and application : Emission of an electromagnetic wave in the ground and study of the reflected wave which is modified according to the electrical properties of the material it went through Investigation of cavities Pin pointing of underground objects (cables, pipes…) Structural studies
Geometry and investigation depth : Profiles resulting in a 2D image Investigation depth varies depending on the aerial
Equipment : 1 G551 SIR 3000 system 200 Mhz, 400 Mhz, 900 Mhz and 1500 Mhz aerials
Results : Radargrammes enabling a direct observation of underground structures and their depth
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Principle and application : Emission of an acoustic wave in the ground and study of the reflected wave which is modified according to the mechanical properties of the rocks it travelled through Structural studies
Geometry and investigation depth : Profiles resulting in a 2D image Investigation depths from 0 to several thousand metres depending on the energy of the emitted wave and the geology of the study area
Equipment : Set of LITTON LRS 309 vibrators, peak force 21000 lbs, set of P23 vibrators peak force 50000, SERCEL electronics VE416 and VE432, SERCEL 428 XL acquisition system, 1000 channels GEOMETRICS STRATAVIEW recorder, 1200 strings of 12 geophones
Results : Seismic sections enabling a direct observation of underground structures and the calculation of their depth
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WELL LOGGING : 30 probes of which 1 optical televiewer and 6 video cameras 7 winches containing up to 7000 m of cable Mounted on: 5 vans especially equipped for well logging 4x4 TOYOTA Land Cruisers
GEOLOGICAL, HYDROGEOLOGICAL and SYNTHETICAL STUDIES :
Hydrogeological exploration Aquifer studies Geological and geophysical synthesises
DRILLING : Trough GEOSPEC, GEOATLAS's drilling branch INGERSOLLRAND TH 60 rig Drilling capacity: 450 m FORACO SIS 66 rig Drilling capacity: 100 m, Drill rig FBE2G on Magirus Truck drilling capacity : 120 m
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Geophysical studies :
- Geoelectrical studies, totalising 8757 electrical soundings, with layout lengths ranging from AB 2000m TO AB 10,000 m
- High resolution reflection seismic studies, totalizing 900 km
- Refraction seismic surveys
- Well logging
- Video camera well inspections
Mixed studies : 5 surveys totalizing 469 electrical soundings, 576 electrical tomographies, 299 nuclear magnetic resonance of protons soundings as well as the corresponding geological field surveys
Synthetic studies :
- Synthetic study of the Moyenne Moulouya area and the Taourirt-Oujda corridor. Reinterpretation of 17,400 km of seismic sections;
- Synthesis of geophysical surveys (geoelectrical and seismic) in the Triffa plain;
- Synthesis of geophysical surveys (geoelectrical and seismic) in the Souss plain;
- Synthesis of geophysical surveys in the Essaouira basin;
- Synthesis of geophysical surveys in the Mejjat-Bousbaa plain and in the Chichaoua province;
- Synthesis of geophysical surveys in the Boudenib basin
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