CGG Sercel Brings its Technical Expertise to Structural Health and Earth Monitoring Markets

Added: 24th May 2019 by CGG

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At the very forefront of sensor technology

CGG Sercel has created two new brands, Sercel Structural Monitoring and Sercel Earth Monitoring, to bring the benefits of its advanced sensor technology to the high-potential Structural Health Monitoring and Earth Monitoring markets.

Renowned in the global geophysics industry as a leading provider of innovative seismic equipment and reservoir monitoring instruments, Sercel has designed and manufactured an extensive range of cutting-edge sensors for natural resource exploration for over 60 years. Sercel’s QuietSeis™ is currently the most sensitive MEMS (Micro Electro-Mechanical System) seismic sensor available and provides the most accurate data for all types of monitoring thanks to its unrivalled, ultra-quiet performance, with instrument noise below 15ng/√Hz.

Sercel’s sensor technology can bring significant benefits for Structural Health Monitoring applications. The resulting superior data quality delivers improved oversight of a structure’s condition over time and helps with the early detection of potential deterioration. Sercel is currently developing an integrated solution, in partnership with APAVE, for permanent structural monitoring.

QuietSeis™, together with Sercel’s existing wide range of high-sensitivity seismometers designed to record data from onshore to water as deep as 6000 m, is also being offered to the Earth Monitoring market, providing detailed and real-time observation of earthquakes, volcanoes and other natural hazards, such as subsidence and landslides.

The image shows the MicrOBS system, a next generation autonomous deep four-component ocean bottom seismometer (4C OBS) developed by Sercel. Each MicrOBS dives as far as 6000 m down to the sea floor by itself where it records for up to 24 days using a combination of three-component low distortion geophones and a hydrophone.

At any time, by sending a specific signal from the vessel, the devices will release their anchors and once at the surface emit a radio signal and activate a flashlight so they can be easily retrieved to download data and recharge batteries.

MicrOBS was designed for deep water refraction seismic surveys: using it in wide angle geometry provides excellent refractor arrivals from crustal discontinuities; and the four-component recording allows accurate characterization of compressional P-wave and shear S-wave velocities in deep crustal layers. This information is essential for determining the epicentre and associated mechanisms in the event of an earthquake and could also be used to more accurately monitor and investigate low-level natural seismicity in tectonically active areas.

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